How to Use A Seat Wrench

A seat wrench is an L-shaped plumber's tool used specifically to remove the washer seat in a faucet. You must replace the seat located inside the faucet body if the faucet leaks, and the rubber washer frequently needs changing.

Things You'll Need

• Flat-head screwdriver
• Phillips screwdriver
• Adjustable wrench
• Seat wrench
• Silicone rubber sealant

Instructions

1. Turn the water off underneath the sink or the main shutoff valve at the meter.

2. Pop off or unscrew the faucet cap. Loosen the screws in the faucet handle with a Phillips screwdriver and remove the handle.

3. Remove the faucet assembly by loosening the nut that holds it in place. If the exposed copper valve seat has a square or hexagonal hole through the center or a screwdriver slot, it is replaceable.

4. Take out the old valve seat by inserting the seat wrench and turning counter-clockwise. The wrench has a combination of square and hex heads that fits most faucet seats.

5. Install the new seat turning the wrench clockwise to tighten it.

6. Replace the faucet assembly and tighten it. Put the handle and faucet cap back on.

7. Turn the water supply on and check for leaks by turning the faucet on and off.

Tips & Warnings

• Use a pad between the faucet handles and tools when you are removing them to prevent damage.

• Place a paper towel over the drain before you start removing parts so you don't lose them down the drain.

• Add a little silicone rubber sealant around the threads of the new seat before you replace it so it will be easier to remove during the next repair.