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-   -   Post pics of your full-drain mash tun! (http://www.homebrewtalk.com/f36/post-pics-your-full-drain-mash-tun-334118/)

StMarcos 06-08-2012 09:29 PM

Post pics of your full-drain mash tun!
I'm looking to build a tun out of a cone-bottom (15deg) tank. Drain on the bottom, perforated plate false bottom. I'm looking for ideas from others who have done similar construction.

I will likely insulate somehow, possibly by nesting the tank in a larger one and filling the gap with polycyanurate foam.

Please post some pics so I (we!) get ideas and inspiration. Please no pics of converted coolers with the drain on the side, or similar sankes. I don't want to worry about keepin a siphon while draining the last bit - hence the drain on the bottom.

Similar to


but I'd look for one without the stand, and I'd prob install my own bulkhead.

storrown 06-11-2012 02:06 AM

As I'm kind of new around here, please take what I say with a grain of salt.

Instead of using the expensive tank as you stated, why couldn't you just use a sanke keggle with the drain in the center of the bottom. The only reason why I ask is that's what I am planning on doing in the near future. The bottom of a sanke is curved, so if you cut a hole in the middle of the bottom and weld in a male 1/2 NPT coupler so that it is flush with the inside, it will be a fully draining mash tun for far cheaper.


StMarcos 06-11-2012 09:34 AM

You could, and that's what i mean. I'm asking about tuns that will fully drain, no siphon needed. No dead space. With side-port tuns, once the liquid level inside is below the bulkhead, you need a siphon to continue the flow.

In addition to the full-drain setup, I'm interested in fully custom tuns as well, stepping away from the conventional sankes and converted coolers. Those that have done their own insulation schemes, nested containers etc. What have yih got? !!!

storrown, I'm glad I got one reply at least!


texasbrewer73 06-11-2012 10:34 AM

I personally wouldn't want a mash tun that couldn't be completely insulated or direct fired. I don't care to babysit the mash unless I'm doing a decoction mash.

StMarcos 06-11-2012 07:03 PM

Me neither. What's yer point?

phoenixs4r 06-11-2012 07:51 PM


Originally Posted by StMarcos
Me neither. What's yer point?

Insulating the cone section might prove tricky. Not really, but I see where he's going with it.

coogee 06-12-2012 09:48 AM

You can just flip a Sanke upside down, cut out the 'top' (was the bottom.)
Instant bottom draining fitting, add plumbing to suit. Also makes for a possible bigger dump valve option to help clean-in-place.

I prefer the idea of a bottom draining tun but mine is already side draining.
I've never had a problem maintaining a siphon, just make sure there's no air leaks and science does the rest.

StMarcos 06-12-2012 06:06 PM

For the 'cone' I was thinking that 15 degrees would be not too tough. If the vessel was nested and the gap filled with insulation, wouldn't be hard either.

Siphon won't start if the fluid level in the tun is below the bulkhead. This happens to me when the flow out the drain is faster than it can flow through the grain. I just wanted something that will drain the last bit without fuss. My current side port cooler tun, 120qt, doesn't do this. It will gurgle and pull air when there is plenty of wort left in the tun. I have a braid that covers a copper tube that is bent to reach the bottom.

Need a bigger tun than a sanke, so that's why I was looking away from this option. Would like to see pics though.

StMarcos 09-04-2012 02:42 AM

What do you guys think about using a commercial sink as a mt? Reason being that the bottom slopes gently to the middle. I wonder if I could find a polyethylene one.

helibrewer 09-04-2012 05:04 AM


Originally Posted by StMarcos (Post 4384516)
What do you guys think about using a commercial sink as a mt? Reason being that the bottom slopes gently to the middle. I wonder if I could find a polyethylene one.

Check out the latest BYO mag, there is a guy in there that built a conical unit that mashes,boils, then ferments, then transfers to his attached kegerator...it's a mobile unit on wheels...pretty incredible setup...he's a mechanical engineer which I guess doesn't hurt when it comes to DIY.

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