Repairing Compression Joints
Most leaks on compression fittings are caused by over or under tightening. To determine which it is, if there are any threads showing try tightening the cap nut half a revolution. If the fitting still leaks or there is no threads left, you will need to drain the pipe and dismantle the leaking side of the fitting.
Check the pipe goes right up to the internal stop, if it doesn't try pushing the pipe fully into the fitting. If the pipe is too short a new piece will need to be fitted.
If the olive looks OK then wrap about eight turns of PTFE tape around the olive and remake the joint. If the olive looks damaged or worn remove the olive and fit a new one. To remove the old olive, try turning and pulling the olive off by hand. If the olive is tight then try the following steps.
