Use a straightedge and calipers across the precision-machined outside diameters of the flanges to verify parallel and angular status before tightening the set screws

Is this the same as an outdoor reset sensor

providing a consistent high-voltage spark to initiate the burner cycle

eliminating the need for piping modifications

Universal Compatibility: Engineered specifically for Raypak atmospheric pool heaters and many B6000/B2000 series commercial boilers

Johnson Controls VB-3766-1 Valve Body 30067439-890 Use a straightedge and calipersJohnson Controls VB 3766 1 Flare Valve Body, Two Way, 1 2", Push Down to Close (PDTC), 1 Cv, 1 2" Stroke, Hot and Cold Water Service, 1 4" Stem Diameter, Equal Percentage