Hi All

We have a 10 year old VRV III where one of the 4 way valves has split. It is a complete pig to get to, right there in the middle of everything surrounded by pipes.

Does anybody have any suggestions as to how to go about removing the old one. No idea what slack or movement is available on what pipe once it is free of the valve connection. Is there an order to un-braze? There is no way a pipe cutter would fit in there plus it cannot be hacksawn out.

Personally I would scrap the damned thing because of the age and amount of work. But we have been asked to repair it. I'm not a brazing person. I can do it but not confident and I have access to somebody who can so why not abuse it??

My next question is - unsure of what material is inside the new valve - how would you prevent all that heat from transferring into the valve.

I'm not convinced this job is do-ableTBO. I think that the old valve is going to cause damage coming out and the new valve will get heat damaged going in.

Any advise please???

Cheers