While you can use a metal tank wall as a ground reference

Operating on a standard 120Vac/60Hz power supply

Industrial Durability: Features a corrosion-resistant finish and heavy-duty bearings to withstand the harsh conditions of exterior wall-mount units

With its robust internal windings and high-grade bearing system

typically required for automated temperature reset controls

Sporlan 900444P Regulator 321702-401 While you can use aThe Sporlan 900444P, also identified as the CRO 6 0 60 7 8" ODF Regulator, is a high performance crankcase pressure regulating valve designed to prevent compressor motor overload. By limiting the suction pressure at the compressor inlet to a predetermined maximum, this adjustable pressure regulator protects the system during and after a defrost cycle or following a normal shutdown period. Built with a brass body and 7 8" ODF copper solder connections,