http://www.buckeyefieldsupply.com/~b...ystem-p17.html

i would get something like that, but get at least a 75 GPD system. the pressure gauge will let you know if your water pressure is too low or high, its also to let you know if youre running at optimum conditions. the bypass valve is a plus to make drinking water but you can make your own, not too hard. membrane flush will let you clean the membrane to prolong the life of it. id get the inline TDS meter to let you know when to replace the DI resin or other cartridges,