Help please! I made a Mash Tun in my cooler. So far, this is my only leak I can't fix. The leak is bad enough I just can't brew. View attachment ImageUploadedByHome Brew1455927457.680499.jpgView attachment ImageUploadedByHome Brew1455927532.443550.jpg
Help! Mast Tun Cooler won't stop leaking
- Thread starter skepace
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First thing I see is that the hole is very rough and not very circular. This would cause issues with the small rubber washer that you are using. Try to find a larger OD washer. Also you don't need to crack down on the nut so hard that you deform the rubber washer, that will cause a ripple and you will have a leak.
sky4meplease
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The LHBS sells high temperature silicone tubing that you can cut length wise, flatten and use to cut your own washers. Lay your SS washer on top of the silicone as a template, trace with a sharpie and cut with an exacto knife.
I did this when building my MT because I couldn't find appropriately sized flat washers.
I did this when building my MT because I couldn't find appropriately sized flat washers.
madscientist451
Well-Known Member
That's a clever idea, thanks for posting. 
This statement isn't true. You can't brew in that cooler but with BIAB you can brew in the pot you have. Don't let little problems keep you from brewing.
Are you putting all those washers in the inside?
Please post clearly how you are trying to assemble?
I would try washers outside the cooler with just the gasket and nut on the inside, with heavy Teflon tape on the threads with the nut
Please post clearly how you are trying to assemble?
I would try washers outside the cooler with just the gasket and nut on the inside, with heavy Teflon tape on the threads with the nut
treacheroustexan
Well-Known Member
Agree with the above ^ picture of your assembly would be helpful.
ktm250
Well-Known Member
I just use food grade silicone caulk to seal up my mash tun. Works like a charm.
That's a really big jumble of parts. Not how I'd do it. However, if that threaded nipple is about the right length to get through the cooler while leaving the male threads inside the cooler, ONLY use the gasket and locknut on the inside. Any SS washers needed for shimming should go on the outside of the cooler.
How thick are the walls?
How thick are the walls?
The walks are 2 inches thick. I bought a square piece of silicon today at a local hardware to try cutting a larger OD piece.
The biggest mistake people make is putting a washer between the gasket and locknut on the inside. On the inside is goes locknut, gasket, cooler wall.
I will try it right now. Thank You Bobby.
Well I used both the cut piece of silicon, much larger then the red silicon gasket, the red gasket and the locknut. No leaks! Fingers crossed for tomorrow. Thanks guys. Thank you Bobby. I had no idea to remove the metal O ring.
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