Where is the P-trap in a bathtub?

Author: Cassie Franecki PhD  |  Last update: Wednesday, April 9, 2025

All of your showers, bathtubs and your washing machine also have P-traps down underneath the drain.

How do you unclog a P-trap tub?

This technique can help you reach deeper clogs in the P-trap or drain line:
  1. Remove the drain cover or stopper.
  2. Insert the auger into the drain opening.
  3. Gently push the auger while turning the handle clockwise.
  4. When you feel resistance, continue turning to break up the clog.

What does a bathtub P-trap look like?

P-traps, named after their shape, contain a u-shaped bend that filters wastewater as it enters a plumbing system. The trap is connected to a sink, bathtub, and shower with a J-bend on one end and exits into your drainage system. The J-bend is the section of the p-trap that resembles the letter J.

How do I know if my P-trap is 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.

How do I know if my shower drain has a P-trap?

A trap should be directly beneath the fixture, and there should be one for every fixture. A double sink can be single trapped, but that's the only one. You should be able to use a flashlight and peer into a drain and see water standing. That's the sign of a P trap in place.

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How to check P-trap in bathtub?

You can check the p-trap yourself rather easily. First, look into the drain with a flashlight. You should be able to see some water. If you do not see water, the p-trap water level is likely too low.

How do you unblock a shower P-trap?

Baking Soda and White Vinegar

It is also a relatively simple one – all you need to do is fill a cup with baking soda and pour it down your drain. Once you have done this, wait a few minutes and follow it with a cup of white vinegar. All you have to do now is let it work its bubbling magic.

How do you clean a P-trap without removing it?

Pour some baking soda down your drain and then pour boiling water down after. Sometimes this will clear the clog. Use a plunger on your sink drain to try to force the clog out of the trap.

What if a drain is not clogged but still not draining properly?

Well, if it's not a clogged sink causing the slow drainage, it's probably a plumbing vent issue. Plumbing vents help regulate air pressure in your plumbing system by allowing air to enter the pipes. However, over time, plumbing vents can become clogged with debris, which can lead to slow drainage and even foul odors.

Where is the trap located on a bathtub?

Bath traps, a type of “slab leave-out”, are located under bathtubs. Why leave a big hole under a bath tub? Generally these openings are left for the convenience of plumbing contractors in case the plumbing needs to be moved or serviced.

How much does a plumber charge to replace a bathtub drain?

On average, drain repair will cost between $250 and $1,250 for replacing or repairing drainpipes.

Do all bathtubs have p-traps?

All of your showers, bathtubs and your washing machine also have P-traps down underneath the drain. The P-trap underneath your sink can easily be removed simply by loosening up the fittings at each end. This comes in handy in case you accidentally drop your wedding ring or anything else down the drain.

Why is my bathtub not draining but not clogged?

If your bathtub is draining slowly but isn't clogged, old pipes or a faulty stopper may be to blame. Water cannot always flow freely through old, corroded pipes.

How do you unblock a bath trap?

Start by placing the plunger over the plughole and fill the bath or shower with enough water to cover the plungers head. You should also cover the overflow in the bath with duct tape or block it with the dishcloth. When you're ready, grip the plunger handle firmly and plunge up and down rapidly to create suction.

What will dissolve hair in a drain?

Heat 2 or 4 liters of water on your stove or in a kettle to just short of boiling. Add about 1/2 cup of salt. Try pouring this down the drain, then wait 15 minutes before seeing if it will clear more easily. If you need a stronger cleaning, pour 1/2 cup of baking soda down the drain, then add 1/2 cup of vinegar.

How do I know if my P-trap is bad?

Is your P-trap working properly? If you detect any foul odors near the P-trap that remind you of a smell similar to rotten eggs, then it means that there is hydrogen sulfide present. This, and other harmful gases, bacteria, and viruses, can get into the house if your plumbing trap has malfunctioned.

What does a P-trap look like?

P-traps in sink or toilet drains use trapped water to block sewer gases from entering your home. They get their name by resembling a P that has fallen on its side (the looping part of the P faces down). The main part of the P-trap “” the area that traps water “” has a U shape.

How to unclog a drain past the P-trap?

Pour one cup of fresh baking soda down the drain, followed by one cup of white vinegar. Place a rubber stopper or other sink hole cover over the drain opening. Wait 15 minutes to allow the vinegar and baking soda to unclog your drain, Then take out the drain cover and run hot tap water down the drain to clear the clog.

Where is the P-trap located?

It's shaped like a “P” and can be found under sinks, tubs and showers. A simple device, a P-trap holds just enough water to create an airtight seal that prevents sewer gas from backing up into your home. As you run water down a drain, you're continuously refilling that trap.

Can a drain snake go through a P-trap?

When pushing the cable through the P-trap, the U-shaped pipe section under the sink, you may encounter some friction and resistance. If this happens, push on the cable while cranking the drain snake slowly. A couple of turns will help the cable maneuver through the bends in the pipe.

How do you unclog a bathtub trap?

Unclog Drum Trap

Open the trap slowly, watching for water to well up around the threads. Take your manual or power auger and place it into the drum trap. If the trap is full, work the auger away from the tub toward the main drain. Auger back and forth.

Why is my shower not draining but no blockage?

Slow shower drains are often caused by a slimy buildup of everything that runs down the shower drain: soap and shampoo, dirt and debris, dead skin cells, and hair.

How do I access my P-trap shower?

Use a circular saw to cut away the subfloor to gain access to the P-trap. Make your cuts along the floor joists so that you'll have something to support the new subfloor. You may need to use a reciprocating saw to split the piece in two before prying it up. Cut the old drain pipe just behind the P-trap.

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