Cone on suction side here. Also suck out of totes and shuttles with ports on suction side using scales under those containers. Way more accurate than measuring volume.

On picture below, water is flowing left to right. Out of frame is a valve between water supply and meter. This always gets closed when pump isn't running to prevent water supply contamination. You could use a check valve too, but there is a flow penalty. Meter is on suction side of pump as cavitation and especially soapy chemicals (glyphosate) and surfactants play havoc with accuracy. From there I have cone and if you look carefully a couple of cam-lock ports for shuttles. Put a valve right at the camlock so that the contents of the hose don't contaminate your system after shutdown. Pump is out of frame to right, but cone rinse and jug rinse is supplied by water from vent/prime port of pump.

This system is not idiot proof. Operator has to remember to close the valve on suction side to protect the water supply. Operator has to make sure all chemicals are in system with 100 gallons yet to pump in order for hose reel to be flushed. Operator has to make sure all chemicals are in system and pump largely back to pure water to rinse jugs and cone. I also have a valve on the output side of the pump within easy reach to partially close to 'throttle' the pump output if the sprayer is loading faster than I can dump and rinse things in the cone.

It works for us. For those that worry about pump wear, a replacement Chonda pump is about the same money as the venturi plumbing system. If you're going to be on the pressure side, you will have to pump or gravity into the cone. Electric pumps are expensive and require power.

This is inexpensive, reliable, quick, but not idiot proof.

Edited for spelling and clarification.

Ken

(Induction Cone.jpg)

Induction Cone.jpg (101KB - 275 downloads)