I am looking to replace the mid-position valve on my central heating as its started to fail to close off properly. Unfortunately its one of the older types which are all one unit. I have the new part all ready to fit but finding it slightly tricker than I thought it would be to get the old one off.
I attempted to undo the nut on the input side of the valve first as it does not have a 'bit' on it to put a second spanner on to help provide tension so have to use the existing pipework to stop it spinning.
While trying to undo the nut I found the unit twisting quite a bit and moveing the pipe which goes into the cylinder. It was moving it a lot more than I thought it would.
As a result i stopped as I did not want to break the connection of the pipe going into the hot water cylinder.
This system must be a good 15+ years old so its not supprising the nuts are quite well done but how much force would you expect to be needed to undo the nuts? Would you expect it to almost bend the other pipes coming out the outlets?
I attempted to undo the nut on the input side of the valve first as it does not have a 'bit' on it to put a second spanner on to help provide tension so have to use the existing pipework to stop it spinning.
While trying to undo the nut I found the unit twisting quite a bit and moveing the pipe which goes into the cylinder. It was moving it a lot more than I thought it would.
As a result i stopped as I did not want to break the connection of the pipe going into the hot water cylinder.
This system must be a good 15+ years old so its not supprising the nuts are quite well done but how much force would you expect to be needed to undo the nuts? Would you expect it to almost bend the other pipes coming out the outlets?
