Plumbing · P-T6JTP

Fire Sprinkler Standpipe Drain and Vent Penetration

Materials

Elements

Walls Roofs Floors / Slabs Decks Waterproofing / Flashing Insulation Drainage Anchors / Embeds

About this detail

A bare pipe penetrates the typical roofing assembly and structural roof deck, topped with a vandal-resistant vent cap and governed by a minimum height of zero feet six inches and a maximum height of one foot six inches. Flashing and insulation are coordinated per architectural details, while the deck assembly follows structural roof plans. Adjacent plumbing features a two-inch sprinkler system drain centered over a six-inch cast iron pipe with a two-inch air gap and a cold water supply from a trap primer. The drain drops through a no-hub coupling with a four-band stainless steel clamp and shield, a six-by-four-inch increaser, a four-inch deep seal P trap, a sanitary tee, a four-inch wye with a cleanout, a four-by-two-inch reducer, and a two-inch vent anchored typically to the wall. The assembly transitions through the finished floor into a four-inch long sweep cast iron bend, with caulking applied all around.

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