Vaillant eco tec 615 system boiler losing pressure

[Agile]

The Vaillant 615 has been a pretty reliable boiler and any leak is most likely to be on the system rather than inside the boiler.

It should be quite repairable up to at least 15 years.

 

[dilalio]

The heating engineer found on a recent service a valve that was leaking

What valve?

 

[Tally101]

HI
So ive had it on test for 3 days and the pressure in the boiler hasn't gone down. I reconnected the pipework and it went down 0.2 bar immediately
so it looks like the pressure loss is in the pipework. Its all micropore and there's no leakage showing on the rads.
Would adding leak sealer CT1 sort out the pressure loss ?
thanks n

 

[Tally101]

What valve?

bypass valve was replaced

 

[Agile]

Leak sealer might stop the leak but I think that many installers do not trust it not to block something internal.

 

[dilalio]

Would adding leak sealer CT1 sort out the pressure loss ?

Heard some good things about miracle seal but... If I were to use it for a customer, I would caveat my doing so as being on their head not mine.