1/2" FNPT x 1/2" Union FNPT Combination Boiler Feed Valve & Backflow Preventer


Brand: Taco

Mfr Part#: 3450-T2

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$92.95 / each
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Taco 3450 valve combines cartridge-style boiler feed valve and dual check with backflow preventer & atmoshperic vent into a one-piece design - simply dial the pressure setting and connect the pipes. Ideal for typical radiant heat and baseboard/radiator hot water heating systems. Both backflow and pressure reducing cartridge can be serviced or replaced without shutting off water supply.


  • Easy pressure dial with large adjustment range;
  • Replaceable and serviceable cartridge for both the backflow and pressure regulator - without draining the system;
  • Auto-reset from fast fill mode;
  • Adjustable 360° view of pressure indicator;
  • ASSE 1081-2014 compliant;
  • Compact, one-piece body construction.

Technical Specifications:

  • Max Inlet Pressure: 150 psi;
  • Min Delta Pressure (Inlet to Outlet): 15 psi;
  • Recommended Setting Range: 10 - 50 psi;
  • Factory Setting: 12 psi;
  • Adjustment Capacity: 8.5 - 65 psi;
  • Max Flow Rate: 25 gpm;
  • Max Temperature: 210°F;
  • Max Inlet Pressure: 150 psi.
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