Fire Protection · F-YJHP2

Fire Water Service Entrance Detail

Materials

Elements

Walls Stairs Floors / Slabs Drainage Entrances Connections / Plates

About this detail

An incoming fire water service enters through the concrete floor slab within an eight-inch and ten-inch pipe sleeve resting on compacted subgrade. The assembly incorporates an OS&Y gate valve with a tamper switch on both sides of a six-inch double check backflow preventer. A backflow preventer test outlet features three two-and-a-half-inch valve outlets with cap and chain, complete with wall plate escutcheons marked 'BFP TEST'. Downstream piping routes through an ACV assembly, flow switch, and an FDC connection into the wet pipe riser heading to the fire sprinkler system. A two-inch main drain extends through the exterior wall and terminates with a forty-five degree open-ended elbow, while the entire assembly is supported above the finished floor by floor-mounted pipe supports.

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