A two-inch drain line from the fire sprinkler system discharges through an approved air gap funnel located thirty inches above the finished floor. The drop pipe connects to a six-inch cast-iron soil pipe using no-hub couplings with six-band stainless steel clamps and shields. A four-inch P-trap with a one-half-inch primer tap and a one-half-inch trap primer line ties into a sanitary tee and a four-inch wye with a cleanout. A two-inch relief vent extends upward along the wall from a reducer above the wye. The main four-inch cast-iron line routes through the floor slab with caulking all around and turns via a long sweep cast-iron bend.
1/2"TP LINE FROM TRAP 30" FINISHED FLOOR NO-HUB COUPLING WITH 6-BAND STAINLESS STEEL CLAMP AND SHIELD (TYP.) 4"WYE SAN TEE CAULK ALL AROUND CLEAN-OUT 4" P-TRAP W/ 1/2" PRIMER TAP 2" RELIEF VENT 4" LONG SWEEP C.I. BEND 6" C.I. SOIL PIPE PROVIDE AIR GAP FUNNEL 4" C.I. UP ALONG WALL REDUCER REFER TO DETAIL 1/P604 (TYP) BY JR SMITH #3955S OR SYSTEM. REFER TO FIRE PROTECTION "FP" DRAWINGS 2" DRAIN FROM FIRE SPRINKLER FOR CONTINUATION. PRIMER VALVE APPROVED EQUAL. 4"S
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