QA

Question: How To Install P Trap Under Bathroom Sink

Do bathroom sinks have P traps?

Beneath a kitchen or bathroom sink drain is a pipe with a sharp bend in it. You must have a p-trap installed under your sink if you want your home to pass inspection in many places, where the building code requires them.

What is the difference between a J bend and a p-trap?

The J-bend beneath the sink is also referred to as the P-trap, the U-bend and sometimes even just the drain trap. In some cases, however, hand-tightening may not seat the washer correctly, particularly if your drain pipes are metal, so slip-joint pliers will often come in handy.

Where is the p-trap in sink?

In a nutshell, a p-trap is a u-shaped bend in the waste pipe that connects a sink’s drain to a home septic tank or to a municipal sewer system. Under normal circumstances, p-traps always contain some water.

What if there is no p-trap?

Shower lines can be damaged if p-traps are not installed. They have the potential to bring harmful sewer odors into your home. It permits sewer gases to back up into your home through the drain. Since there are no p-traps in the shower, the dirt and debris or other solids won’t be caught.

Does p-trap have to be directly below drain?

The “P” trap SHOULD be directly under the drain, but no more than a few inches off center of it, if conditions require it. NO trap, TWO traps, and/or a 9 foot offset are NOT allowed and if he suggests any of them get a different installer who is a REAL plumber.

Can p-trap be lower than drain pipe?

It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally. They both work and have seen it many times. But essentially anything below already creates its own p-trap- so using another is redundant.

How do I know what size p-trap to get?

If you have 2.5 inches from the bottom of the tailpiece to shelf and 0.5 inches from the drain to shelf you can use CP-trap. First you have to cut 2.5-2.0 inches from the end of the tailpiece. The height of the p-trap is 4.5 inches 5-2.5=2.5 inches or 4.5-2.5=2.0 inches.

What is a J trap?

A J-trap is also commonly known as a P-trap, S-trap or S-bend. This is the U-shaped pipe under a sink that keeps sewer gases from entering your home. The terms are interchangeable, and parts may be labeled one or the other. Common problems with a J-trap include leaking, misalignment or breakage.

Which is better P trap or S trap?

P-traps are generally considered by most to be more effective and consistent in maintaining water trap compared to S-traps. Their design makes them less vulnerable to drying out and losing seal: a properly installed P-trap will never lose its water seal.

What is a trap adapter?

A trap adapter is the fitting that joins the pipe to the tubing at the trap arm side of the p-trap. A slip joint is comprised of a male thread, a slip joint washer and a slip joint nut. Historically when a brass trap adapter had no slip joint the tubular trap was soldered into the trap arm side of the adapter.

Do you need to glue PVC drain pipe?

If you are trying to use PVC pipe to transport fluid or gas, PVC cement or special push-on fittings are necessary to assure there are no leaks. Not all applications require a permanent seal like this, however. Putting cement on all of these PVC joints could be time-consuming and messy.

Do you glue sink plumbing?

Most modern bathrooms contain plastic drain pipes made out of PVC, or polyvinyl chloride. This material transports nonpotable water down sink drains and other plumbing fixtures. Gluing your PVC pipes creates a much stronger and permanent hold that can only be broken by cutting off the pipes.

Is my P-trap clogged?

A blocked p-trap will cause water backflow to occur. The first sign that your p-trap is clogged is when the water in your sink takes longer than average to flow down the sink. In the case of a clogged P-trap, it is best to place a small bucket under the trap with the water shut off.

Is p-trap necessary?

A P-trap is required to be installed in most sink, shower, and bathtub drain lines by law. The reason P-traps are so essential is because they retain clean water in the drain line. This water seal stops horrible-smelling sewer gas from coming back up the drain line and into your home.

What do you do if your shower doesn’t have ap trap?

Run water in the sink, then go over to the shower drain and listen. If you can hear water draining from the shower drain location, there is no p-trap. Normally for a shower, you will see the water directly below the drain grid.

Does every drain need a trap?

Having said that, any plumbing fixture directly connected to the sanitary drainage system must be equipped with a water seal trap. That means every single plumbing fixture used to evacuate waste from a building should have its own plumbing trap.