OATEY 704-1 P-TRAP 1.5, 17 GAUGE

The Oatey 704-1 is a 1-1/2 inch P-trap, so it mates with 1-1/2 inch tubular drain components, which is the standard tubular size for kitchen sinks and most commercial lavatory and utility sink drains. If your tailpiece and wall stub are 1-1/4 inch (common on older residential bathroom lavatories), this is the wrong size and you would need adapters or a 1-1/4 inch trap instead.

Gauge is the wall thickness of the tubular body, and lower numbers mean thicker walls. The Oatey 704-1 is a 17 gauge trap, which is the heavy-wall tubular spec commonly specified for commercial and institutional work, as opposed to the thinner 20 and 22 gauge traps typically sold for light residential use. For school, hospital, hotel and multi-family fixtures where traps get cleaned out repeatedly and slip nuts get retightened, 17 gauge is the spec you want to hold.

Order Oatey 704-1. It is a single-model item with no finish or size options to choose from, so there is nothing else to specify on the purchase order. Spec it once at 1-1/2 inch, 17 gauge, and every opening matches. Confirm your fixture tailpieces and wall stubs are 1-1/2 inch before you standardize on it.

A P-trap like the Oatey 704-1 turns horizontally into a wall stub-out, which is what nearly all modern plumbing codes require, because the horizontal arm keeps the water seal from siphoning out. S-traps discharge straight down through the floor and are not accepted for new work in most jurisdictions. Bottle traps are a decorative exposed option used mainly on wall-hung lavatories. For a wall drain connection, the P-trap is the one to use.

Each 704-1 P-trap is listed at 1.2 in product weight. That matters when you are pulling a pallet quantity for a multi-unit rehab, since traps are one of the items ordered by the case rather than by the piece.