Watts B548-02AHC Regulator 320734-701 verify the 3A fuse and

verify the 3A fuse and 24V transformer output

and fan-coil units originally equipped with the specified motor platform

this 1/70 HP unit is purpose-built to purge the heat exchanger and establish the negative pressure required to close the furnace pressure switch

Enhanced Safety: Includes built-in pressure taps on the inlet and outlet for rapid manifold pressure verification during startup

Corrosion-Resistant Construction: Heavy-duty materials resist the corrosive effects of stagnant condensate and HVAC chemicals

Watts B548-02AHC Regulator 320734-701 verify the 3A fuse andThe Watts B548 02AHC Regulator is a precision engineered 1 4" NPT filter regulator specifically designed for high sensitivity pneumatic control and HVACR instrumentation. As a veteran grade compressed air regulator, this "MiniFiltReg" combines a 20 micron polypropylene filter element with a relieving type pressure regulator to ensure clean, stable airflow in space constrained installations. This Parker Watts B548 series unit features an aluminum body