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If you have a leak coming from the handles of the bathtub faucet, always check the faucet first. If the you do, and it does not work, you can go on to the piping. But, bathtub piping is so hard to reach, make sure the faucet isn't the problem first. To fix the faucet, you will need a wrench, a
screwdriver, and several new parts.
There are two main types of bathtub faucets, the compression tub, and the washerless tub faucet. Here are directions for fixing both.
1. Compression tub faucet
A compression tub is made up of a cap, screw, handle, escutcheon, locknut, o-ring, stem, washer, screw, and valve seat. If you place the parts in this order and connect them, they will make a handle that will turn your water on
and off. This faucet works by turning the faucet clockwise or counterclockwise.
If you find a leak, start taking the handle apart, starting with the cap. When you work your way to the valve seat, check each washer, o-ring and screw. If any are worn or rusted, replace them. Then reassemble the handle.
Make sure the screws and locknuts are tight. Once you replace all the items, you should not encounter any leaks.
2. Washerless tub faucet
A washerless tub is just that, is has similar parts as the compression faucet, but without washers. It is made of a setscrew, diverter valve, cap, screws, escutcheon, friction ring, mounting screws, cartridge, inlet seals,
and a valve body. Again, by placing these together in this order, you can move the handle up or down to make water come on or stop.
If you find a leak, start taking the handle apart, starting with the setscrew. Work your way to the valve body. As you move closer, check each screw, friction ring, and inlet seal. Again, if any are worn or rusted, replace them. Then reassemble the handle. Make sure the screws are tight.
Once you replace all the items, you should not encounter any leaks.