Cheers guys, after some thought I think I can do without a booster pump. I've bought a 1000 ltr Ibc, I work 3 days a week Mon Wed Fri and average about 400 ltrs a day. I estimate around d 290 ltrs production a day with the 200 gpd ro so I reckon I'll just buy a transfer pump instead. Found one on toolstation for £35, 400 watts, 230 volts, 150l/min, gonna go with that.thanks for the replys.