I've just drained down and flushed my system with the intention of fitting TRVs to 8 out of the 13 rads in the house ready for winter. The existing valves are 'Wasp Ten' wheelheads at both sides of each rad.
I managed to get the old valves and tails off without any problem, fitted the new Danfoss RAS-C2 valve and a new lockshield, but now the whole setup is about 20mm too wide to fit on the pipes. The issue seems to be that the old tails are shorter, and has the hex hole to tighten them up, whereas the new ones are a bit longer, with flats on the outside to tighten them up. Unfortunately they are different threads on the outgoing as well...
I've tried chipping out a bit of the floor to move the pipes across, but it is concrete and there's not enough movement to make it work, and all the downstairs rads are going to be the same. I can't find anywhere that sells 'short' radiator tails, and its too short of a distance to put two elbows on the pipe. From looking online most TRVs seem to have very similar tails so I'm a bit reluctant to go and buy a load to try.
Does anyone have any ideas on how I can get around this? Is there a secret supplier of tails that I don't know about? Am I going to have to buy new rads all round and modify the pipes to fit?
Here's a pic showing the differences between old and new
I managed to get the old valves and tails off without any problem, fitted the new Danfoss RAS-C2 valve and a new lockshield, but now the whole setup is about 20mm too wide to fit on the pipes. The issue seems to be that the old tails are shorter, and has the hex hole to tighten them up, whereas the new ones are a bit longer, with flats on the outside to tighten them up. Unfortunately they are different threads on the outgoing as well...
I've tried chipping out a bit of the floor to move the pipes across, but it is concrete and there's not enough movement to make it work, and all the downstairs rads are going to be the same. I can't find anywhere that sells 'short' radiator tails, and its too short of a distance to put two elbows on the pipe. From looking online most TRVs seem to have very similar tails so I'm a bit reluctant to go and buy a load to try.
Does anyone have any ideas on how I can get around this? Is there a secret supplier of tails that I don't know about? Am I going to have to buy new rads all round and modify the pipes to fit?
Here's a pic showing the differences between old and new