Hello, i'm a novice plumber/diyer and have just fitted a downstairs toilet for a friend. the plumbing was pretty simple but how can i be sure that the compression jionts used are sound and wont pop off with the pressure of the toilet. when it flushes there is slight movemnt in the pipe will that affect the joints.
The best way of checking and the way you're taught at college - is to make the joint then undo and check the ring/olive for movement, apply PTFE (if needed, normally not) and re-joint.
You then know the joint is sound, if you do not check you do find sometimes (brass olive/ring mainly, the copper ones are much softer and the joints are made much easier) the olive doesn't compress onto the pipe properly and it will leak - if not immediately, then eventually.
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