Originally Posted by Chipman
What size mashtun are you looking for? You can easily buy a premade 10 gallon cooler mash/lauter tun for $120 plus shipping. MidwestSupplies sells one i know for sure. Probably a lot of other sites do too.
Or make your own... $40-50 for a 10 gal round cooler or cheaper for a rectangular, $20 for hardware, and a homemade copper manifold or buy a false bottom.
I can't think of a reason to have a separate mash and lauter tun, in fact it makes it much easier to do both in one vessel - no transfer of grain. Any links to the ones you're looking at would help though - maybe there's a benefit?