- 1). Turn the pool pump's power switch off at the pool's electrical control panel. Open the compartment lid on the pool deck to reveal the pool pump plumbing assembly. Rotate both of the water valves inside the compartment clockwise to stop the flow of water. Stop rotating the valves when the resistance is too great to continue.
- 2). Insert a Phillips screwdriver into the center of the knob that is attached to the valve that is next to the PVC pipe that distributes the water to the pool. Remove the screw from inside the valve, using the screwdriver. Place the screw in your pocket to keep it from getting lost.
- 3). Place the jaws of an adjustable wrench around the bottom of the knob attached to the the valve pipe that just had the screw removed from it. Adjust the jaws to tightly grip the knob. Twist the wrench counterclockwise to loosen the knob from the valve. Rotate the wrench counterclockwise until the knob comes free. Pull the knob off the valve pipe and place it aside.
- 4). Place the wet/dry vacuum cleaner next to the compartment. Set the switch on the vacuum to "Exhaust" (or a similarly named option, depending on the make). Place the end of the hose attached to the vacuum over the hole at the top of the valve pipe. Wrap a strip of duct tape around the end of the hose where it meets the valve pipe.
- 5). Turn the vacuum on. Watch to see if bubbles begin to form from the surface of the PVC pipe. If you see bubbles, then there is a leak in the PVC pipe, as the air is being forced out of a hole. You can turn the vacuum off, remove the hose and repair the hole in the PVC pipe before reassembling the valve so the pool pump plumbing can again work efficiently.
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