Skip to main content

How To: Trim Out Laundry Sink Supply Lines

Watch How To: Trim Out Laundry Sink Supply Lines on YouTube.

Follow along for part two of Ben Goheen’s laundry sink installation. If you missed part one, check out the link below for the rough-in phase of the install.  

Watch: How To: Rough-In a Laundry Sink

In this video, Ben finished the laundry sink installation by trimming out the supply lines and drain. Watch as he uses the Eastman P-trap kit to connect the drain line to the newly added faucet.    

What you’ll need for the installation:  

Preparations

In part one of this installation, Ben roughed in supply lines for the new sink and replaced the washing machine outlet box. Since then, crews added drywall, reconnected the washer and dryer and installed a sink vanity. Now, it’s time to add the faucet and supply lines.  

To start the trim-out stage, remove the fixture box covers and thread the trim plates on the valves. Then, use silicone sealant and a 2 in. collar to seal the space around the drain line.

Faucet and Supply Lines Installation

Using a faucet kit, remove the escutcheons and leave only the foam ring at the base of the faucet. Then, set the faucet into the opening on the vanity and add the escutcheons to the bottom of the faucet by placing the gasket first, then the metal ring and tightening bracket. Hand-tighten the bracket, then use a screwdriver to tighten completely. Then, install the faucet line according to the directions provided in the kit.  

To install the supply lines, hand-tighten the lines to the valves and use a screwdriver to tighten the connection slightly. Then, turn the valves to the on position to allow for water flow and check for leaks.  

P-Trap Installation

First, install the basket strainer by setting the strainer into place and hand-tightening the ridge gasket and nut to the strainer and snug up the connection with a screwdriver. Now that your strainer is secure, you can install the trap adapter and p-trap.  

To install the Eastman trap adapter, cut your existing drain line with ratcheting cutters to remove the cap. Apply primer and glue to both the trap adapter and drain pipe. Then, push and twist the adapter onto the pipe and hold it in place for a few seconds.  

To install the Eastman P-Trap Kit, first discard the 1-½ in. by 1-¼ in. gasket, which should only be used for bathroom sinks. Then, slide the nut and gasket onto the end of the trap arm and thread the other nut onto the front of the trap arm. Next, slide the trap arm into the trap adapter and hand-tighten the nut to secure it in place. Then, snug the j-bend pipe to the trap arm to see how long of an extension piece you will need.  

Once you have cut your extension to the correct length, slide the but and beveled gasket onto the extension. Then, loosen the j-bend pipe from the arm and hand-tighten it to the extension pipe. Set the connected pipes into place by hand-tightening each side, one to the drain line and one to the trap arm.  

Finally, turn the water on and test for leaks by filling up the sink and pulling the drain.

See More Installations