tedbear - 2/21/2024 15:17 Your thinking agrees with mine. I always use an Inductor. As mentioned the pump "sucks" in the water and chemical from a cone tank that are both tee'd into the inlet of the pump. Each branch has a quarter turn valve so for adjustment. Once the chemical has been "sucked in", its valve is shut so that the pump does not suck air in through that path. An eductor must use a venturi to create a low pressure area within the plumbing so the chemical is sucked in after the pump. One argument against an inductor arrangement is that the chemical is going through the pump. This is true but I have not seen any damage from this in several years of use. The overwhelming quantity of water that is involved tends to flush the chemical through.

One thing about an eductor system is that if the operator should shut the hose off downstream since the tank got full and the transfer pump is still running that it can force water out the top of the cone tank. This is not real likely to happen but is a possibility.