Moen One Handle Tub/Shower Valve Trim Installation Instructions

This guide provides detailed instructions for installing Moen one-handle tub and shower valve trims. It covers various installation scenarios, troubleshooting common issues, and care instructions.

Troubleshooting Guide

Problem	Possible Cause	To Diagnose	Remedy
Hot/cold reversed	Lines reversed/cartridge installed upside down	Hot/cold reversed	Rotate cartridge stem 180° so that the notch is facing down towards the drain.
No water/low flow	One or both supplies not on to the unit	No water/low flow	Turn both water supply valves counterclockwise to the on position.
Leak or drip from spout	Grommets not sealing properly	Leak/drip from spout	Replace cartridge.
Only hot/no cold	Balancing spool stuck	Only hot/no cold	Replace cartridge.
Only cold/no hot	Balancing spool stuck	Only cold/no hot	Replace cartridge.
Stacking (Water comes out of the showerhead during tub fill mode)	Choice of pipe/distance between valve and showerhead less than 46"/multiple elbows/anything restricting flow of water exiting valve	Water comes out of spout and showerhead at the same time	Remove tub spout and flush out debris - Replace undersized line or fittings.
Restricted temperature range	Flow restriction	Water flow from spout	Remove tub spout and flush out debris - Replace undersized line or fittings.
Not able to install handle/handle rubs up against escutcheon	Valve installed upside down	Valve installed upside down	Remove valve and reinstall in the proper orientation.
Handle is hard to turn	Cartridge stem is difficult to rotate	Difficult movement from handle	Remove handle, rotate 180°, re-install. Position temperature limit stop to desired temperature position.

Parts Supplied

Tub/Shower Parts Supplied

Diagrams illustrating parts for Tub/Shower installation, including:

A. Shower Arm Flange
B. 4 Port Valve and Stop Tube
C. Key Stop
D. Adjustable Temperature Limit Stop
E. Plaster Ground
F. Escutcheon
G. Escutcheon Screws (x2)
H. Shower Arm
I. Lever Handle Adapter
J. Adapter Screw (1/2")
K. Lever Handle
L. Hex Screw
M. 7/64" Hex Wrench
N. Tub Spout
O. Showerball
P. Nut
Q. Rainshower with 3 Way Diverter
R. Handheld Shower
S. Washer (x2)
T. Hose
U. Product Identification Label

Shower Only Parts Supplied

Diagrams illustrating parts for Shower Only installation, including:

A. Shower Arm Flange
B. 3 Port Valve and Stop Tube
C. Key Stop
D. Adjustable Temperature Limit Stop
E. Plaster Ground
F. Escutcheon
G. Escutcheon Screws (x2)
H. Shower Arm
I. Lever Handle Adapter
J. Adapter Screw (1/2")
K. Lever Handle
L. Hex Screw
M. 7/64" Hex Wrench
N. Tub Spout (omitted for shower only)
O. Showerball
P. Nut
Q. Rainshower with 3 Way Diverter
R. Handheld Shower
S. Washer (x2)
T. Hose
U. Product Identification Label

Rough-in Plumbing Variations

This section details how to determine the existing rough-in plumbing installation for Copper, PEX, IPS (Galvanized Iron Pipe/Threaded Connections), and CPVC, providing helpful tools for each type.

Copper: Visuals of front and back views of copper plumbing connections with a list of recommended tools.

PEX: Visuals of front and back views of PEX plumbing connections with a list of recommended tools.

IPS – (Galvanized Iron Pipe/Threaded Connections): Visuals of front and back views of IPS plumbing connections with a list of recommended tools.

CPVC: Visuals of front and back views of CPVC plumbing connections with a list of recommended tools.

Caution: Always turn off hot and cold water supplies before removing or disassembling the faucet or valve. Open the faucet handle to relieve pressure and ensure complete water shut-off.

Installation Schematics

Diagrams illustrating measurements for ideal tub/shower performance, including:

2.1 Tub/Shower: Shows valve body placement relative to the tub floor, shower arm height, and tub spout placement.
2.2 Shower Only: Shows valve body placement relative to the shower stall floor and shower arm height.

3. Installing Your Valve

Moen provides a plaster ground attached to the valve for installation and alignment. The plaster ground can be configured to accommodate various installation needs and protect the valve from construction damage.

3.1 Thin Wall Installation:

For walls less than 1/4" thick. Involves drilling a hole for valve access, centering the plaster ground/valve assembly, attaching water connections, and breaking off the plaster ground cap.

3.1 Thick Wall Installation:

For walls greater than 1/4" thick. Involves drilling a larger hole for support, positioning the plaster ground flush with the finished wall, securing the valve, attaching water connections, and removing the plaster ground.

3.2 Escutcheon Installation:

Ensures the cartridge clip is installed prior to escutcheon installation. For thin wall installations, the wall is trapped between the plaster ground and trim. For thick wall installations, the plaster ground can be discarded. Instructions for securing the escutcheon to the wall.

Special Instructions for Shallow Wall Cavity Installations

This section provides guidance for installations where the wall cavity restricts valve placement. It details how to reconfigure the plaster ground/valve assembly for shallow wall cavities.

4. Installing Your Moen Tub/Shower Trim

4.1A-C: Attaching the showerhead and showerball to the shower arm.
4.1D-F: Connecting the hose and handheld shower to the rainshower and docking the handheld shower.
4.2: Turning the diverter knob to select the desired shower mode (Rainshower, Combination, Handshower).
4.3A: Threaded Tub Spout Installation, including measurements for pipe length and applying thread seal tape.
4.4 Cartridge Orientation: Instructions on rotating the cartridge stem and inserting the key stop and adjustable limit stop.

Lever Handle Installation

Instructions for attaching the plastic handle adapter to the cartridge stem and placing the lever on the adapter.

5. Setting The Temperature Limit Stop and Finishing Your Tub/Shower Installation

5.1: Turn on water supply to check for leaks and set the temperature limit stop.
5.2: Rotate the lever counterclockwise to the desired temperature (max 120°F/49°C). If temperature exceeds 120°F, proceed to 5.3. If less than 120°F, proceed to 5.5.
5.3: Remove lever and adapter, note stop position, and adjust the temperature limit stop.
5.4: Reattach the lever handle adapter, adapter screw, and lever, ensuring correct alignment.
5.5: Insert and tighten the adapter screw into the lever using the hex wrench.

Care Instructions

To preserve the finish, apply non-abrasive wax (like car wax) and rinse immediately after cleaning. Specific instructions are provided for Spot Resist™™ Stainless and Spot Resist™™ Brushed Nickel finishes, advising against abrasive cleaners, ammonia, bleach, organic solvents, or harsh chemicals.

Moen Lifetime Limited Warranty

Moen offers a lifetime limited warranty to the original consumer purchaser for their home, covering defects in material and manufacturing workmanship under normal use. For commercial or business use, the warranty is 5 years. The warranty covers replacement of defective parts and finishes but excludes damage from installation errors, abuse, misuse, or improper cleaning agents. Proof of purchase is required for warranty claims.

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