How to Vent a Washing Machine Drain Pipe – A Complete Guide

Is your washing machine not working? Or your washing machine still has water in it that won’t come out! It is very common that you don’t need to worry about it. Today we will discuss how to vent the drain pipe of a washing machine. There could be many reasons for that so keep reading to see what yours is.

How to Vent a Washing Machine Drain Pipe

The best way is to run your washing machine’s drain pipe into the plumbing vent stack, or you can simply install a separate vent stack. Either way, it’s important to make sure the vent stack is properly sized and properly installed to prevent any problems.

The most common solution to venting a washing machine drain pipe is to install a standpipe that connects to a P-trap and a standpipe drain.

Before delving deeper into this topic, let’s look at how all washing machines actually drain. Some of you know that a washing machine is a very complex machine that contains complex systems.

First, when the wash cycle is complete, the pump pumps the water out of the tub and then finally into the washer drain hose. The standpipe is located between the hot and cold water valves.

In some cases you may cause a malfunction during the entire process. Then the washing machine won’t rain and water can back up or even leak onto the floor.

I have found one video that will really help you out on how to install a washing machine drain stand pipe.

Things You’ll Need to Rent a Washing Machine Drain!


As I mentioned, the standpipe is located near the hot and cold valves. It is a horizontal pipe that connects the washer to the drain.

P trap

This is the most important thing to ensure that the water does not stagnate.

Cheater Valve

This helps create negative pressure by opening the valve to allow air to enter the line with the flowing water.

How much will it cost?

This really depends on the condition of your washing machine. If you are doing it yourself it will be cheaper if there is a major reason you will need a professional. A plumbing service costs between $200 and $2,000 at most.

When should I call a professional?

If you notice that your washing machine is not stable and makes noise then I think it is time that you should call a professional plumber. If you notice a musty or foul smell coming from your washing machine, you can also call a professional plumber for a deep cleaning.

How to keep the system clean

The most common blockage problem is a link in the pipe. You must keep your pipes clean using a lint remover that can be purchased at your local store.


Always seek professional and licensed plumbing professionals when performing any plumbing upgrade or repair. They may charge you more but they are worth it. Keep visiting My Architecture’s Idea for more updates.

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Rahul Joshi

Rahul is the founder of My Architecture's Idea and has a passion for writing. He is from India and has been helping businesses grow for 3 years. Follow him on Instagram, Linkedin and Facebook

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