Tried my new RO system out today. Had to laugh. Set it all up. Had water running through. Had the waste tap open & nothing would come out apart from waste water. When I shut it the waste water tap off pure water started trickling out & when I say trickle it did half a litre in half hour. I would have been there till next week. Am I doing somet wrong. Does the waste tap need to be open all the time. If so nothing comes out. Shoul it be closed? Surely after half hour it should of been conning out a bit faster as it was pouring out the waste pipe. It's a 4 stage 50gpd RO system. And please no one tell me I should have got bigger as only use about 200 litres a month. I went back to my Twin DI's in the end. Also the water coming out was only 008ppm. Any ideas chaps.