Originally Posted by david_42
People who have copper manifolds & chillers take great pains to clean them before use. Copper oxides do not taste good.
I think you would have big trouble cleaning the holes.
I don't take any great pains to clean my chiller before use. I hose it off and put it in boiling wort. That's it. Yes, there is some oxide on the copper before use, and yes, it does come out of the wort cleaner than when it went in (meaning some of that oxide got in the beer).
However, I've never had a problem taste-wise. Copper has been a component of plumbing and brewing systems for many years, and I'm willing to accept any risk associated with its use.
I would guess that with proper support, the copper sheet should work just fine as a false bottom. Lots of people have copper in contact with stainless at multiple points in their home breweries (Keggle dip tubes, for example), with few galvanic corrosion problems. The intermittent use mitigates a lot of the galvanic corrosion issues. If those same parts were in constant use, then there would be a lot more potential for problems.
Is this a keg MLT or a cooler MLT?