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This OEM Weil McLain gasket is engineered to withstand the thermal cycling associated with condensing boiler operations
verify the vented draft inducer and heat exchanger integrity before replacing the furnace control module
What air quality is required for long-term reliability
05" to 9" WC
Common Questions: What boiler models use the Weil McLain 511-842-370
Spence Engineering D550 Pilot 30067439-890 This OEM Weil McLain gasketThe Spence Engineering D550 Pilot is a heavy duty, spring operated pressure pilot designed to interface with Type E and Type C main valves for high accuracy steam regulation. Constructed with a rugged cast iron body, this normally closed pilot is specifically engineered for secondary pressure control in steam heating systems and industrial vapor applications. It features a 5 50 PSI spring range, allowing contractors to field adjust delivery setpoints
US$ 14.95
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US$ 28.00
