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2-inch ASME water relief valve designed specifically for large-scale hot water heating boiler systems
This hot surface ignitor features a specialized ceramic body and element material optimized for the specific voltage curves of Source 1 control boards
As a direct S1-331-09171-000 replacement
you prevent common issues like voltage drops or terminal overheating caused by generic aftermarket substitutes
Automatic Reset: Resets at 505 PSI
Resideo ZD22X12TZ Damper 320788-704 2-inch ASME water relief valveThe Resideo ZD22X12TZ Damper is a professional grade 22" Wide X 12" High Parallel Blade Zone Damper engineered for high static pressure applications. Built with a heavy duty extruded aluminum frame and blades, this 24Vac zone damper features a Power Closed Spring Return Open configuration, making it the ideal choice for systems requiring a fail safe open position. The integrated synchronous motor is side mounted on the 12 inch dimension, providing