Floor Drain P Trap Installation

This project assumes that you are installing the drain in a floor set on joists so that access below usually a basement crawlspace or a lower floor is available.

Floor drain p trap installation. Problem is the p trap almost touches the bottom of the joist cavity and is likely to freeze being very close to the exterior of the house. Smith manufactures a full line of floor drains and devices that are easy to install and cost effective including variations for heavy duty drains with adjustable strainer heads special purpose drains traffic drains planting area drains trap seal primers devices and more to suit any construction need. As water drains down the steep slope at the wye it can create a siphon effect such that water will be sucked out of the trap. In this video i am replacing a floor trap in a basement.

The water flows vertically down a short initial section of abs pipe below the floor then through a p trap and out to the sewer main via branch drain lines within the house. In some instances however the drain pipe rises up from under the sink and it used to be the practice to connect the fixture to the drain with an s trap. Look at how i installed the drain so it has a vertical riser that allows you easy access to the p trap. Connecting a trap to a vertical drain with a wye fitting and a 45 degree elbow seems like a good idea.

That capped pipe is flush with the concrete floor now that the slab is in place. If i install a trap inside the house proper a running trap freezing will not be an issue. The floor drains in older homes were piped in almost all cases with a simple p trap just like you might find under your bathroom sink. The floor joists are 2 x 10s and the joist cavity is insulated.

Tips on replacing a sagging pipe under the floor when dealing with extensive plumbing problems it s important to consult a professional to ensure proper repairs and safety measures. The floor trap is part of the drain assembly of a basement drain. In addition i made sure the drain line leaving the floor drain on the right was a straight shot into the p trap for the same reason. And the empty trap will allow sewer gas to flow into your home.

The u shaped pipe under the drain created a water seal but.