Moonshine Posted March 26, 2020 Share Posted March 26, 2020 I have just fitted a new radiator, and put new valves on it. There were two connection pipes from the valve to the radiator, one had a square nut, and the other had a 6 sided nut. Are these supposed to go on a particular way/side? I say this as one end of the radiator is weeping, I have put the square connector on the outlet. But now looking at all the other radiators in the house, the square connector is on the inlet. Have I got them the wrong way round? Link to comment Share on other sites More sharing options...
ProDave Posted March 26, 2020 Share Posted March 26, 2020 Pictures? Link to comment Share on other sites More sharing options...
Moonshine Posted March 26, 2020 Author Share Posted March 26, 2020 Link to comment Share on other sites More sharing options...
ProDave Posted March 26, 2020 Share Posted March 26, 2020 Where is the leak. They are essentially the same fitting, one is made by whoever made the lockshield valve, the other is made by whoever made the TRV. All the parts that came with the TRV should stay together. It does not matter which goes in which end of the radiator. 1 Link to comment Share on other sites More sharing options...
MikeSharp01 Posted March 26, 2020 Share Posted March 26, 2020 (edited) The square nut one is designed to allow a little adjustment to length you can slide the olive along a bit if things don't quite line up. Also to be clear I think that Dave means that it does not matter which end has which fitting but the flow to the TR valve does usually matter. Edited March 26, 2020 by MikeSharp01 Link to comment Share on other sites More sharing options...
JFDIY Posted March 26, 2020 Share Posted March 26, 2020 I've started using loctite 55 sealing rope instead of PTFE tape, all the jobs I've done, probably 20 joints or so (DIY not pro) have been leak free first time. Link to comment Share on other sites More sharing options...
Moonshine Posted March 26, 2020 Author Share Posted March 26, 2020 Thanks for the replies, good to know it's not on the wrong side. Looks like I will need to drain the rad and put more PTFE on it. @JFDIY I will look at that product in the future. Link to comment Share on other sites More sharing options...
wozza Posted March 26, 2020 Share Posted March 26, 2020 The square nut that you refer to is called a tail - you can buy new radiator tails. The TRV should really go on the flow side (easy to check - just see which pipe gets warm first) but most TRVs are now bi-directional and the good ones work fine on the flow or return. Link to comment Share on other sites More sharing options...
Moonshine Posted March 27, 2020 Author Share Posted March 27, 2020 12 hours ago, wozza said: The square nut that you refer to is called a tail - you can buy new radiator tails. Thanks, i didn't know that. I drained it last night and put a load of PTFE on the tail thread, and this morning there isn't any puddle under the rad. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now