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What Is A P-Trap? - AP Plumbing

What Is the Purpose of a P-Trap?

Simply put, the purpose of a P-trap is to prevent sewer gasses from flowing back into your home through your drain. This bend in the pipe traps a small amount of water, which acts as a barrier to keep any gasses or odors from entering your living space.

What Causes a P-Trap to Become Clogged?

While this is important for maintaining a healthy living space, it can also be a prime spot for debris to accumulate. This can happen for several reasons, including flushing inappropriate items down the drain or accidentally dropping small objects like a wedding ring. These foreign objects are known to get stuck in this curved part of the pipe, as this will usually prevent them from sinking any further down the drain line. If you do experience a clog, removing the P-trap is the best way to access the clog and clean out the debris.

How Do You Fix a Dry P-Trap?

To fix a dry P-trap, you’ll need to first locate the P-trap. Next, you will need to check the pipe for water. If there is no water, the P-trap is considered dry and should be addressed sooner rather than later. Believe it or not, all you’ll need to do is slowly pour a gallon of water into the sink P-trap to restore the water seal. Running water can also help.