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The Delta Single Handle Bathroom Lavatory faucet.

Step by step instructions on how to repair your Delta single handle Lavatory bathroom sink faucet.

Yes you can do it yourself with the help of the following instructions.
Please click on any image to see a larger image of the Delta single handle bathroom sink faucet.

This is the Delta Bathroom sink faucet we are going to repair. Please note: the internal parts for this Delta faucet are the exact same as the Delta single handle tub and shower faucet that used this same ball. Please see this page.
Delta 622 and other.

Delta Lav faucet

Two handle Delta Lav.

As always turn the water off first, there should be valves under the sink to turn the water off, they may not turn or may start to leak once you touch them, This is what happened to me this time, so I had to replace the valves under the sink or the stops as they are know in the trade. If you can not get the water off under the sink you will need to turn it off at the main water valve.

Delta single handle lav.

Test to be sure the water is off by opening the faucet, if you had to turn off the water main, water may flow for a minute or 2 before it stops flowing, if you turned it off under the sink and it is still flowing, the valves or stops are not holding the water and you will need to turn off the main water valve.

Delta handle cap

Once the water stops flowing, remove the little cap on the top of the handle, I was able to remove this one with my thumb nail but you may need to use a screw driver with a small plat head to pry it off.

Delta handle screw

Now you need to remove the Philips screw in the center of the handle.

Delta faucet handle

With the screw removed you should be able to pull up on the handle to remove it, this one came ff easy, some do not and you will need to use a handle removing toll to get it off.

Delta handle adaptor.

Some after market handles have this little adaptor that fits in the handle be sure to remove and save this adaptor, you will need to put it on the new Delta ball handle.

Delta faucet nut

Now you need to remove the nut, In this image I am using a pair of channel locks to remove the Delta nut, You may want to use a rag or some other thing between the channel locks and the Delta nut, to avoid scratching the nut.

Dwlta lav without handle

This is what it looks like with the nut removed. remember you can click on any image to see a larger version of the image.

Delta bath sink ball

Now you should be able to just grab and pull the Delta ball assembly out of the faucet, you may need to pry it out, if so be careful not to damage the brass on the Delta faucet.

Delta bath faucet seats

Now you need to remove the Delta single handle bathroom sink faucet, seats and springs, there is one seat and spring on either side.

Delta bath faucet parts

This is the content of the delta kit I purchased to repair this faucet, This repair kit came with parts I do not need, but I will use them on another faucet, all I really needed was the 2 new springs, and the 2 new seats, the black rubber boot and the white plastic part.

Delta lav ball

The Delta ball RP212F Is sold separately, you may not need to replace the Delta ball, but I like to replace everything the first time to prevent doing it twice.

Grease Delta ball

I place a small amount of plumbers grease on the surface of the black rubber seat, You may think it is a washer, but Delta faucets are washer less, so it is a seat.

Delta spring faucet

The spring, is cone shaped, it's very important that you install it correctly, The smaller diameter goes inside the black rubber seat and the larger diameter goes into the faucet body.

Delta bath seat spring

Now place the seat and spring into the faucet body one on the left and one on the right, make sure the seat and spring are set evenly in the faucet body, if you push in on the seat you should feel it push back a little when you release your finger from it.

Delta ball assembly

This is what it looks like when it is ready to install in to the faucet body.

Delta bath faucet repair.

Press the Delta ball assembly into the faucet body making sure the little tab lines up with and goes into the little notch in toe faucet body.

Delta pin line up

Now this is a little tricky, you need to let the Delta ball assembly go to put the nut back on (by the way I put a little plumbers grease on the threads inside the nut and on the faucet body) and the assembly likes to come up, and the tab comes out of the notch, then when you put the nut over it you can not see it any more. just push in back down from inside the hole in the top of the nut, if it turns when you tighten the nut the tab is not inside the notch, line it back up and press harder.

Then tighten the nut, it has a natural stopping point, don't go he man or she woman on it.
Just replace the handle and the cover and turn the water back on. test for leaks and that the handle moves easy.
Put the cap back on the handle and check any valve you touched for new leaks. now you are done. You just did it yourself with my help.

If you need further help please click on the Answers Now link at the top of the page.