Using an OEM-spec 51561-1 replacement fan blade prevents common field issues like motor overheating

Adjustable Pressure Settings: The pressure reducing valve comes factory set at 12 PSI but is easily field-adjustable to meet specific head pressure requirements

this valve is engineered for durability in low-pressure systems ranging from 0 to 125 PSI

While optimized for natural gas

and Dunkirk Empire II Series II boilers

Dwyer Instruments 1823-10 Pressure Switch 320735-701 Using an OEM-spec 51561-1 replacementFor technicians and contractors requiring reliable airflow monitoring, the Dwyer Instruments 1823 10 Pressure Switch delivers professional grade precision in a compact footprint. This low differential pressure switch is engineered for a range of 2. 0" w. c. to 10" w. c., making it an ideal choice for HVAC mechanical equipment control and industrial process applications. It features a single pole double throw (SPDT) switch configuration, allowing for