Leak sealer and microbore

[Tuharax]

I have added a new rad to my system and it’s in a tight spot. One of the valves is leaking basically the bit you screw into the rad i think it’s too far in and cracked. I can’t really take it off as it was a nightmare and it’s risks messing other stuff up.
The system is microbore. I’ve tried some leak paste around the value it doesn’t work. The leak is very minor a drop say every hour. I could leave it. However, I saw leak sealer you can put into systems with good reviews. My worry is with it being microbore and old it may block one of the microbore pipes? Also does it play havoc with push to fit seals and compression fittings

 

[Mottie]

Nooooooooooo!

 

[Tuharax]

Nooooooooooo!

No don’t do it or nooooo it won’t block it I’m kind of thinking leave it the risk is too high. There no pressure drop and the drops are that small there’s no flooding risk

 

[Mottie]

Don’t do it. Fix it properly.

 

[Tuharax]

Don’t do it. Fix it properly.

Fair play I’ll leave it for now I have a feeling the threads are broken inside the rad which I guess is a new rad. Just spent a week and three complete drain downs to get this rad on and some heat in the house. It’s not coming off

 

[ianmcd]

you just didnt use enough PTFE, the threads wont be snapped

 

[Tuharax]

Probably or the tapes the wrong way round. It’s a virtical rad and to get that fitting out I would have to take off both thermostats I just can’t be arsed it’s caused me that much hassle.

 

[ianmcd]

Probably or the tapes the wrong way round. It’s a virtical rad and to get that fitting out I would have to take off both thermostats I just can’t be arsed it’s caused me that much hassle.

Why would it have two thermostats ?

 

[kidgreen61]

Surely you can take it off without draining?

We would.

 

[Tuharax]

Surely you can take it off without draining?

We would.

How? If I undo the feed water will go everywhere

 

[kidgreen61]

If you have a gravity fed system, then bung outlet & vent pipe of header tank.
If a sealed system, then close iso valves on boiler & any auto air vent

Just changed a rad at home for a bigger one, lost no more than a pint of water.