Grooved Concentric Reducer | GemLock® | 6 in. x 5 in. | Style 140

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GemLock Grooved Concentric Reducer

This Grooved x Grooved Concentric Reducer features one 6 in. and one 5 in. connection to be used in grooved piping, including specifically fire sprinkler piping systems, allowing for proper water flow and fast installation. Concentric Reducer uses include transitioning two pipes with different diameters by joining the two pipe or tube sections together on the same axis. This grooved fitting is available in the following sizes:

2 in. x 1 in., 2 in. x 1-1/4 in., 2 in. x 1-1/2 in.

2-1/2 in. x 1-1/2 in., 2-1/2 in. x 2 in.

3 in. x 1 in., 3 in. x 1-1/2 in., 3 in. x 2 in., 3 in. x 2-1/2 in.

4 in. x 2 in., 4 in. x 2-1/2 in., 4 in. x 3 in.

5 in. x 2 in., 5 in. x 4 in.

6 in. x 2 in., 6 in. x 2-1/2 in., 6 in. x 3 in., 6 in. x 4 in., 6 in. x 5 in.

8 in. x 3 in., 8 in. x 4 in., 8 in. x 5 in., 8 in. x 6 in.

10 in. x 4 in., 10 in. x 6 in., 10 in. x 8 in.

You can select your preferred size from the “Options” section at the top of this product page. Accessories compatible with this grooved concentric reducer 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 Concentric Reducer  FireLock Style 50. Gruvlok fitting equivalent: 7072 Grooved Concentric Reducer.

GemLock Standard concentric pipe reducers 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 Grooved Standard fittings are tested to a maximum operating pressure of 500 PSI*.

*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 Concentric Reducer Listings, Approvals, and Other Information

Each reducer is made by GemLock, a New York-based manufacturer of fire sprinkler grooved pipe 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.

All GemLock Ductile Iron 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.

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.

Manufacturer Part Number:
Concentric Reducer
Style 140
6 in. x 5 in.
Size Detail:
6 in. Grooved x 5 in. Grooved
UL Listed:
FM Approved:
Rated Working Water Pressure:
500 PSI
4.02 in. (102.11 mm)
4 lb. (1.81 kg)
Available Box/Pack Quantity:
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