Thermostatic cartridge issue

[ajt2018]

Hello,
I have an old Tritan Thames concentric mixer shower I am trying to replace the thermostatic cartridge.

Due to the faulty part being old it appears seized within the housing. Any ideas how I can remove it from the brass ring to put the new one in.

I have tried various things but nothing has worked so far.

Thanks

 

[ShaunCorbs]

Vice and some heat via a blow torch

 

[ajt2018]

Vice and some heat via a blow torch

Shaun- thanks for response, I’ve just tried that and it didn’t work. I think it’s because there is nothing for the mole grips to turn on as the bit that needs to come out is circle shaped.

 

[ShaunCorbs]

Shaun- thanks for response, I’ve just tried that and it didn’t work. I think it’s because there is nothing for the mole grips to turn on as the bit that needs to come out is circle shaped.

Need a pair of grips / pump pliers guess you could try putting the brass in the vice (not the ring)and turn the body ?

 

[dancinplumba]

Looking at it , would it not be better to change whole valve, easier too

 

[ShaunCorbs]

Looking at it , would it not be better to change whole valve, easier too

I'm guessing they don't sell the brass bit / it's not supposed to come out with the cartridge

 

[dancinplumba]

I'm guessing they don't sell the brass bit / it's not supposed to come out with the cartridge

thought it looked odd

 

[ajt2018]

Need a pair of grips / pump pliers guess you could try putting the brass in the vice (not the ring)and turn the body ?

Shaun- tried it for quite a while with water pump pliers and mole grips and blow torching both sides. I think because it’s so old it doesn’t want to move.

 

[Ben-gee]

Use a pair of stilsons, and if that doesn't work use a bigger pair. I start at 12's and so far only ever got up to 36" before stuff gives in! I have access to 60" stilsons if necessary but need four string men to lift them.

 

[ShaunCorbs]

Shaun- tried it for quite a while with water pump pliers and mole grips and blow torching both sides. I think because it’s so old it doesn’t want to move.

Need to be hotter then

 

[Ben-gee]

Mole grips are not man enough for this job

 

[Welder]

I'd not get too physical with it personally. Instead I'd soak it hot/warm descaler for a few days. The issue is its bonded together by the limescale so breaking down those bonds which will as strong as the metal is vital.

 

[ajt2018]

I'd not get too physical with it personally. Instead I'd soak it hot/warm descaler for a few days. The issue is its bonded together by the limescale so breaking down those bonds which will as strong as the metal is vital.

Dave- thanks for the helpful suggestion.