scuba to paintball, SCBA to paintball, CGA paintball | Dive Flags, nylon, various sizes. | Nylon mesh bags are available in 6 colors and 4 sizes. The 3 largest sizes come with a wrist strap to prevent accidental loss. All bags come with a draw string closure. |
Weight molds, silicone lubricant & mold release agent. | A variety of mask, fin & snorkel straps in rubber, kraton & silicone. NEW Spring Loaded Fin Strap. | GMC offers a selection of useful plated-steel tips for spearguns and poles. Those designated 6-7mm come with an adapter for either 6 or 7 mm shafts. |
Hose Protector Sleeves, Valve Protectors, and Regulator/Valve Protector caps. | Lubricants: Silicone, Dow 111, Ever See Defog. | Workstations and Flowbenches are special machines for testing all the important functions of scuba regulators and tank valves. They essentially embody the necessary compressed air source, hand tools, and instrumentation into a single apparatus designed specifically to repair / evaluate dive equipment. Testing done on a Workstation yields results at sea level equivalent, whereas a Flowbench can simulate actual dives, providing information on regulator performance at depth! Besides elevating the efficiency and professionalism of any dive shop department, these devices are very practical for both classroom and sales demonstrations.
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Stock Low Pressure Breathing Hoses. Common 1st stage connector is 3/8-24. | The products shown below are used to check the pressure within scuba tanks. Models for both DIN and yoke tanks valves are offered. Most utilize a sealed, oil-filled, stainless-cased, 5000 psi pressure gauge for a maximum environmental and shock resistance. All models have a standard screw-type bleeder. NOTE: THESE PRODUCTS ARE NOT INTENDED FOR PURE OXYGEN / NITROX SERVICE: SPECIAL MODELS ARE AVAILABLE | GMC stocks most popular sizes of commonly used O-rings in both Buna N (black nitrile rubber). They can be ordered singly in any quantity, in handy bulk jars of 50 each, or in kits. Technicians should be aware that certain scuba repairs might require O-rings of special hardness or composition, and substituting non-compliance types may lead to serious malfunctions. Always consult manufacturer’s specifications / repair manuals in this regard. GMC’s TechSupport can often advise you on O-ring selections and applications. |
Tank Tumbling Equipment, washers & dryers. | Equipment for removing, inspecting and testing tank valves. | |
Filter towers with disposable cartridges, after-separator columns. | Dive shops must interconnect commercial gas cylinders to create stroage banks and “scuba air stations.” This requires a variety of specialized CGA (Compressed Gas Association) hardware and fittings with appropriate pressure ratings. GMC offers a wide selection of these items. SEE PRICELIST FOR BURST DISKS ASSEMBLIES FOR INDUSTRIAL VALVES. THESE ITEMS ARE NOT PICTURED OR LISTED IN THE CATALOG.
| CGA Nut & Nipples - These two-piece adapters fit respective CGA valve outlets and convert that connection to male 1/4” NPT thread. Wrenchtite models must be tightened with a wrench, whereas handtite versions do not and seal with an O-ring or plastic gasket. Most types are heavy-duty brass, but stainless steel can be used for very high pressure or for severe marine applications. Most tailpieces contain an internal filter to prevent dangerous particles from entering the gas stream.
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These special valves are used to protect pressure-sensitive components or to relieve pressure at some prescribed level in compressed air systems. Standard relief valves are designed for sudden, intermittent, and sporadic service, whereas “floater valves" activate slowly and are employed where frequent and prolonged valve openings may regularly occur.
| IN-LINE FILLER WHIPS
GMC produces scuba filler whips in two configurations: In-Iine and right-angle, which refers to the
position of the air-entry port relative to the long axis of the filler body. In-Iine whips, which contain
air-entry ports that are parallel to the hose, filler body, and tank attachment fitting have been the
industry mainstay for 50 years. Each comes with a 5-foot hose and line valve
In recent years, whips that have the filler attachment set at right angles to the hose and line valve have become quite popular. This configuration prevents excessive bending or straining of the whip hose and improves the handling of dive tanks which must be submerged in water cooling vessels or filled with BC’s / packs in place.
| OXYGEN ANALYSES - All custom gas mixtures must be analyzed for oxygen content. This demands an accurate oxygen analyzer and a metering apparatus to deliver sampled gas to the instrument at proper flow rate and pressure. If common analyzers are back-pressured as little as 3 psi, significantly erroneous results can occur. Most GMC metering devices contain a pressure-reducing regulator and a flow-controlling element. Deluxe models provide gauges to visually monitor both pressure and flow rate. Simpler units that utilize one’s dive regulator as a pressure reducer are also offered. All products are delivered oxy-clean.
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To deliver gases to or from GMC mixing apparatus, we offer a number of hoses, adapters, and connectors. Also available are several junction devices which are used to distribute or control multiple gas sources. All these products are delivered oxy-clean.
| These devices allow the interconnection of CGA gas outlet ports for cylinder charging or special diving applications. Each fitting has a CGA male outlet thread (same as a CGA tank valve outlet thread) on one end and NPT on the other. All are brass with a 3,000 psi rating.
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OXYGEN TRANSFILLERS - These devices are used to transfer pure oxygen from large commercial cylinders into scuba tanks or small medical 02 bottles. GMC transfillers have a 4-foot hose with stainless steel braid over a Teflon core and a CGA 540 green handwheel nut and nipple on one end. The opposite end has a bleeder block and scuba yoke (or DIN) to attach to dive cylinders or a CGA 870 yoke to connect to medical 02 bottles. Each 02 nipple contains a replaceable, internal filter to prevent sparking particles from entering the gas stream and an O-ring seated tip (#49011OX Viton seal). Each transfiller also contains a metering orifice to govern the rate of gas transfer, since speedy oxygen compression is dangerous. 2,700 psi rated service. CAUTION: Transferring oxygen requires special procedures
| | CGA Manifold Tees and Pigtails To join a series of commercial gas cylinders of the same CGA type, MANIFOLD TEES and PIGTAILS are needed. These are usually made of brass and copper, although stainless steel is sometimes needed at high pressures or in marine environments. TEES attach directly to the CGA tank valve, thereby providing two extra CGA outlets to interconnect two additional cylinders. Interconnections are made with a PIGTAIL, a metal, looped tube (or hose) with CGA nuts on each end. Loop construction permits spacing adjustments between cylinders and also absorbs sonic vibrations during compressing operations. Pigtails can interconnect tees or go directly to a compatible CGA tank valve.
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| Reusable Compression Fittings - Tubes must often be joined together or adapted to other system components. Compression fittings employ a nut and ferrule which crimp onto the tube forming a detachable union that is stronger than the tube itself. Some fittings also adapt the tube to a 1/4” pipe thread (NPT).
| All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerateing gears. Both size hoop bags constructed with strong Dura-Mesh in assorted colors. Large 18" diameter x 36", Medium 12" diameter x 30". |
This half-mesh / half-fabric bag measures 15" x 30" with a heavy-duty central top zipper. Soild Cordura fabric forms the bottom and about on third (8"x30") of the sides; each side panel is constructed of our Dura-Mesh. When desired, an internal fabric flap can be unrolled to cover the equipment for security purposes. Each end panel of the bag has a zippered pocket. | 4 carrying cling handles, zippered pocket, 15" innertube (not included). | 4 carry / cling handles, D-ring anchor on bottom, Top-open (no pockets), bottom-strong PVC mesh, 15" innertube (not included). |
All Stainless construction with Teflon & Viton inner seals and a specials lubicant; offered in three different 1/4" NPT threading configurations. 5000 psi service. | Common O-Rings available in bulk jars. | A very popular bag constructed of Dura-Mesh with solid nylon end panels. A water -repellent, zippered pocket is sewn onto one end panel. Each bag has a top zipper and wrap around carrying handles. Large - 15" x 30" (shoulder strap included) |
All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerateing gears. Both size Super Hoop Bags are made with stout black Dura-Mesh on the bottom topped with strong upper panels of nylon fabric. On each panel is a convenient, zippered utility equipment pocket. Large 18" diameter x 36", Medium 12" diameter x 30". | Pressure Hose Adapters - Pneumatic hose systems often use end fittings consisting of a swiveling compression cap (JIC) which mates to a dome-shaped pipe fitting, thereby adapting hose to 1/4” NPT. Swivel caps allow the hose to be properly aligned before the cap is tightened to form an air-tight joint. JIC’s can be detached whenever necessary.
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Storage Cylinder Valves GMC stocks heavy brass industrial valves for the gas cylinders commonly used by dive shops in storage banks. Each valve has a specific CGA outlet, burst disk assembly, and 3/4” NGT inlet thread. When ordering valves, you must specify the service pressure of the cylinder to get the proper, Federally required, safety disk! See price list for spare industrial safety burst assemblies (disk, washer and cap) or valve rebuild kits. ( Sherwood valves only).
| INERT GAS TRANSFILLERS
Modern TEK diving often employs such inert gases as helium or argon. GMC produces a number of transfilling devices for handling these gases. They possess the same Teflon-core hoses with stainless overbraid and filler hardware used on our 02 units, but the handwheel and mating nipple is CGA 580. No metering orifice is required. 3,000 psi service.
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These two-piece adapters fit respective CGA valve outlets and convert them to male 1/4" NPT. Wrenchtite models must be tightened with a wrench, whereas handtite versions do not, and seal with an O-ring or plastic gasket. All nipples, also called tailpieces, are heavy brass, rated for 3,000 psi, and contain an internal particle filter, except where noted.
| Preparation of diving gas mixtures requires the use of special gauges which are more precise than normal process gauges. Nitrox / Trimix certification agencies all agree that instruments with 0.25% accuracy (1/4 of 1%) must be used to routinely get correct mixtures. GMC offers several mixing gauges with test-gauge accuracy as well as oxy-clean process gauges (1-3% accuracy) for general applications. All models delivered oxy-clean.
| Hyper-Filtration for Nitrox Preparation
With the widespread popularity of Nitrox diving, numerous dive shops are mixing air with pure oxygen to produce saleable "enriched air" mixtures. For safe blending, compressed air of purity greater than normal Grade E must be used. Known as "Oxygen Compatible Air" or OCA, this gas is permitted to have no more than 0.1 mg / M3 of hydrocarbon contaminants, whereas Grade E scuba air can contain 50 times that amount (5 mg / M3). Some dive shops are able to produce OCA with their regular processing systems if the compressor, lubricant, moisture separators and filters all function absolutely flawlessly. Many other air systems cannot achieve air of this purity under any circumstances. To routinely obtain OCA, most shops reprocess their Grade E air by passing it through an addition special filter known as a Hyper-Filter, which are described below .
Hyper-FiIter Systems
These special hi-tensile aluminum towers will accept ONLY specific Hyper-Filter cartridges which actually "recirculate" the gas through high-purity chemicals that remove even trace level hydrocarbons. These super-filtration systems also control the pressure and flow rate at which the gas moves through the chemicals, thereby assuring complete removal of finite contaminants. Each Hyper-Filter System consists of the tower(s) with filter cartridge(s) plus pressure-controlling priority regulator, flow governor, gauge and check valves, all mounted on an aluminum base plate. Double and single tower systems are available. This apparatus not only produces OCA, but also serves as a safety backup in case of an unforeseen compressor / filter failure which releases dangerously high levels of hydrocarbon-contaminated air!
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CUSTOM SYNFLEX AIR HOSES - GMC offers 3 types / sizes of thermoplastic hose for compressed air applications to 5,000 psi with a burst of over 20,000 psi! Select 3/16” ID for fill whips and other uses where good flexibility and moderate flow rates (below 50 CFM) are required. Pick 1/4” ID where severe / outdoor duty, long interconnections, or high flow rates (+50 CFM) are involved. Parker Breathing Air Hose, 6,000 psi duty, is OSHA-approved for human respiration use where certified hose is required.
END FITTINGS - Order hose by the foot and specify any 2 end fittings for that hose: 1/4” male NPT, female #4 JIC (rotatable cap/nut), 1/4” male NPT swivel (only when depressurized).
| | CGA Thread Adapters - Brass fittings with a CGA outlet thread on one end and common 1/4” pipe thread on the other. All adapters have a 3,000 psi service pressure except #45014 which goes to 6,000 psi.
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GMC offers a complete line of fittings for manifolding gas storage cylinders into cascade systems. Industrial / medical gases each have prescribed CGA (Compressed Gas Association) fittings to prevent accidental mixing and maintain commensurate pressure ratings. Each CGA fitting has a specific shape and thread which will MATE only to a matching fitting. Each matched fitting system is designated by a CGA number. GMC stocks manifolding hardware for standard breathing air to 3000 psi (CGA 346), hi-pressure breathing air (3000 - 5500 psi), oxygen (CGA 540), and inert gases like helium and argon (CGA 580). All commercial gas cylinders have specific CGA outlets on their valves, and a corresponding adapter / fitting is needed to mate with it. Direct valve connections require a nut and nipple (also called a tailpiece), to achieve a gas-tight seal. Occasionally, thread adapters are required to convert CGA connections to more practical threading systems. Special converters are also used to interconnect CGA outlets where gases and pressures are compatible. GMC offers a variety of CGA nut / nipple connectors as well as CGA thread adapters and converters. | | |
Tools for internal inspection, VIP lights and stickers. Also, find mirrors, thread inspectors and pit gauges. Custom VIP stickers availabe with your company information. | Media, Solutins & Supplies for tank tumbling. | These air transfer devices, also called cross-overs, are used to equalize pressure between two dive cylinders. Each unit has a 2-foot, 5,000 psi service hose and a bleeder vent on one end. Both DIN and standard / yoke-mode types are offered. CAUTION: THESE PRODUCTS ARE NOT INTENDED FOR PURE OXYGEN / NITROX SERVICE! SPECIAL MODELS ARE OFFERED FOR THAT PURPOSE. |
Stock low pressure breathing hoses. Over-size breathing ports are 1/2-20. | Workstations and Flowbenches are special machines for testing all the important functions of scuba regulators and tank valves. They essentially embody the necessary compressed air source, hand tools, and instrumentation into a single apparatus designed specifically to repair / evaluate dive equipment. Testing done on a Workstation yields results at sea level equivalent, whereas a Flowbench can simulate actual dives, providing information on regulator performance at depth! Besides elevating the efficiency and professionalism of any dive shop department, these devices are very practical for both classroom and sales demonstrations.
| Wet Suit Cement, Clear and Black. Thinner. |
Dive Flags, vinyl, various sizes. | Neoprene has been the standard material for fabricating regulator mouthpieces; in recent years, clear silicone (crystal) has become the top-of-line rubber for that purpose. Similarly, the synthetic Draton has also proved to be soft, durable and rot-resistant. | Built of fiberglass and stainless components, these popular hand spears are offered in two styles. The travel spear dismantles into a convenient size for transport and comes in a fabric case. 6mm connections. |
54" precut webbing for belts | All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerating gear. | paintball couplers, scuba whip to paintball adapters |
GMC offers gear bags in nylon mesh, Cordura Nylon fabric or a combination of both mesh and fabric. Check out our bags to carry all your gear. | Bulk webbing available by foot and 150 foot rolls. Some rolls may not be continuous. | Leg and Watch velcro straps in a variety of colors. |
| These vinyl devices can double as retainers and covers for most regulator mouthpieces. Each comes with a stainless split ring for anchoring purposes. Two popular shapes are offered. | Alpha Flags, Nylon & Vinyl, various sizes. |
For those dive shops who are not yet ready for a Flowbench or Workstation, GMC has a number of portable and desktop test instruments for scuba regulator and valve service. Certain apparatus such as #48105 and #48110 were designed as modules to work alone or in tandem. When used in unison, the modules create a mini-Workstation which was purchased one piece at a time.
| Nitrox & Pure Oxygen Medical Grade Green Regulator Hose. Supplied oxy-clean with Viton O-Ring. | Whips & Brushes for tank and valve service & maintenance. |
GMC stocks most popular sizes of commonly used O-rings in Viton (oxy-compatible fluorocarbon rubber). They can be ordered singly in any quantity, or in kits. Technicians should be aware that certain scuba repairs might require O-rings of special hardness or composition, and substituting non-compliance types may lead to serious malfunctions. Always consult manufacturer’s specifications / repair manuals in this regard. GMC’s TechSupport can often advise you on O-ring selections and applications. | Filters available for GMC towers, also limited cartridges for Innerspace, Bauer, MAKO, and Lawrence Factor. | GMC stocks a variety of valves for gas control applications at various pressure ranges. Control of some gases such as oxygen demand special consideration and certain valves are NEVER O2 compatible. Engineering questions should be directed only to our TEK department at 414-774-1616 or techsupport@gmcscuba.com.
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CGA Converters - Brass adapters to interconnect compatible CGA systems for special uses, such as oxygen control devices on other gases. Rated for 3,000 psi servIce .
| These special devices create one-way gas flow in compressor lines, filter systems, and gas distribution panels. Brass types are suitable for pressures to 3,000 psi; stainless models for 5,000 psi service. These are NOT suitable for O2 / Nitrox use (See valves #45280-82).
| Stainless Steel Tubing
GMC offers seamless stainless tube suitable for 5,000 psi service applications. Useful for gas delivery lines in scuba air systems and control panels. When OXY-CLEANED, it’s also suitable for oxygen / Nitrox use. Sold by the foot and shipped in a large coil, although straight lengths to five feet can be sent. Longest continuous length is 20 ft.
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These devices allow the interconnection of CGA gas outlet ports for cylinder charging or special diving applications. Each fitting has a CGA male outlet thread (same as a CGA tank valve outlet thread) on one end and NPT on the other. All are brass with a 3,000 psi rating.
| Preparation of diving gas mixtures requires the use of special gauges which are more precise than normal process gauges. Nitrox / Trimix certification agencies all agree that instruments with 0.25% accuracy (1/4 of 1%) must be used to routinely get correct mixtures. GMC offers several mixing gauges with test-gauge accuracy as well as oxy-clean process gauges (1-3% accuracy) for general applications. All models delivered oxy-clean.
| Many gas booster outlets are 3/8” JICM which is difficult and expensive (over $100) to convert to pipe threads with oxy-compatible adapters. Solution: replace the entire tee with this special fitting which has a 1/4” male NPT outlet.
Handling, processing, or mixing Nitrox or pure oxygen requires special equipment which is BOTH oxygen-compatible and oxygen-clean. Most such equipment will be made from brass or stainless steel with softgoods of 02-compatible polymers like Teflon or Kel-F. Many devices suitable for air cannot be used safely in high O2-environments. GMC offers a good selection of hardware for oxygen-related applications. Each item is delivered oxy-clean.
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| Metering Valves and Orifices -Transfer of oxygen for safe mixing requires low charging rates (50 - 70 psi / minute) into dive tanks. This can be difficult to achieve with normal tank or line valves which are really high flow devices. GMC offers two types of special valves that can meter 02 and other "clean gases": Precision Metering Valves and Gas Flow Controllers. Metering valves have needle-like stems and seats which provide a wide range of flow with precise, but adjustable, metering. However, these valves are sensitive to rough
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High Pressure Pipe Fittings - National Pipe Thread (NPT) fittings are the most common type found in scuba gas systems. With Teflon tape, these tapered threads seal by metal-to-metal friction. Sizing is determined by inside bore diameter, NOT by outside dimensions.
| A huge model, similar to our popular super hoop "catch" bags hinges open onto a 24" metal rim. All-mesh or mesh-plus-fabric. All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerating gear. | This bag offers rugged Cordura nylon bag at a very affordable price. The large Econo Bag has a round, vented mesh end panels with a lengthwise zipper and sewn-in carrying handles. Large Only 30" x 15" |
Snorkelers perfect gear bad. It is constructed of super-strong Dura-Mesh affording full visibility and drainage while sporting a sturdy 10" x 17" zippered, water-repellent nylon front pocket for accessories. The bag has a heavy duty shoulder strap, draw-string closure, and solid nylon bottom pane. | A huge model, similar to our popular super hoop "catch" bags hinges open onto a 24" metal rim. All-mesh or mesh-plus-fabric. All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerating gear. | Oxygen BIeeders and Vent-Drains - Like air, oxygen lines must occasionally be drained or purged; oxygen-clean and compatible hardware should be used for this purpose. GMC products have all-stainless bodies, 1/4" NPT ports, and replaceable Teflon seats.
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| Handling, processing, or mixing Nitrox or pure oxygen requires special equipment which is BOTH oxygen-compatible and oxygen-clean. Most such equipment will be made from brass or stainless steel with softgoods of 02-compatible polymers like Teflon or Kel-F. Many devices suitable for air cannot be used safely in high O2-environments. GMC offers a good selection of hardware for oxygen-related applications. Each item is delivered oxy-clean.
| GMC manufactures and distributes a large number of filling devices and related hardware for charging tanks with both DIN and YOKE-mode valves. In general, yoke systems are for 3,200 psi service, whereas DIN types rate at 4,500 psi. For more details see the section on "Flller Whips" on pages 41 - 42. CAUTION: THESE PRODUCTS ARE NOT INTENDED FOR PURE OXYGEN / NITROX APPLICATIONS WITHOUT CERTAIN MODIFICATIONS INDICATED BY OX PART NUMBERS.
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The creation of scuba air stations requires a variety of high pressure fittings and components as well as certain specialized control hardware. GMC stocks a good selection of these materials. CAUTION: THESE COMPONENTS ARE FOR AIR SYSTEMS AND ARE NOT INTENDED FOR USE WITH PURE OXYGEN OR NITROX.
| Monitor air quality by means of obvious color changes in parchment sensor disks. | GMC stocks most popular sizes of commonly used O-rings in both Buna N (black nitrile rubber) and Viton (oxy-compatible fluorocarbon rubber). They can be ordered singly in any quantity, in handy bulk jars of 50 each, or in kits. Technicians should be aware that certain scuba repairs might require O-rings of special hardness or composition, and substituting non-compliance types may lead to serious malfunctions. Always consult manufacturer’s specifications / repair manuals in this regard. GMC’s TechSupport can often advise you on O-ring selections and applications. |
7/16 High Pressure Hose, Black Only. | For those dive shops who are not yet ready for a Flowbench or Workstation, GMC has a number of portable and desktop test instruments for scuba regulator and valve service. Certain apparatus such as #48105 and #48110 were designed as modules to work alone or in tandem. When used in unison, the modules create a mini-Workstation which was purchased one piece at a time.
| Three handy tools that connect to the BC hose coupler on many dive regulators. BC hose adapter included. |
Custom sizes also available. | A selection of snaps for a wide variety of equipment applications. Constructed of brass and stainless components. | Weight belt buckles and keepers; plastic and Stainless Steel. |
Variey of colors, sizes and styles. | Deluxe Pocket Weight Belt, Nylon Soft Pouches and Sealed Lead Shot Pouches. | Variety of misc. Clips, Lanyards and D Rings. |
Black, amber and blue coated tubing is size by outer diameter (OD) and wall thickness that determines the weight and stretch of the tube. 7/16", 1/2", 9/16" and 5/8" OD available. TEK tubing is available in 1/4" OD. It has a thick wall but is very strong and easy to knot. | This apparatus, offered in four distinct versions, is the current industry standard for testing the water-tight integrity, accuracy, and overall function of depth gauges, watches, dive computers, and certain underwater photographic gear. It's also useful for classroom demonstrations related to diving physics and physiology. Each unit is fitted with an internal plastic bucket so that equipment is actually tested underwater. In fact, many modern instruments may be harmed if tested dry because pressurized air can be forced behind seals and diaphragms! As modern TEK diving becomes widespread, it's essential that related life-support instrumentation be tested on a regular basis. | Buoy units include a styrofloat with counter-weighted flag staff and retainers. Flag Assemblies include a staff, metal holder and strap for innertube. ORDER FLAGS SEPARATELY! |
Variety of tank boots, shields and tank holder bracket. | Standard 28" BC hose, 3/8-24 thread. Other BC hoses: Aqualung, Scubapro, and Dry Suit hose. | |
Modern scuba air filtration systems utilize disposable, prepacked chemical cartridges. Some dive shops with older systems still prefer to repack their STEEL filter towers with bulk chemicals or to use repackable stainless liners within ALUMINUM towers. Aluminum housings should NEVER be free-packed because filter chemicals can react corrosively with the metal walls and weaken the tower. Repacking with bulk filtrants can be economical, although it is messy and time consuming when compared to throw-away cartridges. Also, free-packing must be done in a discrete manner and order or the filtration process will fail. GMC offers the bulk chemicals for air filtration and our TECH Department can advise you on the techniques required 414-774-1616 or techsupport@gmcscuba.com
| Dive shop air systems usually contain a number of pressure gauges. GMC stocks a selection of instruments with different pressure ranges, dial sizes, and mounting styles. Most of these gauges have an accuracy of 1-2% of full scale. CAUTION: THESE GAUGES ARE NOT INTENDED FOR USE WITH PURE O2 / NITROX WITHOUT FURTHER MODIFICATION AND ARE NOT SUITABLE FOR GAS MIXING PROCEDURES. SPECIAL TYPES ARE OFFERED FOR THAT PURPOSE (page 54).
| Scuba tank filling hardware wears out from age and pressure stressing, so it must be occasionally replaced or revamped. A wide selection of repair components for this purpose is offered, including various specialty devices.
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Oxygen and Inert Gas Transfillers. Yoke and DIN models. | Nitrox / Oxygen Manifold Blocks Creating diving mixtures from raw gases often requires a mixing vessel, or plenum, which can be the tank itself augmented with a manifold to interconnect various system components. Oxy-clean versions of our air manifolds (#45386/45384) work well for this purpose. GMC offers a long block and a compact style with multiple 1/4” NPTF ports and associated mounting brackets.
| This 12" x 18" bag is fabricated of tough Cordura nylon. It opens to a 9" diameter which is gussetted for extra expansion if needed; 2 velcro strips hold it flat for normal use. An outer 8" x 10" pocket is handy for storage. 2 split rings, one within this pocket and the other on the front provides an anchor point for safety lanyards. An adjustable D-ring and strap (removable) on the backside of the bag holds it close to the diver's body. Multiple grommetvents rapidly drain the bag. All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerating gear. |
| This heavy duty, Cordura nylon bag hinges open to a 18" diameter. This bag is shaped like a half-moon, measuring 24" across x 15" high with a 8" x 10" outside pocket. Eight grommet-drains quickly empty the bag of trapped water. Duralon D-rings on the bag will secure it to the diver or can be used as lift-points for a surface line. All GMC Hoop Bags are constructed with a heavy galvanized steel hinged hoop and metal closure clip. Double handles provide for easy grasping and carrying. Bags are handy for rinsing, draining and aerating gear. | Breathing Gas Quick-Couplers - Quick disconnects are very popular for rapid switching of supply hoses during gas mixing operations and for various TEK diving applications. GMC offers a special, hi-pressure brass coupler capable of 5,000 psi service. Straight-through (no check valve) configuration with 1/4" NPT ports. Suitable for mixed gas applications, including pure oxygen. Has only one simple Viton, O-ring seal (Replacement: Order #49110OX). All couplers and mating studs are delivered oxy-clean.
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| Used to check the pressure within scuba tanks or to equalize the pressure between 2 cylinders containing Nitrox / O2. Equalizers have 2-foot teflon-lined / stainless steel hoses and bleeder vents. Models for both yoke and DIN tank valves are offered. Delivered oxy-clean. 3,200 psi service.
| GMC offers a wide selection of high pressure fittings for modern air and mixed-gas stations. Most fittings are available in plated carbon steel , stainless steel and brass. Service Pressures: 5,000 psi for steel / stainless. 3,000 psi for brass. Uses: Steel for normal compressed air applications, stainless for harsh marine enviroments. For oxygen / Nitrox service, use brass or stainless, but NEVER carbon steel (rusts). Threads: All fittings are 1/4” NPT or #4 JIC as denoted. Ordering: INDIVIDUAL STOCK NUMBERS INDICATE FITTING TYPE AND METAL AS DESCRIBED. NOTE: None of the fittings on this page come oxygen cleaned.
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Poseidon ODIN/XSTREAM hoses, Black. Supplied with relief end cap. | The products shown below are used to check the pressure within scuba tanks. Models for both DIN and yoke tanks valves are offered. Most utilize a sealed, oil-filled, stainless-cased, 5000 psi pressure gauge for a maximum environmental and shock resistance. All models have a standard screw-type bleeder. NOTE: THESE PRODUCTS ARE NOT INTENDED FOR PURE OXYGEN / NITROX SERVICE: SPECIAL MODELS ARE AVAILABLE | Fish Holder and Cable Stringer, S/S. |
Basic Uniclip with 2 s/s split rings joined by the clip. Hose Uniclip mates the s/s anchor ring to a console hose retainer featuring a non-slip, velcro wrapper. | Check out these bag closeouts and overstocks. Color requests are taken but may not always be available. If ordering online put your request in the notes portion at the end of the order. | These air transfer devices, also called cross-overs, are used to equalize pressure between two dive cylinders. Each unit has a 2-foot, 5,000 psi service hose and a bleeder vent on one end. Both DIN and standard / yoke-mode types are offered. CAUTION: THESE PRODUCTS ARE NOT INTENDED FOR PURE OXYGEN / NITROX SERVICE! SPECIAL MODELS ARE OFFERED FOR THAT PURPOSE. |
GMC offers the industry’s largest variety of regulator port adapters and hose converters for instrumentation installation and TEK diving applications. Reminder: The actual configuration of an adapter is a “mirror image” of its use. A 3/8” FEMALE port requires a 3/8” MALE adapter etc. In TEK diving operations where many fittings may get co-mingled, be sure that all adapter combinations can accommodate the intended flows and pressures. | | Equipment specifically for mixed gas/O2: brushes, Christolube 125, UV lights, media, chemicals and stickers. |
Oxygen Pressure Hose - It is UNSAFE to use standard thermoplastic air hoses for pure oxygen / oxy-rich mixtures! Teflon-core hoses with stainless steel braid reinforcement and brass end fittings should be utilized for such gases. Our hoses have a 3,000 psi working pressure with a 12,000 psi burst. End fittings are female 1/4” NPT. Oxygen High Pressure Hose - With a thicker Teflon-core and an extra stainless steel overbraid, GMC hi-pressure oxygen / mixed hose is related for 4,500 psi service. Female #4 JIC fittings on each end, except as noted.
| | GMC is cleaning out overstock, discontinued, and sample merchandise. All items are new or reconditioned as stated and carry a standard one-year warranty. Quantities are limited and some are one-of-a-kind items available on a first-come, first-served basis. ALL SALES ARE FINAL! |
GMC offers the industry’s largest variety of regulator port adapters and hose converters for instrumentation installation and TEK diving applications. Reminder: The actual configuration of an adapter is a “mirror image” of its use. A 3/8” FEMALE port requires a 3/8” MALE adapter etc. In TEK diving operations where many fittings may get co-mingled, be sure that all adapter combinations can accommodate the intended flows and pressures. | These adapters convert any regulator 2nd stage hose to a BC hose, thereby eliminating the need to stock replacement BC / drysuit hoses. | Devices to fill paintball tanks with compressed air from scuba air stations and commercial cylinders. |
A variety of bags for your snorkel & scuba gear, and for various specialty dive applications. | A selection of dive flags, surface support floats, covers and tow lines, plus marker buoys. | Nylon belts, buckles, weight stops and webbing; lead shot pouches and block molds. |
Pliable rubber, open-heel flippers. Power Fins for scuba diving and snorkeling. Turtle Fins for dry suits and rescue / survival garments. | A selection of straps for fins, masks, and snorkels, plus a variety of retainers for scuba gear and accessory devices. Rubber and velcro types. | Spearfishing Accessories.
Pole Spears with cases. Spear points. A large inventory of rubber slings and tubing for spearguns, hand spears, and other dive applications. |
Protective covers and plugs for tanks and valves. Regulator mouthpieces and hose sleeves. Tank shields, boots, and stickers. BC hose accessories and adapters. | Mask defog, wet suit glue and thinner, silicone grease and spray. | Lift bags, underwater tow sleds, protective air hoods, stickers and dive harnesses. |
Flowbenches, workstations, and other modular instruments for testing regulators and valves. Pressure test chambers for checking dive instruments and validating watertight integrity. | Instruments for checking scuba tank pressures and crossover devices for equalizing pressure between air cylinders. | Custom and standard hoses for scuba regulators, instrument consoles, and buoyancy control devices. Hose repair kits. Regulator port and hose adapters, swivels and safety valves; gas switcing blocks. |
A variety of hand tools for the repair, cleaning, and calibrating of scuba equipment, including regulators, tank valves, and BC's. | Buna N and Viton O-Rings in bulk or kits. Lubricants, cleaning solvents, tie wraps, oxygen-compatible greases for scuba repairs. |  Machines, solvents, and accessories for successful cleaning of scuba gear by ultrasonic methods. Perhaps the most effective way to clean small parts including those from scuba regulators / valves is by ultrasonics. This requires a special machine which generates high-frequency vibrations (beyond the range of human hearing) within certain liquid solvents. Forceful bubble impulsions bombard virtually every surface of any material submerged in the liquid; this cavitation literally blasts the contaminants off the parts, producing a state of microscopic cleanliness! It silently removes grime, rust, oil, dyes and grease from metals, ceramics, glass, plastics, rubber and synthetic fibers. However, ultrasonics can be harmfull to some composite materials and a few elastomers, so manufacturers’ manuals should always be consulted with regard to compatibility. Because this process cleans so thoroughly, it’s an approved method for oxygen cleaning.
Another virtue of ultrasonic cleaning is that the vibrations can be passed at undiminished strength from one liquid to another. Thus, if water is placed in the tank of the machine, the cleaning activity will be transmitted to any solvent contained in an auxiliary pan or vessel placed into the water. If one has extra pans of selected solvents, a single machine can utilize a variety of cleaning agents by merely exchanging pans! All GMC cleaners can employ this reciprocating pan system and we recommend it when acidic solvents must be used. (Each machine includes detailed instructions on ultrasonic cleaning).
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Equipment for the internal cleaning of scuba tanks including tumbler machines, washers and dryers, and cleaning media. Tank whips, bottom brushes, and thread cleaners. | Equipment for removing, inspecting, and testing tank valves, plus internal inspection materials: VIP lights and stickers, mirrors, thread inspectors, and pit gauges. | Filter Towers, canisters, and disposal cartridges. Air quality monitors and sensor disks. Bulk filter cheicals. Air processing controls and accessories. |
A selection of popular oils for the production of certified scuba air and specialty mixed gases. | Equipment for air stations, compressors, gas storage and transfer systems, including CGA hardware, manifolds, valves, pressure fittings, gauges, and regulators. | Whips, hardware, and adapters for filling scuba tanks and SCBA units, plus a variety of replacement components including custom pressure hoses and stainless tubing. |
Supplies and hardware for oxygen cleaning, hyper-filtering air, transferring and analyzing gas mixtures, and constructing blending and storing systems for specialty gas mixtures. | Manual blending manifolds, gas-mixing panels, and various components for production of Nitrox and Trimix. Oxygen-clean gauges. Compressor-assisted blending systems (STIKS). |