Anyone with ideas on how to open this shower mixer?

[azibux1]

Hi all,

Does anybody know how you would open the below? Today it has started to leak reasonably seriously, but it seems to be intermittent, a mixture of fiddling with it, turning it on and off (from here and the mains) seems to get it to stop and start again, not entirely sure where the water is coming from though, seems to leak/seep out from one of the joints where all the parts twist, which makes me think it is something loose or broken 'behind' what is shown in the picture.

Not sure where to go next to open it, which bits can and can't be opened. There are some more small grub screws in the unit near to the wall which will presumably release it from the wall (possibly allowing access to the issue from behind) but don't really want to undo those just yet (due to it being late now and currently it isn't leaking) and don't want to cause any issues with the pipes coming into the unit as we have no way (or materials like sealant etc) to get those back on if they need removing from the unit / come off in the process.

Extra info:
It has two pipes coming in (hot and cold) and one pipe out to a shower head. It is removed in the pic, but there is a cover over the front that allows adjustment for temperature. It is made by Bristan.

Any help would be great

EDIT: In the second pic, regarding the allen bolt behind the one already removed, it looks like there is one there if you look with a torch, but we tried various size ones in the hole and nothing seems to lock in to the bolt. Hard to see if there is one in the hole below (at the bottom) as there is water in this hole which shouldn't be there.

 

[chantelle]

It`s knackered unfortunately,time to replace, post here for how to replace,it`s relatively simple.

 

[azibux1]

Response from another forum

Not sure that the big nut should turn with the knurled section. It looks like that's the bit that removes the control bit from the main block.

And my response (just for extra information and ideas here)

What you're saying makes sense, and would then make it a similar style to how a basin tap is if I remember rightly. But this is quite 'defined' in the way it turns, turns quite loosely (still requires a wrench around it) round to the left then stops suddenly and the same the other way clockwise.

I did turn it all the way clockwise (off position for the shower) and put a slight amount of pressure on it to tighten it, but it didn't seem like something that should be 'tight' due to the way it moved.

Will look into this more tomorrow to see if it is the cause of the problem.

Any other ideas too?

 

[azibux1]

It`s knackered unfortunately,time to replace, post here for how to replace,it`s relatively simple.

Oh... They can't be fixed?

Do you have a link to a 'how to' installation thread here?

 

[chantelle]

Try `you tube`

 

[azibux1]

Try `you tube`

Thanks

Found out that the thermostatic cartridges have seals around them, one of which has possibly failed. And a video on how to change the seals and the cartridge itself so will look into that