How To Install Pipes Under Kitchen Sink

Installing pipes under a kitchen sink may seem like a daunting task, but with the right tools and instructions, it can be a manageable DIY project. By following these step-by-step instructions, you can ensure a secure and functional plumbing system.

Step 1: Gather Necessary Materials

Before starting, gather the following materials:

Two adjustable wrenches
Plumber's putty
Teflon tape
New sink drain pipe
New water supply lines
P-trap
Sink strainer
Bucket

Step 2: Turn Off Water Supply

Locate the water shut-off valves under the sink and turn them clockwise to close them. Turn on the kitchen faucet and wait for the water to stop flowing, indicating that the water supply is turned off.

Step 3: Detach Old Drain Pipe

Place the bucket under the sink to catch any water that may spill. Use the adjustable wrench to loosen the nuts connecting the old sink drain pipe to the P-trap and the tailpiece on the sink. Remove the old drain pipe.

Step 4: Install P-trap

Apply a thin layer of plumber's putty around the base of the P-trap. Insert the P-trap into the drain hole in the sink and hand-tighten the slip nuts that connect the P-trap to the sink flange. Use the adjustable wrench to further tighten the nuts.

Step 5: Install New Drain Pipe

Apply Teflon tape to the threads of the new sink drain pipe. Insert the pipe into the P-trap and hand-tighten the slip nut. Use the adjustable wrench to fully tighten the nut.

Step 6: Install Sink Strainer

Place the sink strainer over the drain hole in the sink and push down to secure it.

Step 7: Install Water Supply Lines

Apply Teflon tape to the threads of the new water supply lines. Connect the cold water line to the cold water shut-off valve and the hot water line to the hot water shut-off valve. Hand-tighten the connections and then use the adjustable wrench to fully tighten them.

Step 8: Reconnect Water Supply

Turn on the water shut-off valves under the sink to restore the water supply. Check for leaks around all the connections and tighten any loose nuts if necessary.

Step 9: Test Sink

Turn on the kitchen faucet and let the water run for a few minutes. Inspect all the connections for leaks and make sure the water drains smoothly.

Tips:

Use a flashlight to inspect for leaks under the sink.
If you encounter any difficulties, don't hesitate to call a licensed plumber.
Regularly check the pipes and connections under your sink for any signs of leaks or damage.