Just built this 48qt Rubbermaid Cooler MLT using CPVC and CPVC Cement. Had the cooler laying around already and spent ~$20 on the rest of the supplies. Can't wait to try it out, I have some grain on order. This will be my first attempt at all grain and I'm excited. This stuff was all built with the help of HBT ideas.
Built using 1/2" CPVC, I haven't put the slits on the bottom yet, but will do that tomorrow using a dremel and cut-off wheel. The manifold is pretty solid in there, shouldn't move around much if at all. I didn't cement the manifold connections together so I can disassemble for easy cleaning.
I used CPVC cement to seal up the hole on the cooler. A 1/2" cpvc coupler fit perfectly inside the factory hole and a bit of cement secured and sealed it right up. I'm going to put some epoxy from the valve to the cooler just to strengthen it up a bit.
I will be modifying this tomorrow for use as a Grain Mill. It's a pasta roller I picked up for $14 from Michael's (found a 40% off coupon online). It turns perfectly with my cordless drill with a 3/8" paddle type drill bit. Just need to gouge up the rollers and fab up a hopper. I think it'll work well.
Fermenting: Centennial Blonde On Deck: Haven't decided Kegged: IIPA, Mac & Jacks Clone, American Barleywine Fermentation Chamber Project
Use a ~1/4" drill bit and put it onto the rollers until they're all torn up, took me about about 10 minutes. If you hold it at the right angle the rollers will spin around. You should end up with a sizable pile of metal shavings. See this thread for more info.