Members get up to 40% off during MyLowe’s Rewards Week. Shop Now >

Link to Lowe's Home Improvement Home Page

Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

ProPlumber 30/50-PSI Plastic/Steel Pressure Switch

Get Pricing & Availability

Signals the pump to start when the water system drops to 30 psi (factory set) and stops at 50 psi (factory set)
Can be wired 115 volt or 230 volt
This switch is equipped with a low-level cut-off arm that automatically shuts off a well pump when there is a dramatic decrease in pressure, such as a leak in the discharge pipes or a faulty pressure tank

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

FREE Shipping

Delivery is on us for orders over $45. Some exclusions apply.

This pressure switch signals the pump to start when the water system drops to 30 psi (factory set) and stops at 50 psi (factory set). This switch is to be used with submersible well or jet pumps. It can be wired 115-volt or 230-volt. This switch must be used in conjunction with a well pressure tank. The air pressure in the well tank, when empty of all water, must be set to 28 psi, or the switch will not operate properly. This switch is equipped with a low-level cut-off arm that automatically shuts off a well pump when there is a dramatic decrease in pressure, such as a leak in the discharge pipes or a faulty pressure tank.

Signals the pump to start when the water system drops to 30 psi (factory set) and stops at 50 psi (factory set)
Can be wired 115 volt or 230 volt
This switch is equipped with a low-level cut-off arm that automatically shuts off a well pump when there is a dramatic decrease in pressure, such as a leak in the discharge pipes or a faulty pressure tank
When first running the pump after installing the switch, hold the lever in the start position until pressure reaches 30 PSI
For use with submersible well or jet pumps (that can create up to 50 pounds of pressure)
Motor wires are connected to the 2 middle posts (color does not matter); Breaker box wires are connected to 2 outside posts (color does not matter)
2-spring design allows for adjustment of cut-in and cut-out pressure settings
Adjustments to springs should only be made by users with good knowledge of well systems
Tank must be in good condition in order for this to work properly