Re: Leaks are usually simple to fix
This may be a tl;dr.
I tend to be the old bloke who knows a bit about it - former industrial engineer who has worked with wet, sparks and software.
Last week the neighbour called one evening to ask if I had a spanner that would do up a 22mm compression fitting. Well, I do...but he returned saying it didn't work and so I went over to take a look.
A to the best of my knowledge unqualified "plumber" was installing a new bathroom sink. But it wasn't over where the old one had been.
Had he put a crank in the cold pipe? No because it was a pedestal sink. Instead he had:
1. Cut a section out of the 22mm cold pipe under the floor.
2. Then discovered he couldn't move it to put a tee in so:
3. He cut off a bit more and put in a repair section but then
4. He put a white plastic pushfit tee between the original pipe and a stub in the repair section
(still with me?)
5. At which point he found that the repair compression joints leaked so
6. He added PTFE tape but they still leaked because the adjacent hot pipe meant he couldn't get the spanners in properly.
At this point I thought but did not say:
7. Even if he tightens it that's a compression joint under a floorboard which is going to take hours to get to if it leaks again.
8. There's side load on that plastic tee because it's all copper on both sides, so that might leak.
Now, I don't mind doing above the floor visible stuff, and I use copper pushfit. But for anything else I call in my local plumber with his certificates, 15 years of experience in his own business and his public liability insurance (and I know where he lives...). And his soldered joints for underfloor stuff.
So the point of this perhaps overly long post? For plumbing, find a decent plumber and give him enough work to ensure he comes out to you. Because the person who knows a bit about it might be me, or it might be someone who thinks you can bodge any old mess of compression, copper, plastic, pushfit and why, and so long as it isn't leaking when he leaves the premises, job done.