Can A Washer And Toilet Share The Same Drain?

You may consider reducing the number of pipelines in your home by combining two or more drainage systems. But is it okay to have the same drain for a washer and a toilet? We've researched this topic, and here is the answer.

It is not advisable to drain the toilet via a washer drain since the washer drain often has a smaller diameter than that required for toilet drains. However, you can drain the washer through a toilet drain; you only need to add the necessary pipeline to connect them.

Stick around as we discuss further the dynamics of a shared drain between the toilet and the washer. We will also tackle other related queries, such as why your toilet may gurgle when you drain the washer.

Can A Washer And Toilet Share The Same Drain?

modern bathroom shiny white cabinets washing

There is a lot to consider when putting together the drains in a home. For this reason, different rules have been formulated to guide homeowners to avoid problems caused by wrong plumbing systems. One such consideration is whether the washer and toilet can share a drain.

The drain pipe's diameter will determine whether to use the same drain for the toilet and washer. Typically, a toilet drain must have a three to four-inch diameter, while a washer drain's diameter is only two inches.

So, you can connect the washer to a toilet drain since the toilet drain is wide enough to accommodate the washer. However, it is not prudent to channel toilet waste via a washer drain.

Disadvantages Of Having The Same Drain For Your Washer And Toilet

modern bathroom shiny white cabinets washing machine, Can A Washer And Toilet Share The Same Drain?

Although combining your washer and toilet drain can save you money, this approach has some disadvantages. Problems like those discussed below may arise when you connect the toilet to a washer drain.

Possible Clogging

If you plan to add a toilet drain to an existing washer drain, you will surely experience a sewage clog in the future because the washer drain's diameter is too small for the toilet. Moreover, your plumbing system will also not be up to code.

Due to constant clogging, improper plumbing can make your toilet and washer drain unusable. Consequently, you may incur a lot of unplanned spending because of repairs and frequent requests for a plumber to visit.

Unsanitary Waste Disposal

If you connect the toilet drain to your washer, the waste from your toilet will undoubtedly end up where your washer's sewage goes.

Unfortunately, some homeowners direct their washer's sewage to the ground. It is unsanitary to dispose of human waste this way since it can cause ground pollution and health hazards.

How To Unclog A Washer Drain Using Baking Soda And Hot Water

hand plumber holding broken flexible drain

Aside from being every homeowner's go-to product for naturally removing molds and mildew around the house, baking soda is also a great product to use when removing clogs.

If your washer shows signs of clogging, one of the best remedies is pouring baking soda and boiled water into the drain.

Here is a step-by-step guide to ensure you perform this home remedy correctly:

  1. Mix a pack of baking soda into a bucket of hot water.
  2. Detach the hose from your washer's drain.
  3. Using a funnel, carefully pour the mixture into the drain.
  4. Cover the drain with a drain plug and leave it for 5-10 minutes.
  5. Grab a bucket of tap water and pour it down the drain to see if it is still clogged.
  6. If so, repeat the process until the drain unclogs.

Why Does My Toilet Gurgle When I Drain My Washer?

drain shower on the bathroom floor toilet

Your toilet may gurgle whenever you drain your washer for several reasons. Here are some possible explanations.

Your Washer And Toilet Share The Same Drain

One of the most prevalent reasons your toilet gurgles when you drain your washer is that they share the same drainage system and vent pipe. If there's a clog in one of the pipes connected to your toilet and washer, your toilet may gurgle.

Blocked Vent Pipe Or Stack

Sewer and drain pipelines have vertical pipes called vents that allow gas and air to pass through without interrupting the water flow in the system. When the vent pipe is blocked, you will experience problems in your plumbing system. Thus, causing your toilet to gurgle.

To unclog a blocked vent pipe, follow these simple steps:

  1. Climb up the roof.
  2. Cover the vent with your hand and have someone flush the toilet so you can check the suction. If there is no suction, then there is a blockage.
  3. Using a plumber's snake, remove the blockage.
  4. Use your garden hose to flush out the rest of the blockage.
  5. Cover the vent again with your hand and ask someone to flush the toilet to assess if the vent is working correctly.
  6. Add a screen on the vent to prevent possible obstructions from getting inside the vent pipe.

Check out this plumber's snake on Amazon.

Your Washer Is Pushing Air Towards The Toilet's Pipeline

If your washer and toilet are connected, the air from your washer's piping may be trying to escape or getting pushed toward the closest airway. In most cases, the toilet is the closest airway.

To prevent the air from your washer from escaping through your toilet's pipeline, consider doing the following:

  • Try to use a plunger to release pressure in the pipeline.
  • Check the main sewer line and see if any blockages are causing air to go through the toilet's pipeline instead.
  • Clear the roof vent stack from any obstruction. Also, consider adding a screen to prevent debris from falling inside the vent.

Can A Washer And A Shower Share The Same Drain?

brand new bathroom interior design luxury

Your washer and shower can share the same drain as long as you follow your area's standard code for plumbing. Consider the venting pipes you have to connect to your washer and shower and the size of the pipes for the drainage system to avoid possible clogs in the future.

Like the washer, the standard diameter for a shower drain is two inches. So, the washer and shower drains are compatible in size. However, you must ensure a venting pipe is connected to both pipelines to keep the water flowing.

Should My Washer Have A Standpipe?

If your washer can have a dedicated drain, it is recommended to have a vented standpipe. Standpipes are freestanding or built-in rigid piping systems. The standpipe allows the washer to have a proper draining system without having multiple clogging problems.

Can You Put A Washing Machine Inside The Bathroom?

If you don't have a laundry room at home and want to maximize your space, you can put the washing machine in your bathroom since the washer and the shower can share the same drain.

That said, carefully consider where to place the electrical sockets to avoid electrical hazards. You have to ensure that the electrical sockets are in an area where they won't get wet easily.

Also, washing machines often have parts that are prone to rust. So, because bathrooms are often damp, the bathroom moisture can cause the washer to rust faster.

But you can use a dehumidifier to reduce the humidity within the bathroom, thus protecting your washing machine from corrosion and reducing the risk of molds and mildew growth.

See this Pro Breeze Dehumidifier on Amazon.

Final Thoughts

modern bathroom shiny white cabinets washing machine

Your washer and toilet can share a drain if you follow the basic plumbing codes that help you to avoid problems. However, it is best to seek a professional's opinion if unsure what to do.

Before you go, don't forget to check out these posts, too:

LG Washer Won't Drain – What To Do?

Do Toilets Lose Flushing Power Over Time? [And How To Increase Flush Pressure!]

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