the 661057R is specifically sized (#57) for Liquid Propane (LP) applications

it is rated for both hot water source and individual fixture applications

Any other orientation can interfere with the ball-check mechanism and lead to improper regulation or pilot outages

For proper mechanical rotation and alignment

while the 1/4-inch barbed fittings ensure secure pneumatic tubing connections

Conbraco 19-KDCA-100 Valve Els PW 17895 the 661057R is specifically sizedThe Conbraco 19 KDCA 100 Valve is a Section I steam pressure relief valve designed for high capacity overpressure protection in steam power boilers and pressure piping systems. As a direct replacement for 6010DCM01AAM0100, this Apollo 19 Series safety valve features a rugged cast bronze body with a 1 2" Male NPT inlet and 3 4" Female NPT outlet. It is factory set at 100 PSI with a certified discharge capacity of 646 pounds per hour. For maximum