Watts 0121504 Valve Freon The internal 40 VA transformer

The internal 40 VA transformer operates on a 120V primary input and steps down to a 24V secondary output for use with standard 24V thermostats and controllers

This dual-rated component provides the specific capacitance required to support both the compressor and the condenser fan motor within a single residential or light commercial AC unit

As an auto reset HVAC limit switch

This furnace limit switch features a manual reset mechanism

Its patented conductivity-based sensing technology distinguishes between actual low water conditions and water volatility

Watts 0121504 Valve Freon The internal 40 VA transformerThe Watts 0121504, officially designated as the LF174A 125 1, is a heavy duty, lead free boiler pressure relief valve engineered for high capacity protection in hot water heating and domestic supply systems. This 1 inch NPT valve is ASME Section IV rated, featuring a 3,215,000 BTU hr steam discharge capacity at its fixed 125 psi setting. Constructed with a lead free copper silicon alloy body, it ensures compliance with modern potable water regulations