Any idea how to remove shower cartridge

[SamyH]

Hi,

I'm trying to remove the cartridge on this exposed shower mixer, but I can't for the life of me figure out what comes off next. I've removed the flow control handle and the little grub screw inside. I'm thinking I need to unscrew the outer chrome ring where the flow handle was connected, but it won't move when turning left. I thought maybe the cartridge just pulls out from here, but don't want to try that without checking with someone who has experience of these things.

Any advice is appreciated

 

[Madrab]

Look like it's all full of scale, you need to use a limescale eater on that first. Once the grub screw is removed then the outer/inner temp ring would either screw or pull off (from the tight fitting I would suggest the latter, may need persuaded). That should then give access to the inner valve assembly.

 

[SamyH]

OK thanks so lefty loosey on the outer ring is correct next step just need to get myself some giant circular wrench and some limescale eater then. Would wd40 be a good idea in there too? Thanks for the help

 

[opps]

Boa wrenches are great for that kind of thing- no risk of scratching the chrome

Boa Constrictor Strap Wrench

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[DiyNutJob]

Would wd40 be a good idea in there too?

It can't do any harm. Give it lots of jiggles.

 

[SamyH]

Cor blimey nearly gave myself a hernia but it's off, so I guess the cartridge is all the brass parts - if I just take it all up to the local plumbing shop they should be able to sort me out thanks guys perseverance pays off

 

[denso13]

if I just take it all up to the local plumbing shop they should be able to sort me out

If it's reasonably common, there are literally hundreds of different kinds though.

 

[SamyH]

I have no idea will check online to see if there's anything that looks like it - that top piece is the cartridge itself I assume. The problem I was having is that it would go from hot to cold within a 2 degree turn of the temp control - so it's right to replace the cartridge right? Probably should have started with that question

 

[denso13]

This site has loads of you know the make, https://www.showerdoc.com/cartridges/cartridges