Recent content by Red Dog

My apologies - I performed a typo in the opening line of my post. My pump is an air displacement type, not air lift. The operational principle is different to air lift.

Can anyone help me with a formula to calculate the output of an airlift pump for a certain head, pipe diameter and pipe length? An air lift pump works on the principle of a fill/empty cycle (so many seconds to fill and so many to empty). I can calculate the pressure required for a particular...

I have been trying to work out a formula to calculate how long it might take to fill a container of a known capacity in various depths of fresh water. The container would have a foot valve for entry and a pipe extending above the surface for air displacement. Tests at 1metre deep have given...