Skip to Main Content


Lead Free* Master Tempering Valves for Hot Water Distribution with Check stops

The LFN170 CSUT Lead Free* Master Tempering Valve Series is designed for use in commercial and institutional applications, to mix hot and cold water to reduce high service water temperature to the building distribution piping system. The LFN170 CSUT series is designed for installation at the hot water source. It features Lead Free* brass body construction, a copper/paraffin thermostat assembly, and a lockable temperature adjustment for increased safety. Polysulfone internals resist excessive heat, liming and corrosion, and a single-seat design ensures tight shut-off in the event of cold water supply loss. Has three-in-one checkstops to prevent cross flow, isolate valve to facilitate maintenance, and integral screens to filter out debris. The LFN170 CSUT is listed to ASSE 1017 and IAPMO cUPC in compliance with CSA B125.3. Temperature range is 90 to 180 degreeF (32 to 82 degreeC). Maximum pressure is 125psi.


  • Poppet and seat are dirt- and lime-resistant
  • Vandal-resistant locking mechanism prevents tampering with temperature setting
  • Paraffin-based thermostat senses and adjusts outlet temperature
  • Provides virtual shutoff if supply pressure fails

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LFN170 CSUT

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: