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What are the primary applications for the Siemens 331-4313
Built with a corrosion-resistant bronze body and finished in polished chrome
Common Questions Is the Robertshaw 700-503 compatible with LP gas
or erratic water levels
It is a direct replacement for the legacy AT-603 and AT-603-756 models
Lochinvar & A.O. Smith 100109925 Switch 321042-401 What are the primary applicationsThe Lochinvar & A. O. Smith 100109925 Blocked Inlet Switch is a critical safety component designed for high efficiency gas fired boilers and commercial water heaters. This normally closed (NC) pressure switch is calibrated to a 1. 0 inch water column set point, ensuring the combustion blower maintains proper airflow for safe ignition. If the intake system encounters excessive static pressure due to blocked air intake pipes, debris in the mesh screen,
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