Shower faucet repair can be done on your own if the problem lies in a defective or torn washer. Otherwise, if major plumbing adjustments are needed, you should just save yourself the time and effort and call in a good and experienced plumber.
Replacing the washer in a shower faucet is easily done in a couple of steps. This type of shower faucet repair is not much different from doing the same thing on standard faucets except for the fact that the orientation of the pipe is vertical. Remember that the spigot is not really in the shower itself but behind the shower handle. You will also have to know how to remove any decorative portions of the handles before you should even start doing your repairs. Sometimes, these plastic caps are held by the same screw that attaches the handles to the closure mechanism of the faucet. At other times, they are simply inserted into the handles.
Shut off the water supply of the shower faucet
The flow of water into the shower should be stopped before a shower faucet repair for two reasons. First, you have to drain the pipe of water. Second, if the water is on when you detach the spigot, the washer and the packing box may fall to the floor without your noticing that happened.
Remove the restraining collar and handles and locate the packing box
The next step in a shower faucet repair is to twist loose and remove the structure which restrains the spigot in the pipe. This easily done with pliers.
Unscrew the handles from the spigot and slip them off. Pull out the spigot and you should see the packing box at the end of it. If you remove the packing box you will see the old washer attached to the spigot by a screw.
Replace a new washer in place of the old one
Remove the screw and replace the old washer with a new one. Then push the end of the spigot gently but firmly into the packing box. This should stretch and compress the washer so that it blocks the water completely when the faucet is off.
Insert the spigot into the pipe and attach the handles and collar back on to complete your shower faucet repair.
If the water still leaks you may need to tighten the faucet by twisting it
If you still have a leak after replacing the washer, then the problem could be that your faucet does not fit into the water outlet pipe tightly. Alternatively you may need to do a shower faucet replacement. To fix this problem you should just phone a competent plumber to do the shower faucet repair for you.