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the 9E is EPDM rubber
Always replace a HVAC pressure switch with one that matches the specific "Water Column rating labeled on the manufacturer's data tag to ensure the system trips at the correct threshold
Common Questions Which boiler models use the 511-330-221 assembly
The 940-C411-89 is the current OEM service replacement for the older 040-0150-11 part number
Maxitrol RV91-2 Regulator THPU32HP7Y the 9E is EPDM rubberThe Maxitrol RV91 2 is a high capacity straight thru flow (STF) gas pressure regulator designed for superior performance in large scale residential, commercial, and industrial gas applications. Featuring a 2" NPT connection, this regulator utilizes a unique conical valve design that allows gas to flow directly through the body without directional changes, significantly reducing turbulence and increasing 3275 CFH flow capacity. It is engineered to
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