A two-inch drain line from the sprinkler drain valve connects into a six-inch pipe above a four-inch by six-inch reducer. The assembly includes a four-inch trap positioned six inches above the finish floor, extending to a four-inch tee and a four-inch soil waste pipe with a two-inch vent.
2" FROM SPRINKLER DRAIN VALVE 6" PIPE 4" TRAP 2" VENT 4" TEE 4" SOIL FINISH FLOOR 4" X 6" 6" 2'-0"
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