Pentair MasterTemp/Max-E-Therm Combination Gas Valve (42001-0051S)

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This replacement MasterTemp and Max-E-Therm Combination Gas Valve gives technicians and pool owners a focused way to repair the affected assembly without replacing more equipment t han necessary. It is controls gas delivery within the heater combustion system and is a critical safety-related service component.Because gas valves affect ignition, burner performance, and fuel shutoff behavior, installation should be handled by a qualified professional using the proper diagnostic process. Always compare the existing part, equipment label, installation date notes, and part number 42001-0051S before finalizing the repair. Supports controlled fuel delivery to the burner. Used in heater repair involving gas train issues. Requires professional installation and leak testing. This is a practical replacement choice for maintenance teams, pool professionals, and homeowners who want the right fit for a dependable equipment repair. Show more