I spent several hours and mucho dinero on a chemical eductor system this winter and I am having problems making it work properly. When the local Trugreen branch that I worked at installed a new fill system several years ago, I managed to procure their old eductor bowl that had been dedicated to the Tree/Shrub fill side. I knew that relatively little Urea had been run through it and the venturi had a little corrosion on it but was in pretty good shape overall so I cleaned it up and gave it a shot. I plumbed a new 1" line coming off the backflow preventer down to the 1 1/4" inlet to the eductor and out to a 1 1/2" checkvalve on the "outgoing side." I also tested it going through my 1 1/2" hose before plumbing my trucks for with customary camlocks, checkvalves, ballvalves etc. I even ran a bag of 46-0-0 through it to time the flow and suction and came up with 30 gal/min and it sucked through 50 lb of urea in 55 secs. At these rates I predicted that I would have to have all my products and *hit together at the time of any fill but, should have time to get all my stuff in to the tank. I have tons of water volume and can fill my 500 gal tank in about 16-18 minutes. That has proven to be the case but the problem is the eductor sucks the products through the bowl so slowly that I cannot get all stuff in before I am "topped out" and I end of having to crawl up into the truck and topfill as before. I'm getting to be an old geezer and the less hopping up and down I do the better. I thought I might try elevating the eductor up 3-4' (above truck inlet-camlock) to see if the physics of gravity etc. might be a solution but haven't tried that yet. Any help/advice would be greatly appreciated.