DIY Network

How to Install a Drain Pipe

Learn how to install a drain pipe in a new laundry room with these simple step-by-step instructions.

More in Plumbing

  • Time

    1 hour

  • Price Range

    $1 - $50

  • Difficulty



Step 1: Attach the 'Y' Fitting

First, mark the drain pipe where the 'Y' fitting will go, then cut out a section with a reciprocating saw.

Remove the burrs from the pipe, prime the 'Y' fitting and the drain pipe before gluing them together and creating a 'Y' fitting tap-in.

mark drain pipe where Y fitting will go

Step 2: Install the Adaptor

Next, take a 2" drain pipe and add a 45-degree adaptor to the end, priming and gluing it to the 'Y' fitting (Image 1).

Attach a one-hole strapping to the floor joist, then slide the drain pipe into the strapping (Image 2).

Glue the drain pipe into the 45-degree adaptor that was just installed.

Step 3: Check the Water Lines

Hook up the extended washing machine drain line to the top of the stand pipe. Secure it to the water lines using a cable tie.

Open the isolation valves and check for leaks on the water lines. If everything is dry, go ahead and push the washer into place.

Step 4: Install the Dryer Vent

To install the dryer vent, start by removing or sliding back the old vent. Take a 4" flexible metal vent and add a hose clamp to the end.

Run the vent to the exterior vent hole and tighten down the hose clamp.

Run the vent line close to the back of the dryer, then slide in the dryer vent hose and tighten the clamp.

Plug in the dryer and washing machine.

installing the dryer vent