When it fails to perform either function correctly, it’s time to remove the switch and install a new one. You don’t have to call a plumber for this simple operation. If you know how to use an adjustable wrench and a screwdriver, you can do this one yourself.
Things You Will Need
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Turn off electrical power to the well at the service panel.
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Open the faucet under the pressure tank. Allow the tank to empty. If the plumbing underneath the tank is not equipped with a drain valve, open the closest faucet.
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Unscrew the acorn nut on the top of the pressure switch and remove the cover.
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Use a screwdriver to remove the wires from the switch’s four terminals. Remove the ends of the wires from the switch.
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Place your adjustable wrench on the hex nut on the underside of the pressure switch. Turn the pressure switch counter-clockwise to remove it. Leave the 1/4-inch nipple underneath the switch in place.
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Clean the 1/4-inch nipple’s threads with a wire brush. Cover the threads with three wraps of plumber’s tape.
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Thread the new switch onto the nipple. Tighten the switch with an adjustable wrench.
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Connect the two wires from the pump to the terminals marked “T1” and “T2”. Put the black wire on “T1” and the white wire on “T2.”
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Connect the two wires from the service panel to the terminals marked “L1” and “L2.” Put the black wire on “L1” and the white wire on “L2.”
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Place the cover on the switch and tighten the acorn nut by hand. Do not use a wrench.
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Close the faucet you used to drain the tank.
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Turn the power on at the service panel. Check for leaks as the pressure builds in the tank.
The Drip Cap
- The pressure switch on your well is responsible for automatically sensing the need for more water in your pressure tank and supplying power to the pump.
- Open the faucet under the pressure tank.
- Use a screwdriver to remove the wires from the switch’s four terminals.
- Put the black wire on “T1” and the white wire on “T2.” Place the cover on the switch and tighten the acorn nut by hand.