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I've replaced a leak at the taps with a peak here ok both the cold and hot pipes. Any ideas? Or will the ballofix valve need a replacing? I'm wondering just accepting defeat and getting a plumber in. The missus favours that idea
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swmlon
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The ball-o-fix are prone to leaking, replacement is easy as long as you can turn off the main cold water supply. In London that is often in a box in the street but occasionally it's concealed indoors or the street stopcock is not working/accessible for some reason.
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Compression fittings need everything to be absolutely perfect or they just won’t seal. Check there’s no debris or corrosion on the mating surfaces first. Clean it up with wire wool if you need to. Then a couple of turns of PTFE tape round the olives and re-assemble and it ought to seal it if that’s where the leak is.
Also, as mentioned above, the ball in those isolators are notoriously prone to failure and leaking. Try the joint first, but you might just need to get another one from Wickes/B&Q/Screwfix/Plumbase/Homebase etc. Then make sure you re-assemble it with PTFE tape so you don’t have to take it off again.
Airhead
Jonny69
It's a tube of sealant. You can put a little bit on the connections before you fit them and it saves any tiny leaks. You really only need a tiny amount but it lasts quite well in the tube and it's worth having if diy plumbing is in your future.