This valve uses 1/4" barb connections for the common and normally closed ports

verifying a clear flue and adequate draft before the ignition sequence begins

Key Benefits Reliable Flame Detection: High-grade rod material withstands constant heat exposure to maintain a precise microamp output

this is a 1/80 HP shaded pole motor

Universal 7-Inch Fit: Precision-engineered for Utica and Dunkirk boiler models requiring a 7" vent diameter

McDonnell & Miller FS4-3T2-3/4 Switch THPU32HP7Y This valve uses 1/4" barbMcDonnell & Miller?FS4 3T2 3 4 3 4" NPT In Line Medium Flow Rate Liquid Flow Switch with Snap Acting SPDT Switch (Part Number 114900)