A few months ago I had a new combi boiler installed which uses a sealed system to heat the radiators. The old system used a header tank in the loft but this is now redundant.
I have recently noticed a problem with one radiator whereby the valve connection to the rad tail is leaking slightly. No problem I thought, simply tighten the nut with waterpump pliers. However, the nut appears seized and any force causes the valve to try and turn, potentially cracking the copper supply pipe. On inspection, the nut looks like its been sealed with somethink like boss white. IM guessing that the whole lot is seized up solid.
I have isolated the radiator by turning off the supply and lockshield valves. The slow trickle from the leak has now virtually stopped so I guess the rad is now nearly empty.
IM hoping someone can give me some ideas on how to fix this leak. Some options IM considering:-
- Hold rad valve steady with big set of waterpump pliers whilst undoing seized nut with even bigger wrench. Will heating the seized nut help?
- As there is no drain valve in the whole CH system, I cant drain the system and remove the valve from the supply pipe. Is it worth using a freezing kit to help with this ?
Even if I do manage to get the seized nut undone how would reseal it to ensure no leaks?
All info welcome
I have recently noticed a problem with one radiator whereby the valve connection to the rad tail is leaking slightly. No problem I thought, simply tighten the nut with waterpump pliers. However, the nut appears seized and any force causes the valve to try and turn, potentially cracking the copper supply pipe. On inspection, the nut looks like its been sealed with somethink like boss white. IM guessing that the whole lot is seized up solid.
I have isolated the radiator by turning off the supply and lockshield valves. The slow trickle from the leak has now virtually stopped so I guess the rad is now nearly empty.
IM hoping someone can give me some ideas on how to fix this leak. Some options IM considering:-
- Hold rad valve steady with big set of waterpump pliers whilst undoing seized nut with even bigger wrench. Will heating the seized nut help?
- As there is no drain valve in the whole CH system, I cant drain the system and remove the valve from the supply pipe. Is it worth using a freezing kit to help with this ?
Even if I do manage to get the seized nut undone how would reseal it to ensure no leaks?
All info welcome