the Apollo Conbraco 4A-4A3-3AM is a 1/2" FNPT dual check backflow preventer engineered for reliable protection in residential and commercial water supply lines

It is essential to cross-reference your unit's serial number and valve code against the manufacturer’s technical tables to ensure the spring tension and orifice diameters match your BTU rating

Simplified Installation: The threaded NPT connections and compact direct-coupled design eliminate the need for specialized linkages or complex mounting

Constructed from durable materials to resist corrosion in high-heat environments

Rugged Reliability: Designed for stable

Conbraco 18C-511-5-150 Valve Freon the Apollo Conbraco 4A-4A3-3AM isThe Conbraco 18C 511 5 150 is a high capacity Temperature and Pressure Relief Valve designed for heavy duty commercial and industrial water heaters. Engineered with a 3 4" Male NPT inlet and a 3 4" Female NPT outlet, this T&P relief valve is set to trigger at 150 PSI and 210F. With a massive 1,912,000 BTU hr capacity, it ensures reliable thermal expansion protection and vacuum relief in high demand systems. The 5" probe length provides precise