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-   -   Rubbermaid Cooler Thermometer (http://www.homebrewtalk.com/f51/rubbermaid-cooler-thermometer-171517/)

Arkador 04-03-2010 12:16 AM

Rubbermaid Cooler Thermometer
I want to add a Bilchman Brewmometer to my 10 gallon Gatorade (Rubbermaid) cooler.

I got the cooler used, so there is already a hole which appears to be about 1/2 inch in the center front of the cooler. I am concerened that the weldless brewmometer does not have enough threads to span the thickness of the cooler. Do I need to add a bulkhead to the cooler to add either the 1/2inch NPT or weldless version of the Bilchman Brewmometer?

Weldless Brewmometer

1/2 Inch NPT Brewmometer


I have read THIS thread, but want something a little more professional

Just read http://www.homebrewtalk.com/f11/remo...roofing-26905/

And will concider this method, after seeing some of the issues with the probe thermometers in the wall of a cooler..... What is the best way to close the hole in the side of the cooler?

Arkador 04-04-2010 04:34 PM

wow, no replies.....

Well, decided to do http://www.homebrewtalk.com/f11/remo...roofing-26905/

and filled the hole in with silicone caulk, since it will take the heat, and is food safe.

willynilly 04-04-2010 04:44 PM

The bulkhead looks like the most viable option. Using the bulkhead and threading the thermometer into it, youd have a sturdy and leak proof solution.

Dunno how well a silicone caulk is going to plug the hole.... Id have used a stopper.

Funkenjaeger 04-04-2010 05:00 PM


Originally Posted by willynilly (Post 1985959)
Dunno how well a silicone caulk is going to plug the hole....

Yeah, that's the problem. Nothing really adheres well to the plastic that these coolers are made from. Silicone won't do you much good as soon as it loses its adhesion to the wall, which doesn't take much.

I've used silicone with good results when smeared on a bulkhead fitting as an added level of waterproofing, but the one time I tried to seal a probe in a small hole in the cooler wall, it was leaking after just a couple uses.

If you wanted to install one of those weldless thermometers, you can enlarge the hole in the OUTER shell of the cooler so that you are sealing the thermometer directly against the INSIDE shell of the cooler. I did this on both my coolers when installing sight glass + thermometer probe.

willynilly 04-04-2010 05:11 PM

Caulk shrinks, this will likely leak very easily.
+1 to enlarging the outer hole and sealing against the inner wall.

DevilsCreekBrewing 04-04-2010 06:18 PM

For a pre-chiller I made, I put a copper union through the wall. I used marine silicone on the inside, and PL Premium on the outside of the cooler. PL Premium has 4 tons of bonding force, that thing is NOT moving. The cooler will break before the bond does.

Funkenjaeger 04-04-2010 06:42 PM


Originally Posted by DevilsCreekBrewing (Post 1986053)
PL Premium has 4 tons of bonding force

That doesn't mean a thing if it doesn't actually bond to the surface. I made the mistake of using some 2-ton epoxy on similar plastic once, and it fell apart by itself the next day. You may get just enough adhesion to get the job done, but it typically takes some pretty advanced adhesives to actually make a solid bond.

lanvp 04-04-2010 06:42 PM

If you need to do a "through the wall" set up, here is an option.


In my case, I use a 5gal cooler. This allowed me to install a long thermowell through the lid for my thermocouple probe!

One advantage, you can reset the depth of the probe for reading throughout the grain bed. You will be surprise on the results. The temperature differential in my MLT between the top and the bottom of the grain bed was significant...


I got the thermowell from Brewers Hardware


Hope this helps.

Cheers! :tank:

willynilly 04-04-2010 06:44 PM

He got a cooler with a hole already in the side...

lanvp 04-04-2010 06:49 PM


Originally Posted by willynilly (Post 1986082)
He got a cooler with a hole already in the side...

Yes. The MoreBeer fitting needs a 1" hole. He just need to make the 1/2" hole on the cooler a little bigger :)!

Or plug it... Just kidding!


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