Grooved Flexible Coupling | GemLock® | 8 in. | Style 12

GemLock Grooved Flexible Coupling

This Grooved Flexible Coupling features a 8 in. grooved connection to be used in grooved piping, including specifically fire sprinkler piping systems, allowing for flexible pipe union at every joint to promote proper water flow and fast installation. This flexible coupling is available in the following sizes:

1 in. 1-1/4 in., 1-1/2 in., 2 in., 2-1/2 in., 3 in., 4 in., 5 in., 6 in., 8 in., 10 in.

You can select your preferred size from the “Options” section at the top of this product page. Accessories compatible with this grooved coupling include other GemLock grooved fittings and Pipe Joint Lubricant.

GemLock is a leader in the grooved pipe market – their grooved fittings are reliable and faster to install than welding threading, or flanging, resulting in drastically lower installation costs comparatively. GemLock grooved fittings provide a clean, consistent, and strong connection for optimal water flow when used with compatible products. The Victaulic pipe fitting equivalent to this product is the Victaulic Grooved Flexible Coupling Style 77. Gruvlok fitting equivalent: 7001 Flexible Coupling.

GemLock couplings are full flow design, made of durable, high-strength ductile iron conforming to ASTM A536, with every lot metallurgically tested for compliance. Pressure Ratings of GemLock flexible couplings are tested to a maximum operating pressure of 300/400 PSI*.

*Please refer to datasheet for maximum pressure – amount varies according to size. Maximum pressure includes surges and maximum end loads from all internal and external forces, to which a joint could be subject under normal working conditions. This rating provides a nominal safety factor of 1.5 times working pressure based on standard weight steel pipe. Maximum working pressure may be subjected to a one-time field test of 1.5 times the figures indicated.

GemLock Grooved Flexible Couplings Listings, Approvals, and Other Information

Each flexible coupling is made by GemLock, a New York-based manufacturer of fire sprinkler grooved pipe couplings and fittings, HVAC, plumbing and grooved tubing. All GemLock grooved piping system fittings are UL Listed and FM Approved. Refer to installations and groove specifications when assembling any grooved product. This flexible coupling conforms to the requirements of ANSI B31.1 Power Piping Code, ANSI B31.9 Building Service Pipe Code and NFPA 13 Sprinkler Systems.

All GemLock Ductile Iron pipe fittings conform to ASTM A536 Grade 65-45-12. Allowable pipe end separation is for cut groove pipe for roll groove; figures will be one-half of the values listed at time of initial pressurization. The gasket included with this product is constructed of specially compounded rubber polymers with low compressions set properties. The sealing efficiency of gaskets is such that the gasket forms an initial seal as it is stretched over the pipe ends. As the housing segments are installed, the gasket seals to create a leak-tight joint. The seal becomes even stronger from internal downward pressure on the lips of the gasket. The gasket seals under vacuum conditions up to 10inHg (-0.35 Bar). Gaskets are pre-lubricated at a minimum but should be lubed more for ease of assembly and optimal performance. For lubricant, refer to the accessories on this product page.

Certain GemLock product families and all GemLock Grooved fittings 8 in. and larger are only available upon request and are not available for immediate shipping.