What is the difference between a two- and three-wire pump?

To the end-user, both two- and three-wire pumps do the same job. Well pumps are induction motors that require a start-and-run capacitor. A two-wire pump includes these components as part of the pump motor. A

three-wire pump has a start/run capacitor which is separate from the pump and located in a box (usually next to the house lateral in the basement or crawl space). One advantage to the three-wire pump is the ability to convert it to a constant pressure system, although some manufactures are now building constant pressure systems for two wire pumps.

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Recent FAQs

What is a well screen?

If the bottom of the well is in sand and/or gravel, the well driller may install a well screen. The well screen is a metallic cylindrical sieve-like structure which is usually attached to the bottom of the well casing or other water intake areas.

What is a pump screen?

A pump screen is a combination of a coarse stainless-steel shield and a fine screen that completely covers the pump. This disallows sand and gravel particulates from entering your water feed stream. This does slow the gallons per minute (GPM) of the pump while still allowing enough water to supply the house.