Product Training

Valves

From simple single-head showers to custom showers featuring multiple outlets, valves are a critical component to any shower application.

This section is designed to provide a basic overview of all of Moen's shower valve options to help identify which valve you are working with, as well as troubleshooting information.

Product Overview

Anatomy of a Valve

Every shower has a valve that acts like an engine — shifting flow, regulating temperature and driving performance — and there are many options of design, functionality and operation suited to different applications.

The valve is placed behind the wall and connects directly to the hot and cold water lines to regulate flow and temperature. Most valves are available in a variety of connection types. A cartridge inserted into the valve connects to the external trim handles to control the mixture of hot and cold water and flow through the faucet based on the handle position.

With any Moen valve, you can be certain of unsurpassed safety, comfort and reliability since our valves meet applicable pressure-balancing or thermostatic safety codes and eliminate worry about hot or cold water surges. Plus, you can rely on our quality construction and dependable operation since each valve is backed by our Limited Lifetime Warranty.

Overview of Moen Valve Models

U by Moen Shower

Digital thermostatic with computer and mobile app-controlled temperature and flow.

ExactTemp® ¾” Thermostatic Valve

Mechanical thermostatic control.

Moentrol® Valve

Pressure-balancing volume control valve.

Two- or Three-Function Moentrol Valve

Volume and temperature control across multiple outlets. Handle pulls out to adjust flow and rotates from hot to cold.

Posi-Temp® Valve

Pressure-balancing cycling valve.

Two- or Three-Function Transfer Valve

Directs water flow to spray outlets.

Valve Basics

Terminology

There are a variety of terms attached to valve function. Here are quick-reference definitions for a few of the most common:

Pressure-Balancing

Protects users from "shower shock" due to a sudden change in either hot- or cold-water pressure elsewhere in the plumbing system (i.e., toilet flush). Pressure-balancing valves are designed to detect the pressure drop and automatically adjust the flow of water to maintain a consistent water temperature.

Thermostatic

These valves use a device to keep temperature consistent. They typically require a separate volume-control function, such as a transfer valve.

Cycling Valve

Turns on and off, cycling counter clockwise from cold (6 o'clock) to hot (9 o'clock). Does not provide volume control.

Volume Control

Allows the user to adjust water flow rates as other plumbing fixtures connected to the line are in use.

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Valve Product Line

  • U by Moen Shower Digital Valve

    U by Moen shower gives users the ability to control and customize their shower using both the digital controller and optional smartphone app.

    How it is used:

    2- or 4- outlet models are available for standard shower and vertical spa configurations. Standard hot and cold water inlets and outlets are used.

    Installation:

    Installation is easy due to the valve's compact size and flexible placement within 6 feet of a GFCI outlet. A 30-foot waterproof data cable connects the valve and controller.

    Benefits:

    • Precise temperature control
    • U by Moen cloud-based Wi-Fi infrastructure
    • Flexible installation and configuration options
    Download Instructions

    ExactTemp ¾” Thermostatic Valve

    The ExactTemp valve uses thermostatic technology for precise temperature control and high-volume capability to feed multiple showering devices.

    How it is used:

    Used in showers ranging from single-head to vertical spa when combined with volume control valves including the ExactTemp Volume Control Transfer Valve. Hot and cold inlets feed water through valve unit.

    Installation:

    Accommodates ¾” IPS inlets and outlets that can accept ½” adapters.

    Benefits:

    • Set maximum water temperature and temperature memory
    • Installation works with common household plumbing
    • Meets shower shock safety codes
    • Integrates with Moen M•PACT® Common Valve System
    Download Instructions
    Troubleshooting: ExactTemp ¾” Thermostatic Valve

    Moentrol Valve

    The Moentrol valve has a pressure-balancing mechanism and uses the 1225 cartridge. It can adapt to Moen’s two- or three-function transfer valves as needed for the addition of handshowers or for vertical spas. The Moentrol valve is also available with an integrated two- or three-function transfer valve option. The Moentrol valves also feature both temperature and volume control.

    How it is used:

    One-handle faucets and shower/tub applications. Separate hot and cold inlets and single outlet. Additional functionality with the two- or three-function Moentrol valve.

    INSTALLATION:

    Set temperature limit at install. Accommodates standard ½” connections. IPS and CC options available.

    Quick Fix:

    Most servicing can be done without turning off the water due to built-in shut-offs (or stops) by simply replacing the cartridge.

    Benefits:

    • Set maximum water temperature and temperature memory
    • Installation works with common household plumbing
    • Meets shower shock safety codes
    • Integrates with Moen M•PACT® Common Valve System
    • ExactTemp® to allow faucet replacement without replacing any plumbing
    Download Instructions
    Troubleshooting: Moentrol Valve
  • Posi-Temp Valve

    Also called a "cycling valve," the Posi-Temp Valve is a design that uses the 1222 high-flow pressure-balancing cartridge.

    How it is used:

    Shower and tub applications. Expandable to multi-outlet with addition of a transfer valve.

    Installation:

    Flexible installation options including copper, CPVC, crimp ring PEX, cold expansion PEX, and IPS. Valve options include quarter-turn stops to prevent the necessity to shut off water at the main line.

    Quick Fix:

    Be sure to turn off the water before replacing the cartridge.

    Benefits:

    • Flow reversibility
    • Set maximum temperature upon installation
    • Vertical spa compatibility
    • Back-to-back installation capability
    Download Instructions
    Troubleshooting: Posi-Temp® Valve

    Moen ExactTemp Volume Control Transfer Valve

    This transfer valve can be used in combination with the ExactTemp 3/4" Thermostatic Valve to add volume control to ExactTemp's precise temperature control. Additional volume-control valves can be added to support handshowers, body sprays and other functions.

    How it is used:

    Designed for two-outlet applications. Activates individual outlets for body sprays, handshowers or an extra showerhead. Two-function equals two independent functions. Three-function equals two independent and one shared function.

    Download Instructions

    Two- or Three-Function Transfer Valve

    Transfer valves can be used in combination with Posi-Temp® and Moentrol® valves.

    How it is used:

    Designed for two-outlet applications. Activates individual outlets for body sprays, handshowers or an extra showerhead. Two-function equals two independent functions. Three-function equals two independent and one shared function.

    Download Instructions
  • Annex Shower Rail
    External Transfer Valve

    Annex provides users an easy solution for adding handshower functionality to an existing shower.

    How it is used:

    • External transfer valve activates showerhead and handshower
    • Works with any shower arm, showerhead and handshower trim

    Installation:

    No rough plumbing or tile disruption required. Annex installs outside the wall using existing plumbing. System is adjustable to account for different surface depths and to offset drywall/shower surface situations.

    Benefits:

    • Add a handshower without any rough plumbing
    • Adjustable installation accounts for surface and wall offset spacing requirements
    • Works with any showerhead and handshower trim
    Download Instructions

See side-by-side comparisons on our valve comparison chart.

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