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- Well cap. The casing sticks up at least 1 foot above the ground, with a sealed cap.
- Pitless adapter. Usually 6 or 7 feet down, below the frost line. The water line to the house leaves here.
- Casing and grout. Steel or plastic pipe, 4 to 6 inches wide and at least 15 feet deep, sealed on the outside with grout.
- Pump. Most drilled wells have a submersible pump down in the water.
- Pressure tank. Stores water under pressure so the pump doesn't run every time you open a tap.
Drawing based on MDH's Well Owner's Handbook. Not to scale.