Tools required to repair a Moen bathroom faucet include screwdrivers, an adjustable wrench, pliers, a flashlight and plumber's tape. In some instances, the job requires plumber's putty and an appropriately sized hex wrench.
Moen faucets are available in single- and double-handled units. Many of these faucets are washerless in design. They form a seal using o-rings on ball valves, cartridges or ceramic discs. With ball valve and cartridge-type faucets, it is possible to replace a worn o-ring on a cartridge or ball valve that is still in good shape, but if it is broken, cracked or chipped, the owner should replace it.
Ceramic disk faucets that leak require replacing the disk. Repairs other than replacing the disk are not available with this type of system.
Before beginning any faucet repair, the homeowner should turn off the water. Most homes have two valves located under the sink, one for hot water and the other for cold. After turning both valves counterclockwise to the off position, the person should open the valve to relieve pressure. If there are no valves, as when working on a bathtub, the owner should turn off the water at the home's water main. Once the repair is complete, he should turn the water back on and check for leaks.