Carrier HH18HA130 Limit Switch 322838-754 3 gallon thermal expansion tank

3 gallon thermal expansion tank engineered to manage pressure fluctuations in potable water systems

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Carrier HH18HA130 Limit Switch 322838-754 3 gallon thermal expansion tankThe Carrier HH18HA130 is a high precision, OEM auto limit switch designed for critical thermal regulation within residential and light commercial HVAC systems. This disc type temperature actuated switch features a specific operating range of 100 130F, functioning as a primary safety mechanism to prevent heat exchanger damage and ensure efficient blower motor cycling. As a direct replacement for the HH18HA130B, this component maintains strict 1 2" NPT