I did the beta testing for that company in the early 90's. Their first unit was a off the shelf plastic pump sprayer with the same cap. It exploded like a bomb one night when the city water pressure went too high. When they eventually went to the tank like you see now we started selling them I had 30 or so in the ground when they began clogging up. They refused to stand behind the product so we ended up pulling most of them and refunding the clients. A few years later I taught a class on Injectors at a local hort. conference and trade show, they sent a rep and his check for the class bounced. I don't have much respect for the company.