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Adjustable strain function: This is a water pump strain control change for superb pressure control. When adjustable upward push and fall thresholds are reached, a pressure swap with a 40-60 psi strain atmosphere differ prompts the electrical water pump within the energy circuit. Widely used: 1/4 inch internal thread NPT, regular properly pump substitute switch, designed for all kinds of electric properly pumps (jet, submersible, reciprocating, etc.). Premium material: the strain management change is manufactured from fine materials with immoderate energy and durability. The contact could be opened when the pressure rises, extending the service life. Easy to use: water pressure control is simple to use, steady performance, motor protection, power saving, long-term use. Material: plastic colour: gray Package Contents: 1 x strain substitute for correctly pump Only the above package content, other item are usually not included. Note: Light reflection and various reveals can cause the color of the object in the photo somewhat assorted from the genuine thing. The size allowed error is +/- 1-3cm.