Chapman ThermoBarrel Insulated Stainless Mash Tun | Product Review

A 5-gallon tun is large enough to make five-gallon batches using traditional continuous sparging. I can prepare 5.5 gallons of wort with a gravity up to 1.070 using a five-gallon mash tun.  However, seven to seven and a half gallons is the sweet spot for five-gallon batches, especially if the height to diameter ratio remains the same as a 5-gallon beverage cooler.  I started out using 10-gallon beverage coolers for 5 to 6 gallon batches, but there is too much dead space in a 10-gallon cooler.  I eventually moved to using 7-gallon beverage coolers before downsizing to 5-gallon beverage coolers.  A ten gallon beverage cooler will handle up to 25lbs of grain with a hot liquor to grist ratio of 1.25:1.  I use between 9 and 11 pounds of grain when shooting for 5.75 gallons of wort at the end of boil.  That grist range yields 5.75 gallons with an O.G. between 1.048 and 1.060.  The extra slop in a 10-gallon cooler may be beneficial to those who perform multiple-infusion lautering (a.k.a. batch sparging), but it is has no upside when using traditional sparging.

That makes sense. I use my 70 qt coolers for 5 gal batches and always do no sparge, I take a 2-3% eff hit, which I couldn’t care less about. Also makes pH adjustment less of an issue, ime.

Touche, buddy!

If I was going to buy one of these, I think I’d get the SS Brew Tech version.

http://www.ssbrewtech.com/collections/mash-tuns/products/infussion-mash-tun

At this point, sticking with continuous sparging is not about increased extraction rate.  It is about a process that has been honed over many batches of beer that just happens to yield a high extraction rate.  While I could switch to using a different process, not much would be gained time-wise by doing so.  I would also have to go through a period of re-calibration in order to establish a new set of baseline extraction rates.  My standard end of boil batch size today is around 3.66 gallons.  Running off 4.25 to 4.5 gallons of wort takes about twenty minutes, including the re-circulation step.  It takes me longer than twenty minutes to clean my kettle and stainless steel hop filter.

Maybe you have synesthesia in addition to OCD?

I don’t think it is as strong as an official diagnosis :-).  Its more like an association that I think about.  Regardless, I prefer stainless.