How To Make A P-Trap – A Step-By-Step Guide

Are you facing a plumbing problem where you need to raise a P-trap in a joist bay in your basement?

Or maybe you want to relocate an existing underfloor P-trap in your bathroom?

Whatever the case may be, standard plastic P-traps from home depot may not always be the solution.

But don’t worry, you can construct your own P-trap using elbows and a piece of drain pipe.

In this article, we’ll guide you through the process of making a P-trap that fits exactly where you need it to go.

So let’s get started!

How To Make A P-trap

To make your own P-trap, you’ll need a few supplies. First, you’ll need 50mm elbows and a piece of drain pipe.

Start by measuring the distance between the bathtub and the rest of the drain system. Cut the drain pipe to the appropriate length, leaving enough room for the elbows to fit on either end.

Next, attach one elbow to each end of the drain pipe. Make sure they are facing in opposite directions, so that the horizontal part of the P-trap can fit through the existing joist hole.

Now, connect one end of the P-trap to the bathtub and the other end to the rest of the drain system. You may need additional fittings or connectors depending on your specific plumbing setup.

Once everything is connected, test your P-trap by running water through it. Make sure there are no leaks and that water is flowing properly through the system.

Understanding The Function Of A P-trap

A P-trap is an essential component of any plumbing system that uses a drain and accepts sanitary waste from tubs, showers, and sinks. The main purpose of a P-trap is to trap noxious sewer gases inside the wastewater system so that they can’t rise back up through the drain. This is achieved by the shape of the trap, which creates a barrier that seals off the pipe so that the smelly sewer gases can’t escape.

In addition to blocking bad smells, the P-trap also helps prevent your drain line from being clogged. Any food or other solid particles you wash down the drain usually stay inside the bend in the P-trap. If your sink is clogged and won’t drain, the clog is usually located inside the P-trap itself. This makes unclogging the P-trap generally far easier than removing an obstruction further down inside the drainage system.

It’s important to note that plumbing codes require a P-trap be installed anywhere there is an open drain line that expels wastewater into a drain waste-vent system. The P-trap also stops sewer gases from backing into your home through the drain line, which can be harmful to your health.

Most modern homes have P-traps under each toilet, sink, shower, and bathtub. If you’re building or renovating your home, it’s important to ensure that your plumbing system includes P-traps to prevent unpleasant odors and potential health hazards from entering your living space.

Gathering Materials And Tools

Before you start making your own P-trap, it’s important to gather all the necessary materials and tools. Here’s what you’ll need:

– 50mm elbows

– Drain pipe

– Additional fittings or connectors (if needed)

– Measuring tape

– Hacksaw or pipe cutter

– Pliers or adjustable wrench

Make sure to measure the distance between the bathtub and the rest of the drain system accurately, as this will determine the length of your drain pipe. You’ll also need to use a hacksaw or pipe cutter to cut the drain pipe to the appropriate length.

Once you have your materials, attach the elbows to either end of the drain pipe, making sure they are facing in opposite directions. This will allow for the horizontal part of the P-trap to fit through the existing joist hole.

Finally, connect one end of the P-trap to the bathtub and the other end to the rest of the drain system using pliers or an adjustable wrench. Test your P-trap by running water through it and checking for any leaks or issues with water flow.

Assembling The P-trap With Elbows

Assembling the P-trap with elbows is a relatively straightforward process. First, place a 90-degree elbow with a slip-to-slip end on a table. Match one end of the elbow to the waste bend’s slip nut opening. Slide the nut and the ring over the end of the elbow that is aligned with the waste bend pipe. Insert the slip nut into the waste pipe opening and point the elbow’s opposite end toward the right. Thread the nut on by hand until it is secure.

Next, take another 90-degree elbow and attach it to the open end of the first elbow. Make sure it is facing in the correct direction to connect to the rest of your plumbing system. Slide the nut and ring over the end of this elbow and insert it into the next pipe opening. Thread the nut on by hand until it is secure.

Repeat this process until you have created a U-shaped P-trap with elbows. Make sure all connections are tight and secure, and that there are no leaks.

It’s important to note that while this method can be a viable solution for some plumbing problems, it may not be suitable for all situations. If you’re unsure about whether or not constructing your own P-trap is appropriate for your plumbing needs, it’s best to consult with a professional plumber.

Testing And Adjusting The P-trap

After you have installed the P-trap, it’s important to test and adjust it to ensure that it is functioning properly. Begin by running water through the drain system and checking for any leaks. If you notice any leaks, tighten the slip nuts on the P-trap until they are snug.

Next, check the flow of water through the P-trap. If the water is not flowing smoothly, adjust the trap arm inward or outward until it is aligned with the drainage opening. You may need to loosen the slip nut on the tailpiece or trap bend to make these adjustments.

If the trap arm is too long for your specific plumbing setup, you may need to cut it down to size using a PVC cutter or hacksaw. Some P-trap kits come with trap arms of various sizes to make installation easier.

Lastly, make sure that all slip nuts and washers are tightened in an alternating manner until they are securely in place. This will prevent any future leaks from occurring.

By following these steps, you can ensure that your DIY P-trap is properly installed and functioning correctly.