No I didn't remove the washer. I just tried a smaller than recommended thermometer and it didn't leak. The only thing the plastic cup doesn't test is how the heat effects it. I guess I could pour boiling water in the cup and see if anything changes.
Has anyone ever used this particular piece?
http://www.homebrewing.org/Weld-less-Thermometer-Accessory_p_4301.html#
I bought this thinking it would be an easy way to use a digital thermometer with my brewpot/hlt. The issue is finding a thermometer that will fit the 3/16" hole, I have also...