Cooler mash tun kinda bubbled a little after mash.

[Justdrumin]

so I did my first all grain which went off perfectly. Hit my mash temps perfect. Preheated my tun with hot water for a few hours, doughed in at 170*F and hit 154*F. Sparge with 175*F water. Hit my volumes and gravity on the dot, but as I cleaned out my mash tun I noticed that the walls of the cooler kinda warped or bubbled a bit. Anybody had this issue? It's an Igloo 50 quart Island Breeze Maxcold.

 

[ulnpiper]

Yeah, I have a 10 Gal igloo orange cooler and it has a slight buckle in one wall. Doesn't affect anything as far as I can tell.

 

[johngaltsmotor]

Mine has the same personality. Putting in the super hot water distorts the plastic. No major impact other than making it a bit tougher to get my false bottom to seal to the walls cleanly. It will reach a maximum after a few batches and then won't move anymore. It is likely just the relaxation of the stresses left in the plastic from forming at the factory once you soften it enough.

 

[Justdrumin]

Ok good!! After having a FANTASTIC experience with my first all grain I was gonna be pissed if it was ruined by my mash tun. It sure is tasty though! Notty handled business in three days! Lol. Thanks guys.