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3450 Combination Boiler Feed & Backflow Valve

3450 Combination Boiler Feed & Backflow Valve

The integral design of the Taco 3450 Combination Boiler Feed & Backflow Valve combines a cartridge style backflow preventer with a pressure regulating cartridge style boiler feed valve into a unique one piece body configuration. Taco’s 3450 combination dual check backflow with atmospheric vent and boiler feed valve with purge auto-reset, dial in pressure setting and adjustable indicator sets a new standard for performance and serviceability.

Instruction Sheet
Submittal Data
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Performance Data

Max. Inlet Pressure: 150 psi (10.3 Bar)
Min. Delta P Inlet to Outlet: 15 psi (1 Bar)
Recommended Setting Range: 10-50 psi , +/-3 psi , (.7-3.4 bar)
Factory Setting: 12psi (.8)
Adjustment Capability: 8.5 – 65 psi, (.6-4.5 bar)
Max. Flow Rate: 25 gpm (8 ft / sec), 95 l/m
Max. Temp.: 210˚F (99˚C)

  • Auto Reset from Fast Fill
  • ASSE 1081-2014
  • Simple Pressure Adjustment
  • Serviceable Cartridge for both the Backflow and Feed Valve
  • Adjustable 360 View of Pressure Indicator
  • Large Adjustment Range
  • Serviceable without draining the system
  • One Piece Body Construction
  • Stainless Steel Strainer
  • Hydronic Heating Systems
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