A fire sprinkler system test drain is centered over a six-inch cast iron soil pipe anchored to the wall. The vertical drop transitions through a six-by-four-inch increaser, stainless steel couplings, and a trap primer adapter connected to a three-quarter-inch water supply line and a trap primer with an electrical connection. A four-inch deep seal P trap connects to a four-inch wye with a cleanout and a two-inch vent extending upward, while discharging into a four-inch long sweep cast iron bend below the lower level finish floor.
FIRE SPRINKLER SYSTEM TEST DRAIN CENTERED OVER 6" C.I. PIPE ANCHOR TO WALL (TYP) 6" X 4" INCREASER TRAP PRUMER ADAPTER 4" DEEP SEAL 'P' TRAP LOWER LEVEL FINISH FLOOR CLEAN OUT 2" VENT 4" x 2" REDUCER 4" WYE 4" LONG SWEEP C.I. BEND 3/4" S.S. COUPLING (TYP) TRAP PRIMER 115 V. CONNECTION BY ELECTRICAL 3/4" WATER 6" C.I. SOIL PIPE 30"
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