Review on Efficiently Assess Cooling Systems with the Stant Metallic Cooling System Tester by Chris Graves

I bought my first tester in 1977 but unfortunately lost it last year. so i bought another one. Things have certainly changed. This one isn't that difficult, but just as enjoyable in every other way. I used it for the first time today and that little drop I couldn't find came out right away. The price is right and I'm sure this will last as long as I can turn a wrench. I didn't realize there were so many different cap and adapter designs - not that I'll likely ever need one of these, but it's nice to know they're available should I need them.