Taco Comfort Solutions Heating Only Mixing Valve 5000 Series 1in Union Sweat. It makes this mixing valve is an ideal choice for a radiant heating system whether in slab over pours or in joist bay heating installations. Add to that multiple connection types such as straight NPT union (sweat threaded CPVC or Pex) and you have a series of mixing valve that will fit most of your installation needs. Features: delivers stable mixed water temperature extended mix temperature range of 85 - 176F (29 - 80C) tamper-resistant cap low headloss outlet temperature strip and optional dial gauge and adapter. Taco 5004-HX-C3 is a 1" Union Sweat 5000 Series Heating Only Mixing Valve. Cv: 2.3. Maximum Flow: 20 GPM (Note: Slow should never exceed standards for pipe size). Minimum Flow: 1 GPM. Hot Supply Temperature: 120 - 180F (49 - 82C). Cold Supply Temperature: 39 - 80F (5 - 27C). Maximum Inlet Pressure: 230 PSI. Maximum Variation in Supply Pressure: 20percent. Minimum Temperature Differential Between Hot Supply and Mixed: 27F (15C). Outlet Temperature Range: 85 - 175F (29 - 80C). Dimensions: 6.1" Height x 4" Lower Height x 5.4" Width. Features of Taco Comfort Solutions 5004-HX-C3 Heating Only Mixing Valve 5000 Series 1in Union Sweat Valve Size and Style: 1" Union Sweat Maximum Flow: 20 GPM (Note: Slow should never exceed standards for pipe size) Hot Supply Temperature: 120 - 180F (49 - 82C); Cold Supply Temperature: 39 - 80F (5 - 27C) Maximum Inlet Pressure: 230 PSI Dimensions: 6.1" Height x 4" Lower Height x 5.4" Width Package Contents: Taco Comfort Solutions 5004-HX-C3 Heating Only Mixing Valve 5000 Series 1in Union Sweat Taco Comfort Solutions 5004-HX-C3: Heating Only Mixing Valve 5000 Series 1in Union Sweat