the unit includes a 1/4" male NPT bottom connection and a 1/8" female NPT side connection to streamline integration into existing piping

and HRP series duct furnaces (Sizes 125-400)

this assembly provides the necessary static pressure to purge the heat exchanger of flue gases before ignition

while the integrated manual override lever and position indicator allow for streamlined field setup and troubleshooting without a time-out constraint

Its durable construction and industry-standard footprint make it a go-to HVAC pressure sensor for varied air-side applications

Watts 0384042 Valve Refrigerant the unit includes a 1/4"The Watts 0384042 (Model 740 2 30) is a high capacity boiler pressure relief valve engineered specifically for hot water space heating systems. Featuring a rugged iron body and a 2 inch FNPT inlet with a 2 1 2 inch expanded outlet, this valve is designed to manage high steam discharge rates up to 5,250,000 BTU hr. As an ASME Section IV certified safety device, the 740 series ensures critical overpressure protection by utilizing a non mechanical seat