On Sat, 2009-01-17 at 13:39 +0000, Trevor wrote: > The fresh water in the tank is no more, or no less, 'saturated' with air > than the water in the pipes (why should it be different - unless it was > passed through a de-aerator along the way?
The water in the tank will be roughly saturated with air at atmospheric pressure. Pump that water in the pipes downstream of the pump to a notional 2 bar(g) and it will be only 1/3 saturated. Remember Henry's law? Wassail!
