What's the best brand and model Air Admittance Valve for 4" stack?

[Bobberdiddly]

Any tips? Best one to go for? Plumbase do McAlpine 3-4" Air Admittance Valve but is that the best one to buy?

 

[Masood]

McAlpine is a quality brand. You won't have any issues with it if correctly installed in an appropriate location.

 

[joni os]

McAlpine pan connectors with one piece moulded collar also seem to perform better than alternative brands whose clip on ring can be a source of leakage.

 

[AWheating]

mc alpine are good,most brands work well, just make sure its fitted well and to manufacturers instructions, upright, above water spill line,insulated,removable and vented etc.....

 

[MarkAqua]

Terrain