P Trap Under Bathroom Sink Plumbing Diagram

Water runs down the sink drain into a p trap so called because it s shaped like the letter which fills up with water to prevent sewer gases and odors from getting into the house through the pipe.

P trap under bathroom sink plumbing diagram.

This diagram of a typical dwv system is called a plumbing tree. Insert a trap nut over the sink drain tailpiece with the threads facing down insert a plastic ferrule washer beveled edge down under the nut onto the sink tailpiece. The other end of the p trap can slide into and out of the fitting on the wall. This makes our bathroom sink drain 1 5 the vent 1 5 the trap arm 1 5 and the p trap 1 5.

Bathroom sink trap installation. Looking up at the basement ceiling it looks like the bathroom sink and the kitchen sink also drain into this line and i know both those sinks have p traps directly under them. It s called the p trap and it starts the sewage ventilation process. With your pedestal sink on the wall you can install the p trap.

You ve opened up the cabinets under a sink before to see the p shaped tube directly underneath the drain right. It rotted out and i m looking to replace it with a pvc solution. But now with the basement p trap leaking sewer smell is present at the kitchen sink and in the bathtub. Here s how to connect the plumbing under your bathroom sink.

The u shape of this pipe is the trap that retains enough water to prevent sewer gases from entering the bathroom. The plastic washer will hold the trap nut in place while you install the rest of the trap. This water gets refreshed whenever more water runs through it.