DIY Network

How to Install a P-Trap

When renovating a bathroom and replacing a shower floor, it's a good idea to replace the P-trap. Use these step-by-step instructions and install one in no time.

More in Plumbing

  • Time

    Under Half Day

  • Price Range

    $100 - $250

  • Difficulty

    Moderate

Highlights:

Step 1: Cut the Shower Floor

When you are replacing a shower floor, it's a good idea to replace the P-trap while it is accessible.

Cut open the shower floor, giving yourself enough room to work around the drain.

replace P trap while it is accessible

Step 2: Measure and Cut the Plywood

Draw lines on the area you want to cut (Image 1), then make a plunge cut with a circular saw (Image 2). Cut along all four lines, then use a reciprocating saw to cut the piece in two (Image 3). Pry up the pieces (Image 4).

Step 3: Position the P-Trap

Use a reducer to transition from the existing 1.5" drain line to the 2" drain. Apply ABS glue to the pieces and press them firmly together (Image 1). Be sure to place the P-trap in the correct location for the drain (Image 2).

Step 4: Install New Plywood

Drop a new piece of plywood into place so you can measure the distance from the drain to the P-trap. Cut a piece of ABS to connect them.

Screw plywood to floor joists, then attach the drain.

drop new piece of plywood into place

DIY Experts

Sweat Equity

Renovate your home with host Amy Matthews.

Tune in:

Wednesdays

10 | 9C

Full Schedule

Was this project helpful?

Don't forget: Read comments and leave your own

Advertisement

Projects

COMMENT ON THIS PROJECT

    

Sign in

All fields are required.

E-mail Address:

Password:

Remember me on this computer

Signing in

Please enter your email address and we will send your password

E-mail Address

Your password has been sent and should arrive in your mailbox very soon.

Not a member?

Sign up with DIY Network to share tips with other do-it-yourselfers and comment and ask questions on projects.

It's free and easy.