mole14 Aug 2018 14:22
It's all a question of hydraulics. Zones 14 and 15 have very little gas. So when you take the top off the pop bottle, it goes flat pretty quickly.
The beast of zone 19 on the other hand has lots of gas, which acts like an expansion vessel, maintaining pressure and flow for much much longer, every time you open the tap.
This baby will give us white smoke for sure Shirley.
Lol