I’ve searched and read many tips and quite a few questions on here but I’m still totally stumped!
I have a bathroom single lever mixer tap, and I’m 90% sure the cartridge needs replacing so thought I’d give it a go as it seemed pretty straight forward. I removed the handle of the tap, no problem, but the decorative bonnet (I’ve seen it referred to as a bonnet and a sheath) is not budging!!!
I have tried white vinegar to remove limescale, I’ve tried oust to remove limescale, I’ve tried WD40 to lubricate, I’ve tried a strap wrench but can’t get a good grip because of the angle of the bonnet, I’ve tried heating it up with a hairdryer, I’ve tried pouring some boiling water over and using rubber gloves to twist it. Nothing is working. I’ve left oust most of the day and separately left WD40 overnight and neither seems to have helped…
A decent amount of gunk must have been dissolved as before the liquid would just sit at the top and it now oozes through suggesting it’s working it’s way through the thread?
Please any tips, advice, anything would be greatly appreciated! I’m not sure I’ve tried the "heating" methods enough to get it hot enough but I don’t know how hot it needs to be?
Calling a plumber is an absolute absolute last resort and any way I don’t have to would be preferable!
Pictures of tap for reference
Thanks to the suggestion of @JACK I bought a slip joint wrench which worked! I had to use some first aid stretch fabric strapping tape and a cloth over the bonnet to both get a grip of the strangely angled thing and not completely gouge it (tried electrical tape which I read somewhere else and it just slipped straight off) but it finally gave way and I've managed to remove the faulty cartridge!
Thank you @JACK !!!!
Answered by GiveItATry on December 20, 2020
You might try loosening the adjustment ring, the brass ring with two slots for a spanner wrench that's inside the bonnet of many single-handle faucets.
Those spanners often come with faucet repair kits, along with springs, O-rings and other parts, but could be easily fabricated with some heavy-gauge sheet metal and two bolts with nuts; file the end of the bolts to fit the slots.
That said, the adjustment ring could be frozen as badly as the bonnet. Recently, I had to replace a similar faucet; the bonnet was stuck so tightly that on turning it with a large strap wrench, a rusted bolt holding the faucet to the sink broke! In that case, it was not a loss, because I had planned already on replacing the ancient faucet.
Answered by DrMoishe Pippik on December 20, 2020
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