Can you run an RO system off an 1100 GPH pump?!, that equals an 18GPM pump, Jesus Christ!, a garden hose at full blast is about 4GPM. How much water do you need each minute?!...sorry. Unless this pump you speak of is really heavy, (like, uncomfortable to lift heavy), you are miss interpreting the the information you are giving. How big is your RO/DI system?, does it have a reservoir? if so, how big? (if no reservoir then, NO, without a reservoir I can only assume the system is very small and that much pressure would damage your filters), do you have kidney problems? is that why you have a deionized water system readily available? , How are you connecting it to your water supply? is this for a hydroponic of soil garden? how big is this garden? should I continue?... Sorry, I have so many follow up questions.... Honestly, I wish I had an RO/DI system.. lucky bastard. where did you get it?