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Always verify your specific unit's wiring diagram to ensure the 155-20F specification matches
Always verify the CV rating and valve series on the nameplate before installation
There is no functional or technical difference between these two parts
Are these fittings compatible with aluminum tubing
Weil McLain 510-218-099 Gauge Always verify your specific unit'sThe Weil McLain 510 218 099 is a high precision, dual purpose combination pressure temperature gauge designed for immediate integration into hydronic heating systems. Engineered for reliability in standard residential and light commercial boiler applications, this OEM replacement gauge features a 2. 5 inch high visibility dial with a dual scale interface, providing simultaneous readouts for system pressure and water temperature. The analog display
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