- 1). Shut off the water supply to the plumbing area before beginning the repair. If the plumbing is in a sink or a toilet, look at the wall behind or beneath them to find the shutoff valve. Turn the valve clockwise to close it. Other shutoff valves may be in the basement or crawlspace.
- 2). Lay an old towel under the plumbing, if possible, to protect the surrounding areas from damage.
- 3). Brush away any visible areas of corrosion on the plumbing using a wire-bristled brush. Scrub vigorously and concentrate on any seams or joints to break through the corrosion.
- 4). Pour 1 to 2 tbsp. of white vinegar over the corroded areas to help dissolve some of the rust and mineral buildup. Wipe the plumbing with a rag.
- 5). Spray a liquid lubricating oil onto the plumbing, saturating all areas of corrosion and the seams or nuts that hold the pipe in place. Allow the pipe to sit for 30 minutes to one hour to dissolve the corrosion. If time is not a factor, it's best to allow the oil to penetrate for 24 hours.
- 6). Place a wrench around the plumbing nut or other connector and turn it counterclockwise with firm force to remove it.
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