Rubbermaid/Igloo HLT Modification

[Snafu]

Yes I did a search for this first! I didn't really see anything I needed. So, here goes.... I want to add a sight glass and Thermometer to my round cooler setup. Anyone have a link that explains the 'how to' on this? Something with pics would really help. I currently have a 1/2" valve that tends to leak if its not in just right so I have concerns trying to add these two other things...

 

[gromitdj]

Check out The Pol's sight on Thermometers & Sight Guages. It's a very informative sight all-around.

 

[The Pol]

Beat me to it... yup, check em out

I also have a ball valve design that is leak free.
https://www.homebrewtalk.com/f51/15-ball-valve-bulkhead-lowes-22595/