Enhanced Safety: The internal relief valve protected by a 1" NPT vent and stainless steel screen prevents overpressure conditions

This differential air pressure switch is designed for air or combustion gases that are non-corrosive to silicone and plated steel

Technicians should look for increased acoustic noise

resulting in improper airflow regulation and compromised static pressure

Armstrong Fluid Technology AS1270-380 O-Ring 328140-751 Enhanced Safety: The internal reliefThe Armstrong Fluid Technology AS1270 380 O Ring is a precision engineered EPDM rubber seal designed specifically for 10 inch pump side connection suction guides. Featuring a 11. 475" ID x 0. 210" CS configuration, this EPDM cover O ring ensures a high integrity, leak proof seal within demanding HVAC pumping systems. Engineered for dimensional stability, this Armstrong pump replacement part maintains its physical properties across varying temperature