it requires a minimum differential pressure (usually 5 PSI) to open and remain stable during operation

effectively preventing premature motor failure caused by corrosion or electrical shorts

preventing localized overheating and potential safety switch trips

and Coleman equipment to ensure electrical and mounting compatibility

Direct replacement for legacy part numbers S1-2702-335P and 129694

Armstrong Fluid Technology 272005-300 Hydronic Accessory 322838-754 it requires a minimum differentialThe Armstrong Fluid Technology 272005 300, also known as the Model AVA 013, is a high performance hydronic accessory designed for the continuous removal of trapped air in heating and cooling systems. Built with an automatic air vent mechanism and a durable brass body, this component ensures peak system efficiency by preventing air related issues such as corrosion, cavitation, and excessive operating noise. This specific model features a 1 8" Male NPT