Taco 3450-T2 1/2inch Union Combination Pressure Regulating Boiler Feed & Backflow Valve
The Taco 3450-T2 is a 1/2-inch union combination valve engineered for hydronic heating systems. This dual-function unit integrates pressure regulation and backflow prevention in a single compact assembly, reducing installation complexity and footprint requirements. Designed for boiler feed applications, the valve maintains system pressure within optimal operating parameters while the integral backflow preventer protects potable water supplies from contamination. The union connection allows straightforward installation and service access without disrupting adjacent piping. Ideal for residential and light commercial heating systems where code-compliant backflow protection and pressure control are essential. Meets industry standards for both pressure regulation and backflow prevention performance.
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Orders placed by 2:00pm EST will ship same day, except on holidays.
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Product overview
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Delivery & Returns
Orders will ship same day if received by 2pm EST.
Upcoming holiday closures: July 3, 2026
All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.
FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.