Modern showers add value and comfort to your home. Replacing a corroded or leaking shower faucet with a new single - lever shower faucet will add beauty to. If your bath or shower faucet drips, you can fix it with a few inexpensive . To install a single - handle faucet, you'll have to cut a hole into your shower surround. To install any type of tub and shower faucet, you need access to the pipes behind the tub / shower fixture, because the main part of the faucet -- the valve -- is. This video will show you how to install a one - handle Moen Posi-Temp Valve: Pex to Pex. Single Handle Faucet with Side Spray. Play Video Single Handle Single Hole Bathroom Faucet. Play Video Installing a Three Hole Fixed Roman Tub Valve. Your new Design House faucet is designed to give you years of trouble free Connect shower outlet pipe (2B) and tub outlet pipe (2C) to valve body. Connect.