Delta two-handle bathroom faucet instructions are simple enough for everyone, even the
greenest do-it-yourselfer. There are now two styles of Delta faucet operating components; the original
seat/spring and stem design, and the new self-contained cartridge stem assembly. The repair parts for both
styles are readily available at hardware stores and home centers across the US and on the web. Find your
faucet’s specific model and necessary repair parts at DeltaFaucet.com before you begin, or take the faucet
parts to the store with you; this is the preferred method to assure that you get the right part for the right
Delta Seat & Spring Style
1. Turn the water off to the faucet’s supply lines under the sink.
2. Turn the faucet handles on to relieve the remaining water pressure.
3. Remove the handles.
Delta plastic acrylic handles will have a plastic index
button covering a handle screw. Pop out the index button with your fingers, or use a screwdriver to pry it out
of the handle. Use a Phillips screwdriver and remove the handle screw. The handle should pull off
Delta metal lever handles use a small setscrew located
under the handle’s lever. Use a 3/32-inch or 2.5mm Allen wrench to loosen the setscrew. You do not need to
remove the screw completely. The lever handle should now come off without any trouble.
4. Unscrew the stem bonnet nuts. Under the handle, you will see a hexagon shaped nut holding the
Delta faucet stem in place. Use an adjustable crescent wrench to loosen the nut by turning it
counterclockwise, and then remove it by hand.
5. Pull the stems up and out of the faucet. The stems will have some resistance when you pull up
on them; this is normal do to the O-ring’s watertight seal.
6. Remove the seats and springs. Use a pair of tweezers or the small Allen wrench to pry out the
old seats and springs.
7. Clean the inside of the stem barrels. If you notice a whit mineral deposit buildup inside the
faucet, use a scouring pad and a little vinegar to sand it off. Turn the water supply valves on one at a
time, just enough to wash out any remaining debris.
8. Insert new seats and springs. Slide the small opening end of the rubber seat onto the Allen
wrench or a small screwdriver, followed by the small end of the metal spring. Guide the set down into the
supply port in the bottom of the faucet barrel. Use your index finger to line up seat inside the
9. Insert the new stems into the faucet. Line up the guide on the side of the stem and the notch
on top of the faucet barrel. The guide and notch prevent the whole stem from turning while you operate the
10. Replace the bonnet nuts. Screw the nut on as tight as you can by hand, and then turn it a
little more with the crescent wrench to secure it. According to the Delta Bath Faucet Instructions, “Do not
over tighten the nuts”! You may damage the faucet irreversibly.
11. Reinstall the handles by setting them back on the stems. Make sure that they turn off in their
proper positions. If the handles do not turn off the right way, take the stem out, turn it 180 degrees, and
12. Turn the water on and check for leaks.
Delta Disc Cartridge style
1. Turn the water off and remove the handles and bonnet nuts.