it provides a reliable normally-open circuit that closes when the proper negative pressure is achieved

Precise 125 PSI Setting: Factory-tested to ensure accurate discharge and protecting the ASME pressure vessel from structural failure

Precise Flow Control: Equal percentage flow characteristic for stable and accurate modulation in variable flow hydronic systems

and AirEase furnace models requiring a 0

Watts 0364195 Valve 30067439-890 it provides a reliable normally-openThe Watts 0364195, also identified by model 415 1 1 4 15, is a high capacity steam pressure relief valve engineered specifically for low pressure steam heating boilers. This ASME Section IV rated valve features a 1 1 4 inch NPT threaded inlet and a 1 1 2 inch NPT outlet, providing a substantial discharge path for overpressure protection. Set at a precise 15 PSI pressure relief, this unit is rated for a steam capacity of 1,265 lbs hr, ensuring it can