Step 3 · Disconnect Plumbing and Electrical
First, carefully disconnect the electrical wires from the pressure switch. Use a screwdriver to loosen the terminal screws and pull the wires free. Next, use two pipe wrenches or a pipe wrench and channel-lock pliers to disconnect the main water line from the tank tee. Use one wrench on the fitting and the other on the tank tee itself, applying opposing force to prevent twisting the pipes. For PVC, you may need to cut the pipe with a hacksaw or PVC cutter if it is cemented in place.