Watts 0121515 Valve 340155-7026 or a "clicking" sound originating

or a "clicking" sound originating from the wire during the ignition sequence rather than at the igniter tip

Broad Media Compatibility: The stainless steel sensor diaphragm supports universal application with water

or if the regulator fails to respond correctly to changes in burner air pressure during Selectra modulation

Optimized for Propane: Specifically calibrated for LP gas heating systems with a fixed 10" WC pressure setting for consistent burner performance

Watts 0121515 Valve 340155-7026 or a "clicking" sound originatingThe Watts 0121515 (Model LF174A 60) is a heavy duty, lead free boiler pressure relief valve engineered specifically for high capacity overpressure protection in hot water heating and domestic supply systems. Featuring a 1. 25" NPT female inlet and outlet, this valve is factory set to 60 PSI and delivers a significant steam discharge capacity of 2,847,000 BTU hr. Its ASME Section IV certified design ensures reliable performance in commercial and