AIR in secondary loop

[wildcard]

Keeps spluttering at taps,was thinking of fitting an aav.Also one of the showers bangs randomly possibly air again.Is there a prob with fitting a aav to the loop?
Cheers

 

[gasmanrob]

Question is how's that air getting in there and could that problem be solved

 

[townfanjon]

No dont use AAV, is this a new install or a repair on an old one , in other words has it ever worked correctly ?

 

[ShaunCorbs]

+1 to sort the problem dont mask it

 

[Chalked]

Unvented or conventional cylinder?

 

[wildcard]

Unvented the system is 12 plus years old he got a lot of problems when the bronze pump was changed.

 

[ShaunCorbs]

Unvented the system is 12 plus years old he got a lot of problems when the bronze pump was changed.

fitted the right way round?

 

[macackau]

Did you bleed the pump? To be fair though mains pressure water or balanced from an unvented cylinder should clear of air within a minute.

 

[wildcard]

fitted the right way round?

I'll check that tomorrow thanks

 

[wildcard]

Theoretically opening taps should clear the air

 

[townfanjon]

Yep , right way round as shaun says , is there a nrv fitted if so is it the right way round ? is it working ?

 

[townfanjon]

Lol some quick typing going on here

 

[macackau]

Does the cylinder have an internal or external expansion vessel that needs re-charging? Trying to think of the simple basic stuff.

 

[wildcard]

There's a nrv that rattles like a gooden & and an internal bubble not mega flow but no dripping from the tpr valve

 

[Chalked]

Check the non return.
I gave seen double check valves used to prevent back flow! The secondary pump can't clear the air, as it can't open the non return. Thus also burns pumps out quickly.
Needs a very lightly sprung non return.

 

[macackau]

NRV then I'm guessing. Might be an idea to re-charge gap anyway.

 

[wildcard]

Ok thanks all