Review on Efficient A/C Flush Gun: TSI Supercool 27361 with Flow Control Valve and Enhanced Spray Head by Jimmie Trotto

I don't know why others have liked this product, I'm sure it works but mine came WITHOUT the 'upgraded' head and the "Head" rubber on WAY too hard. ALSO the compressed air fitting is not a regular quick connect like a 1/4 "industrial" fitting but looks like an auto 3/8" fitting or something. I couldn't find a match so I spent a day looking for solutions I ended up removing the small valve on the cap which has a 1/8 NPT thread in the cap. To solve this I used a 1/8M-1/4MNPT adapter and a 1/4" male separation used. .Because of the stiffness I bought a set of o-rings to replace the AC o-rings on the hoses which I remove for this cleaning. So I found a small silicone o-ring that fitted the small airgun barrel, and slid it down to the black rubber. DAS makes a good soft seal at the end of the AC hose. Maybe I got a bad one, it's made in China after all