How much water does it use to cause the suction if that makes sense?
We leave enough water in the IBC tank that is just over the tap so roughly 50-80 litres. Once this fires through, the water you're drawing is going into the same tank and clearly rising but if you're pumping from one tank to fill another tank you will drain the first as you need to pump to receive.
So if you wanted to transfer a chemical from one tank to another it would dilute with the water you're pumping unless you start off with chemical and pump the chem to draw the chem.
Very simple but f**k me an quality tool.
This canal job we're on we have the trailer being pushed down the paving drawing when needed, no need to tow away to fill from FH.
I'm thinking of saving rain water from gutter downspout then pumping into van.