Why does my downstairs toilet overflow when I flush the upstairs toilet?

Why does my downstairs toilet overflow when I flush the upstairs toilet?

There is a clog downstream from your lowest level toilet, but that, too, should show signs an overflow. There is too much water trying to get through your drain/sewer hook up than it can handle. It could be roots or a crushed pipe to any number of causes.

When I flush the toilet water comes up in the basement?

If your basement floor drain backs up when the toilet is flushed, it’s caused by a blockage in your home’s sewer line. The most common source of these blockages is flushing items that aren’t meant to be flushed, but tree roots invading the sewer line can also cause blockages. This is not a DIY fix.

Can an upstairs toilet clog a downstairs toilet?

You have a blockage downstream of the downstairs toilet, and it’s blocked beyond where the upstairs drops in. That blockage will always overflow the lower toilet when enough water has been dumped from upstairs. It will have to be fixed, or the damage to the home will be more than the small repair.

How do you know if your main drain is clogged?

Signs Your Sewer Line May Be Clogged

1. Dark Water. One of the signature symptoms of a main-drain clog is water backing up in your tubs or showers.
2. Slow-Moving Drains. Take a minute to think about the drains in your home.
3. Gurgling Sounds.
4. Clogged Plumbing Fixtures.
5. Turn Off the Water.
6. Call a Plumber.

Why does my downstairs toilet keep blocking?

Excess waste and toilet paper or non-flushable items can become lodged in the toilet trap after they are flushed. When there is a significant mass stuck in the toilet trap, the toilet keeps clogging as normally flushed material is more likely to catch and clog.

How do you unblock a downstairs toilet?

To unblock a toilet with baking soda and vinegar, pour a cup of baking soda (fizzier) or bicarbonate of soda if that is what you have to hand, into the toilet bowl. Follow it with a cup of white vinegar. Allow this to fizz for 20 minutes. Flush; this should have cleared most blockages and left a fresher smell also.

How do I stop my basement floor drain from backing up?

Fix Sewage Backup in Basement Floor Drains The acidity in Coca-Cola can help clear a sewage backup but may leave a residue itself. A drain snake is a great tool to unclog plumbing fixtures, but if you don’t have one, you could use a hose or plunger to clear a clogged drain.

How do I unclog my basement sewer line?

Start by pouring a pot of boiling hot water down the drain, followed by ½ cup baking soda. Let that sit a few minutes, then pour a mixture of one cup of vinegar and one cup of very hot water on top of the baking soda. Let it sit for five to ten minutes, then flush it one last time with another pot of boiling water.

How do you unclog a 4 inch sewer line?

How to clean out a main sewer line clog

1. Step 1: Loosen the cap on the drain pipe. Loosen the cap on the drain pipe.
2. Step 3: Feed the auger cable into the drain pipe.
3. Step 4: Run the auger until the clog is clear—and beyond.
4. Step 5: Hose down the pipe and auger cable.
5. Step 6: Slowly pull the auger back out of the pipe.

What can you put in toilet to unclog?

Make your own drain cleaner by pouring one cup of baking soda and two cups of vinegar into the toilet and adding a half gallon of hot water. Dish soap can also help loosen some obstructions. When using either method, allow the solution to sit overnight and then flush the toilet to see if the obstruction has cleared.

What happens if you flush the upstairs toilet in the basement?

If you flush the upstairs toilet and the basement toilet overflows then you have a clog in your main. The water hits the clog and has no other place to go so comes up in the basement toilet.

Why does water come up in my Basement Toilet?

The water hits the clog and has no other place to go so comes up in the basement toilet. If you have a floor drain and there is no water coming up at that location then the clog has to be in the pipe after the toilet ties into the main and before the branch for the floor drain.

Why does the toilet flush down the vent stack?

So, when the upstairs toilet flushes a large volume of water down the vent stack it forces air up through the toilet since it cannot go up through the AAV. The only really good solution is to add a vent to the downstairs plumbing that goes all the way to the attic and joins the house vent stack there.

Where is the drain from the downstairs toilet?

Without knowing your house layout, you can follow the drain from the downstairs toilet to where it meets the pipe for the drain from the upstairs toilet. Once you identify the drains intersection, look for another drain from any sink anywhere in the home that is PAST the intersection of the two toilets pipes AND closer to the main sewer drain.

If you flush the upstairs toilet and the basement toilet overflows then you have a clog in your main. The water hits the clog and has no other place to go so comes up in the basement toilet.

The water hits the clog and has no other place to go so comes up in the basement toilet. If you have a floor drain and there is no water coming up at that location then the clog has to be in the pipe after the toilet ties into the main and before the branch for the floor drain.

So, when the upstairs toilet flushes a large volume of water down the vent stack it forces air up through the toilet since it cannot go up through the AAV. The only really good solution is to add a vent to the downstairs plumbing that goes all the way to the attic and joins the house vent stack there.

Without knowing your house layout, you can follow the drain from the downstairs toilet to where it meets the pipe for the drain from the upstairs toilet. Once you identify the drains intersection, look for another drain from any sink anywhere in the home that is PAST the intersection of the two toilets pipes AND closer to the main sewer drain.