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How to repair a Delta single handle tub and shower faucet, once you have removed the nut. NOTE: If you have not removed the nut, Go Here First.

Ok so you were able to get the nut off of the Delta 622 or other older Delta single handle tub and shower faucet. If not, Please go back here With the nut off , the ball and other parts just pull out then you can just set them on the side, many times a ball can be cleaned up and re used, but if the ball needs to be replaced, please use genuine Delta replacement parts, after market parts really suck.
You can buy kits that have everything you need with out the ball and you can buy kits that include the ball, sometimes the old ball will look perfect, but will still leak, if this happens just replace the ball, Note: There are 2 different balls used in old Delta single handle faucets Please see the following images.
Click on any image to see a larger image.
Please note the thicker shaft, looking at it straight on it has a diamond shape. If your ball looks like this please continue following the instructions on this page. Also if you have a sink faucet with this type of ball, these instructions will work for that too.
Notice that the shaft on this ball is much thinner and round, for instructions on how to repair a shower faucet with this type of Delta ball please see the Delta single handle kitchen faucet repair page, the faucets are exactly the same, except for removing the spout and the diverter fitting.
This is what the Delta single handle faucet looks like when the handle, the nut, the ball and guides have been removed.
This is a close-up of the inside of the Delta 622 single handle tub and shower valve.
Notice the 3 round holes, the top left hole is the hot water inlet, the top right hole is the cold water inlet, the hole on the bottom is the outlet, this allows the water to go to the tub spout or the shower head. There is nothing in the bottom hole.
The hot and cold water inlets, inside the Delta shower body, each have a spring and a rubber seat in them. Remove both of them from the faucet and throw them away.
This is what the spring and rubber seat look like, notice the mineral deposits on the rubber seat. The springs get weak and the rubber gets worn, even if they look good, it's best to replace them.
When you buy the new parts to rebuild this, Delta single handle tub and shower faucet, you should also buy some silicone grease to apply to all of the parts. Please note: I am putting grease on the new rubber seat, before I put it into the inlet hole.
Note: I failed to show the proper way to install the new spring in to the inlet holes, the spring has a wide side and a narrow side, the wide side goes down touching the bottom of the inlet, the narrow side touches the inside of the rubber seat.
Notice that I also put grease on the Delta single handle tub and shower faucet ball, important note: if possible use genuine Delta replacement parts when rebuilding your Delta shower valve. sometimes dambco parts will cause extra problems.
Place the boot over the Delta faucet ball, it would not hurt to apply a little grease to it also.
At this point you have installed the hot and cold water springs and seats in to the hot and cold water inlets, inside the Delta shower valve body. Now you are going to insert the Delta ball with the boot and plastic retainer.
Delta single handle faucet repairPlease note the notch on the right side of the Delta tub faucet, and notice the little tap on the plastic Delta retainer, be sure the tab goes into the notch.
Note: sometimes when putting this assembly into place, it will push back.
The Delta Shower body nut, This nut has a plastic packing ring, I always grease the threads on the packing ring and the inside threads of the nut, and the threads the nut screws onto, on the Delta faucet.
This is a close look at the old style Delta tub and shower nut with the plastic packing ring.
This is a tricky part, as I said before, the assemble of the ball, boot and plastic retainer will push back, this will cause the tab on the plastic retainer to come out of the notch, be mindful of this when putting the nut on, you will have to take your hand off of the assemble to install the nut, unce you have the nut over the assembly, you will need to make sure the slot in the plastic retainer is in a perfect vertical position, make sure as you tighten the nut, that the slot stays vertical, and does not move to the right.
The nut has a natural stopping point, do not try to make it tighter, this wall cause the same problem as, trying to force a tight nut loose. 
With the nut on and tightened to it's stopping point, turn the water back on, before you reinstall the handle, turn the ball lever to see if water leaks out of the assembly when the ball is moved, if so tighten the plastic packing nut, this will stop it from leaking, don't make it so tighy, that you can-not move the handle.
Well that's it. If you need additional help please use the forum



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