Gurgling and air in central heating

[jim843]

Was the new E.vessel installed internally in the boiler or is it external where you can see it!.

Pretty sure it’s internal. The engineer took the cover off. There’s nothing outside the boiler as far as I know.

 

[John.g]

In the attachment is that a PRV on the filling system??.

It's also possible I suppose but very unlikely as I said above that the pump is pulling in a tiny amount of air through that leaking NRV each time it starts especially if the E.vessel is on the discharge side of the pump, the closer to the boiler the greater the chance, if the boiler is under warranty then that should be covered? its the only part that has direct communication to the atmosphere via the leak even though pressurized.

 

[jim843]

In the attachment is that a PRV on the filling system??.

It's also possible I suppose but very unlikely as I said above that the pump is pulling in a tiny amount of air through that leaking NRV each time it starts especially if the E.vessel is on the discharge side of the pump, the closer to the boiler the greater the chance, if the boiler is under warranty then that should be covered? its the only part that has direct communication to the atmosphere via the leak even though pressurized.

Maybe I’m mixing this up: the leak is on the valve that has an arrow on it.

The arrow you have drawn on the photo: do you mean a pressure release valve? I don’t know what that black thing is.

 

[jim843]

In the attachment is that a PRV on the filling system??.

It's also possible I suppose but very unlikely as I said above that the pump is pulling in a tiny amount of air through that leaking NRV each time it starts especially if the E.vessel is on the discharge side of the pump, the closer to the boiler the greater the chance, if the boiler is under warranty then that should be covered? its the only part that has direct communication to the atmosphere via the leak even though pressurized.

This is where the leak is (see attached).

Do you think it’s worth replacing that NRV?

 

[John.g]

Yes, I would replace it as every other possibility seems to have been reasonably exhausted. Maybe its under warranty?.

The valve thats leaking is a non return valve (NRV). the PRV I'm referring to is a pressure reducing valve called a PRV (as is the safety valve also called a PRV, a bit confusing) the pressure reducing valve above is/should be connected dirrectly to the filling hose?.

Forget my reference to that PRV, thats the isolating valve for the filling hose.

 

[John.g]

As a temporary measure you could attach another filling hose which has isolating valves at both ends, connect one end to the NRV and shut it.

 

[jim843]

Yes, I would replace it as every other possibility seems to have been reasonably exhausted. Maybe its under warranty?.

The valve thats leaking is a non return valve (NRV). the PRV I'm referring to is a pressure reducing valve called a PRV (as is the safety valve also called a PRV, a bit confusing) the pressure reducing valve above is/should be connected dirrectly to the filling hose?.

Forget my reference to that PRV, thats the isolating valve for the filling hose.

I seem to remember from a couple years back a Baxi engineer saying that this filling loop is old and should have been replaced when the boiler was replaced. Maybe I’m misremembering, though.

You’d think the boiler would be under warranty but the installer has moved and I’ve no idea where they live now. Considering the mess they made - leaking joints under the boiler, not fitting the soak away - I should probably get someone else in.

 

[jim843]

As a temporary measure you could attach another filling hose which has isolating valves at both ends, connect one end to the NRV and shut it.

Ok, I’ll have a look and see what screwfix have tomorrow.

 

[jim843]

As a temporary measure you could attach another filling hose which has isolating valves at both ends, connect one end to the NRV and shut it.

Something like R24 Filling Loop - https://www.NoLinkingToThis/p/r24-filling-loop/83905 with some pipe and compression fittings to connect to that new loop?

 

[jim843]

As a temporary measure you could attach another filling hose which has isolating valves at both ends, connect one end to the NRV and shut it.

Another thought: the isolation valve with the handle before the filling loop would stop the leak, if any, right?

Or are you thinking that the leaking NRV is somehow pulling air into the system even though the filling loop isolation valve is closed?