What is a Washing Machine Standpipe? (Explained)

A standpipe is a vertical pipe that is connected to the washer and goes into the drain. It prevents sewage from coming back up through the drain and into your home.

The average washing machine produces about seven gallons of wastewater per load.

If this wastewater is not properly drained, it can lead to flooding and other problems.

This is where a washing machine standpipe can be very helpful.

Washing machine standpipes are installed to protect your home from flooding and leaking.

In this article, you will have a fair idea of what is a washing machine standpipe and how to install them.

Here’s what this article covers.

What is a Washing Machine Stand Pipe?

A washing machine standpipe is a pipe that is used to connect a washer to a drainage system.

The standpipes are usually made of PVC or other durable material and are available in a variety of sizes.

The most common size is 2 inches in diameter, but standpipes can also be 3 or 4 inches in diameter.

One end is connected to the washing machine, and the other end connects to the drainage.

The standpipe ensures effective draining of your washer and keeps it from vibrating.

It also keeps sewer gas from entering your home which can be harmful to your health.

What are the different types of washer standpipes?

There are two different types of washing machine standpipes, vented and non-vented.

Vented standpipes have a small hole in the top of the pipe that allows air to enter the pipe as water is draining out.

It prevents vacuum formation and prevents water from coming back into the machine.

Non-vented standpipes do not have this hole, so a vacuum can form and water may siphon water back into the machine.

How to Install a washing machine standpipe?

If you are planning to install a washing machine, then you need to ensure proper plumbing for your washer.

That means having suitable standpipe plumbing for the drainage hose.

Here’s a step-by-step Instruction to install a standpipe in the washing machine.

Step 1: Measure the Height of your washing machine

First, you’ll need to measure the height of your washing machine.

The standpipe needs to be at least 6 inches taller than the highest point of the machine.

Next, measure the diameter of the drainage hose.

Ensure that the standpipe is big enough to accommodate the hose.

Step 2: Find a location for the standpipe

The standpipe should be close to the washing machine and it should lead outside the house or to a floor drain.

Once you’ve found a suitable location, mark the spot from where the standpipe will go

Step 3: Install the Standpipe

Start by drilling a hole in the floor where you marked earlier.

If your standpipe needs to go through an exterior wall, then make sure to drill a hole that fits the drainage hose.

Thread the standpipe through the hole and secure it in place with plumbing nuts.

There are grooves inside the pipe to provide a tight fit around them in case of an adjustable standpipe.

Next, drill holes for the anchors in the wall and dry-fit them in place to make sure that it fits correctly.

Once you’re satisfied, attach the anchors and route the pipeline.

Note: Use clamps or cable ties if necessary. It is recommended that you leave a 1/2-inch gap between the standpipe and the wall.

Voila! the installation is been successfully completed.

Now you will need to pour some water through the washer to check for any leaks.

These tasks usually require professional plumbers or if you are well versed with them.

How to choose a suitable standpipe for my washer?

If you’re not sure which type of standpipe to get for your home, don’t worry, we’ve covered that as well.

The first thing to consider when choosing a standpipe is the material it’s made from.

The most common types of standpipes are made from PVC or metal.

Some are made from other materials such as wood or concrete.

Each material has its own advantages and disadvantages.

It becomes important to choose the one that suits your requirements.

PVC standpipes are the most affordable options and are usually easy to install.

They’re not as durable as metal standpipes and can be damaged by high temperatures.

Metal standpipes are more expensive, but they’re durable and can withstand high temperatures.

If you live in an area with extreme weather conditions, a metal standpipe is the better choice.

Another factor to consider is the size of the standpipe.

Standpipes are available in different sizes, make sure to choose a suitable one.

It should meet your house and washer’s plumbing requirements.

Do not miss to consider the requirements of your dispenser.

Before purchasing a standpipe, get your measurements calculated.

Remember, some standpipes have specific configuration requirements to prevent over-filling or overcharging.

Don’t wait any longer to buy a new standpipe if needed.

The lifespan of standpipes ranges around 10 years and up to 20 years or longer.

Considering the facts will ward off any problems that might arise later.

Make sure to choose a dirt-resistant, durable, and sturdy standpipe.

Doing this will prevent any leaks and water contamination in the long run.

When and how often should I clean my standpipe?

A standpipe is a vertical pipe that drains water from your washing machine to the sewer.

It is of utmost importance to keep your standpipe clean to prevent clogs and other issues.

Clean your standpipe every month or so, depending on how often you use your washing machine.

If you have a front-load washing machine, you may need to clean your standpipe more often.

If you notice any unusual behavior with the drainage system such as struggling to drain, unusual gurgling sound, or water coming back into the washer, inspect the drain areas, including the standpipe.

See if the standpipes are clogged, if yes then unclog them.

Final Thoughts

If you have a washing machine in your home, you’ll need to be familiar with standpipes.

A standpipe is a pipe that connects the washing machine to the sewer line.

They come in different sizes, so it’s important to know what size is suitable for your washing machine.

You can usually find this information in the manual that came with your washing machine.

For standpipes, always ensure secure installation and fix them to correct sewer lines.

To ensure proper installation refer to the manuals and hire professional plumbers.

Frequently Asked Questions

Here are some common questions related to Washing Machine Standpipes.

Are drain dose and standpipe the same?

A standpipe does a similar job as a drain hose but is not the same. A standpipe is a vertical pipe that drains water from your washing machine to the sewer. It extends upwards to a height of at least 36 inches. The standpipe uses gravity to drain wastewater from your washing machine. It goes through the hose and into your home’s sewer system or septic tank.

Why do I need a standpipe?

A standpipe is designed to drain the washer’s wastewater through the drainage hose. It helps to pass the water into your home’s sewer system or septic tank.

Is it difficult to install a washing machine standpipe?

Installing a washing machine standpipe is relatively easy. First, you’ll need to buy a standpipe of the correct size for your washing machine. Next, connect one end of the standpipe to the drainage pipe on your washing machine. The other end needs to be connected to the sewer line or septic tank. Finally, secure the standpipe in place with clamps or brackets.

How do I care for my washing machine standpipe?

Caring for your washing machine standpipe is of utmost importance. Once it is installed, you should inspect for any leakage and that the clamps or brackets are still secure. This practice needs to be followed at regular intervals, at least once a month.

How tall should a washing machine standpipe be?

The height varies depending on the floor type, generally, a standpipe needs to be at least 18 inches from the ground. The added benefit of a standpipe is that when it is built, the washer and dryer are no longer resting on the ground.

Why is my standpipe overflowing?

It’s possible that your standpipe is improperly placed, such as against the wall or on uneven ground. It’s also possible that the hose could be disconnected from the actuator valve at the top of the standpipe.

Additionally, if your washing machine does not have a lot of water pressure when you put laundry in the machine, this might explain why your standpipe is overflowing.

Manish Singh is an expert in electrical engineering with a Diploma in the field. With over 12 years of experience, he specializes in repairing music systems, washing machines, dryers, and other laundry-related appliances. His in-depth knowledge in electrical repairs and decent knowledge about garment care makes him a trusted authority in the field of appliance repair and laundry related topics. If you have any questions or need assistance with your appliances, you can reach out to Manish through email: manish.singh (at) portablelaundry.com