A small leak is found on a compression fitting on the cold water supply pipe to a CWSC. What initial action should be taken

• A. Attempt to re-tighten fitting
• B. Replace the fitting
• C. Apply sealant
• D. Turn off water and replace the pipe

Answer: (A)

A small leak at a compression fitting usually means the nut has loosened or the olive isn’t fully seated, so the first step is to re-tighten the nut just enough to reseat the olive and restore the seal. Tighten carefully using proper technique to avoid crushing the olive or deforming the pipe, then re-check with the water turned back on. If the drip continues after a careful re-tighten, the fitting or olive may be damaged and will need replacement. Sealant isn’t used on compression fittings, and replacing the pipe or applying sealant isn’t the appropriate initial action for a minor leak at this joint.