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I've used this sort of thing twice.
First one worked exactly as described.
Encouraged by this, I bought a second kit, and spent several hours getting wet and annoyed. Even after turning the supply off, cleaning everything, checking for distortion and odd imperial size issues, and using jointing compound around the rubber gasket, it still pissed water everywhere.
In the end I used a pipe cutter to remove the holed section and fitted a compression Tee valve, which worked perfectly first time.
tl;dr 50% failure rate?
MrE-
Thanks, given my experience with plumbing, 50% is too low for my abilities. Threaded stuff I can do all day. I'll take another look at the run (when I can be fucked to drag the washing machine out again - the exterior wall is behind there anyway) and get some extra fittings. I reckon I can still use 90% of the kit, I just need a more foolproof way of getting the water into it.
stevo_com
I would like to install an outside tap. I bought a kit that self cuts into a cold feed without the need for turning off supply, apparently. Has anyone used these? will I be taking an inpromptu cold shower and fucking my plumbing?