Fire Protection · F-R776H

Fire Protection In-Building Riser Assembly

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A 4-inch vertical system connects to an incoming 6-inch polyvinyl chloride or ductile iron underground feed via an Ames stainless steel in-building riser assembly. The vertical main incorporates a thrust block at the base bend, a 2-inch annular clearance around the pipe passing through finished floor and grade levels, 4-inch flexible grooved couplings, a flow switch, a hydraulic calculation sign, a 4-inch butterfly valve with tamper switch, a 4-inch check valve with a 2-inch main drain, a grooved end transition, a spare sprinkler cabinet with wrenches, and a 10-inch electric bell positioned above.

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