Leaking Joint on Bathroom Radiator Heater

danjo-xx

Non Pressurised System:

On the joint where the pipe joins the bottom of the TRV. Its been leaking over the summer even though the system is off. I got about a 1/8" turn on the nut and fired up the boiler and the leaked stopped when rad was hot.

Still leaking just as bad when boiler is off. Don't want to risk ringing the nut...any easy way of getting some ptfe tape on the thread without draining down the system first.

Freeze the pipe first is that an option.

DoneDL

Are you sure the trv isn`t leaking. Take the head off and check if it`s not dripping down.

Sparkpea

DoneDL wrote: »

Are you sure the trv isn`t leaking. Take the head off and check if it`s not dripping down.

I personally wouldn't see many trvs leaking at the pin. If it's the nut below then I'd turn off the valves and lift the towel rad down. Then cap off the expansion pipe in the loft with a stopend and close the cold feed valve on the outlet of the header tank. If there's no valve on it then fit one. This creates a vacuum in the system. Open the offending trv valve slowly with a bucket under it, u should prob get about 5l of water into the bucket but it will then stop if the fittings at the header tank are sealed properly.

U can then take the trv off and put ptfe or jointing compound around the ring/olive and retighten.

Then fit towel rad again and remove the stop end on the expansion and open the valve for the cold feed. System should topup for the 5l removed plus whatever water is needed to refill towel rad

Micky Dolenz

Sparkpea wrote: »

I personally wouldn't see many trvs leaking at the pin. If it's the nut below then I'd turn off the valves and lift the towel rad down. Then cap off the expansion pipe in the loft with a stopend and close the cold feed valve on the outlet of the header tank. If there's no valve on it then fit one. This creates a vacuum in the system. Open the offending trv valve slowly with a bucket under it, u should prob get about 5l of water into the bucket but it will then stop if the fittings at the header tank are sealed properly.

U can then take the trv off and put ptfe or jointing compound around the ring/olive and retighten.

Then fit towel rad again and remove the stop end on the expansion and open the valve for the cold feed. System should topup for the 5l removed plus whatever water is needed to refill towel rad

Handy way of doing the above with out stop ends is using corks from wine bottles. Make ideal plugs for expansion pipes and can be paired down for 1/2" tank connectors.

Just be sure and remove after ward.

Sparkpea

yeah plugs/drain easy kits are brilliant - just didnt think many others would know what they where