Square D Pumptrol 20 - 40 psi Diaphragm Actuated 2 Pole Pressure Switch SKIL and the screw thread is

and the screw thread is specially annealed to make sure that it is not easily broken

it is the lightest professional drain line machine

Applications include interior and exterior finish and trim

With a 1-5/8 In

Built-in AUX for when radio and Bluetooth are not available

Square D Pumptrol 20 - 40 psi Diaphragm Actuated 2 Pole Pressure Switch SKIL and the screw thread isDesigned for the control of electrically driven water pumps. Compatible with jet pumps, submersible pumps, and reciprocating pumps. Includes pulsation plug designed to protect pressure switch components from a plumbing system that may experience water hammer. Diaphragm actuated, 2 poles, 1 4 In. 18 NPSF (internal thread).