While the valves do have several similarities:
A pressure-balanced system that maintains water temperature within ±3°F (1°C)
Built-in temperature limit stops which allow you to control how far the handle rotates, therefore, controlling the range of water temperature
Best water flow for any comparatively priced valve
Available in a variety of connections from common ½" CC/sweat, ½" IPS-threaded; ½" PEX or CPVC
Meets pressure-balancing safety codes
There are a few differences to consider before making a decision.
Feature | Moentrol | Posi-Temp |
Handle Operation -- How the faucet is turned-on and off. | Pull / Push | Rotation |
Temperature Memory -- When shutting-off the faucet, the handle stays in the exact temperature position you set during use. The next time you turn-on the faucet, within a few seconds, the water temperature reaches your last temperature setting. | Yes | No |
Volume Control -- Controls the water flow rate so you get the amount of water you want at the temperature you want. | Yes | No |