Hey Roasty, life's too short to wait for the RO to cook. Sounds like you need RO storage capabilities. My RO system came with a 4-gallon storage tank. I immediately added a 2nd tank -- 'cause I also run lines to my refrigerator's ice maker and my kitchen sink. But, then, still not wanting to get in a bind, I created a cheap auxiliary res from a 5 gallon plastic pail with a spigot on the bottom and a float valve on the top. I branched off an RO output line to the float valve so that the 5 gallon pail will always automatically fill itself. Now, when I go into my brew lab, I have 8 gallons at the ready from the RO system tanks and an additional 5 gallon reserve. The plastic pail system is cheap to build, and no reason that you couldn't daisy chain a few together, or just start with an even bigger pot.