Drain traps were invented to prevent sewer gases and other dangerous chemicals from entering the home or workplace. 

Today, not only does every home have a drain trap, but you are likely to find at least three drain traps in every modern home in America.

Thus, it can be inferred that knowing how to replace the drain trap(s) in your home is important for two main reasons: (1) their commonality in the modern home and (2) the significant purpose they serve in keeping dangerous gases out of your home.

Drain traps have changed in shape over the years, but today most drain traps that are installed in modern homes come in the shape of a P

The “P Trap” effectively prevents the entrance of sewage gases and can be found under sinks, bathtubs, toilets, and nearly any other plumbing fixture you have in your home. 

Should these drain traps become clogged or leak, it can allow sewage gases into your home. Thus, it is important to check your drain traps from time to time and if necessary replace them.

Use the following instructions to replace your drain trap:

(1) Place a Bucket Under the Drain Trap

If you drain trap is working properly it should always be full of water. This water trapped within the drain keeps the sewage gases from entering your home. That being said, when you remove the drain trap water will spill from the drain. Thus, keeping a bucket or pan under the drain trap will prevent water from getting all over the place.

(2) Remove the Slip Nuts

Using of groove or slip joint pliers, loosen the slip nuts holding your drain trap in place. Once the slip nuts are loose, you can unscrew the slip nuts by hand. Moving the slip nuts away from the pipes connect.

(3) Pull Off the Drain Trap

Now that the slip nuts are completely unscrewed, pull off the trap and allow the water inside of it to fall into the bucket below. Make sure you save the slip nuts and washers.

(4) Purchase the Necessary Replacement Parts

You will need to purchase the following if you wish to replace your drain trap: a replacement trap, two slip nuts, and two washers. You may not have to replace all the parts the make up your drain trap. You may be able to reuse the slip nuts and washers. Additionally, you can purchase these parts in a variety of materials such as PVC, brass, or ABS. Think about what material works best with your needs and your home.  

(5) Install the New Drain Trap

Using the new parts you have purchased to replace your drain trap, attach the new drain trap to the trap arms using the slip nuts and washers.

(6) Carefully Tighten the Slip Nuts

Using slip or groove joint pliers, tighten the slip nuts to secure the drain trap. Be careful not to over tighten the slip nuts or else you will crack the slip nuts or the drain trap itself.

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