As is my luck, I got a $250 4 stage 50 gph RO DI unit. There is an issue. Okay, several. Issue 1: NO RO DI! - The thing produced about 5 gallons of wastewater in about 5 hours, but not a drop of actual pure RO DI water... I'm pretty sure I hooked it all up right, I followed the directions to the letter... this issue is with the horizontal top canister piece thingy, which can be seen in the link to the product I got. Issue 2: WTF, It leaks? - Yep, the 4th stage, which needed assembly to attach it to the actual unit, leaks. It has a large screw-on part, and I can't get it any tighter screwed on then it is, not without a body builder to try it out... but it still leaks. When I had too much water being forced into the RO DI unit, it sprayed water all up the wall, and even when turned all the way down it had a steady drip of water coming out of the seam where the cap and the rest of the container for the 4th stage meet. Unit is a Corallife 4 Stage 50gph unit. Found here: http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4395+12093&pcatid=12093 So, anyone here know what I did wrong?