Step 1: Gather Material Needed
• Allen Wrenches
• Tongue and Groove Pliers
• Needle Nose Pliers
• Faucet Grease
• New Cartridge
Step 2: Turn off the Water and Drain the System.
1. Locate the main water shut off for the house or apartment. It will most likely be located in the basement of a house or duplex. There will be one of two types of valves ,a ball valve (see picture 1) or another style of valve shown in picture 2.
2. Close the ball valve off by gripping the handle and rotate it clockwise. Move the handle until it has moved a full 90° from the original position. For the other style of valve pictured, grip the round handle and turn it in a clockwise direction until is fully closed.
3. Check to see if the water is shut off by turning on a nearby faucet, the water should slow down and stop running after 30
Tip: If the water does not shut off completely, return to the main shut off, open it back up by turing it in a counter-clockwise direction and the shut it again, this time applying slightly more pressure. If the water still does not shut off, call a professional to replace the valve.
4. If the water stops completely, leave the faucet open. This will drain the water that is left in the pipes once the shower cartridge is removed.
Step 3: Remove Trim From the Valve
2. Once the lever is removed the screw can be found (see picture 2). Try to evaluate what size allen wrench is going to be needed. Insert that wrench into the hole. To make sure the allen wrench is seated into the set screw, wiggle the wrench back and forth. If the wrench does not move at all you have selected the appropriate size wrench; if the wrench moves without resistance select a different size. Select the wrench that moves the least. For the other style of trim, the set screw can be found in the recess under the lever (see picture 4).
3. Loosen the set screw and remove the handle.
4. Next remove the chrome collar by gripping it and pulling straight back while twisting (see picture 5).
Step 4: Unscrew the Bonnet
Tip: To remove the bonnet of an older valve the channel locks may need to be used as shown in the picture.
(Caution: Be careful not to apply excessive force when using the wrench, this will deform the bonnet when using the tongue and grove pliers.)
Step 5: Remove the Old Cartridge.
Tip: If the cartridge will not come out, the cartridge can be removed with tongue and grove pliers (shown in picture 2), or the needle nose pliers may also be used.
Step 6: Prepare and Install New Cartridge.
2. Locate the H that signifies the hot side of the cartridge. When inserting the cartridge, be sure that on the H is on the hot side of the valve body, which, while facing the valve, is on the left hand side. (The H is grey and raised on the cartridge, in picture 2 it was made black for viewing purposes.)
3. Align the notches of the cartridge with the indents of the valve body (See picture 3).
4. Once aligned, apply steady pressure on the cartridge until there is no gap between the notches (See picture 3).
Step 7: Replace the Bonnet Turn the Water Back on and Check for Leaks.
2. Slowly open the main shut off valve about half way (see picture 2). Leave the faucet used to relieve the pressure open while the system is filling. Once all the air is purged and a steady stream is running out of the spout, shut all faucets off and let the system fill completely. Turn the main water shut off all the way on.
3. Inspect the shower valve and make sure there are no leaks (see picture 3). If there is a drip repeat steps 2-7, if the leak persists call a professional.