I have to keep almost empty a small tank. The tank volume is 1 lit. A
mixture of water with bubbles of air, burst in the tank, in a flow rate
15 lit/min. What kind of pump I must use?
Install a separator and you won't need either the tank or a pump. For this sort of size of flow, a central heating air separator will probably do the job. Screwfix catalogue?
__________________
Innuendo is not Italian for a suppository.