Leaking filling loop

[smiley2204]

All,

I appreciate any wisdom people can give on this, as i don't want to turn a simple job into a significant job!

The filling loop has started to leak at the point the braid meets the dog ears (as indicated in the pictures attached). With the valves at either end shut, it still drips and fills a 5L bucket over a 10 hour period. I believe this indicates that one of the valves has failed and i need to replace the entire filling loop and valves (with something like this: https://www.screwfix.com/p/essentials-r24-filling-loop-with-non-return-valve/83905), rather than just unscrewing the dog ears and replacing the braided loop?

Can anyone advise?

And if i have to replace the loop and valves, I am assuming i have to drain down the entire heating system (but not the unvented hot water cylinder) and replace the inhibitor when i refill the system?

Thanks in advance

 

[CountryFan]

Is it the valve where the screwdriver is pointing that’s leaking? If yes, no need to drain anything as it’s on the cold main. If it’s the other valve, then no need to drain full heating system, only relieve the pressure in it’s vicinity usually.

 

[Justin Passing]

Excuse me while I adjust my teeth so they make the right noise when I suck air in through them.

"New boiler, mate".

OK you were right. From what the guage says, your top valve is OK - it's holding the boiler pressure but not allowing the mains to increase the pressure, tick.
But from what the bucket says, the lower one, on the mians, is indeed "letting by".


You'll need to turn the mains off but that's all. The loop you found has the bits you need. Just change the mains/double check (non return) valve and the hose. Theoretically the hose shouldn't be left connected.

 

[smiley2204]

You guys are legends!