Your washing machine drain was improperly installed – Your washing machine drain needs to be the right size, length, and diameter to work correctly. If your washing machine drain was improperly installed, air will never reach the pipes, and your toilet will gurgle.
Your sewer line is blocked – If multiple fixtures in your house are gurgling, there’s a chance your sewer line is blocked. All of your drain pipes, including your toilet and washer machine, are connected to your main sewer line. If your sewer line is blocked, waste, water, and air won’t be able to leave your home. Then, air could flow backwards, causing your toilet to gurgle when you use your washer machine. Read more about when it’s time to replace your sewer line.
Your drains are connected – One of the main reasons your toilet gurgles when your washer machine drains is because your washer machine is connected to the toilet drain. This isn’t uncommon. Your washing machine might have been placed in between your toilet and sewer stack.* If your toilet and washing machine drains are connected, they have the same venting system. This can cause your toilet to gurgle when your washer drains.
*The sewer stack is the largest vertical pipe that connects all the horizontal pipes.
How To Stop Toilet Gurgles When Your Washing Machine Drains
Now that you know why your toilet gurgles, let’s stop it from happening. Below are three of the best solutions.
1. Plunge Your Toilet
The first step you should take is plunging your toilet. There’s a chance the reason your toilet is gurgling is because there’s a clog close to the surface.