Valve did not work. Had to throw it out.

This product worked very well. Used it for diy and fixed what was estimated as a $1800+ a coil replacement. My system has been ice cold ever since.

It worked! Both A/C units working all summer long after we were told replacement was inevitable. It was easy to install. Called the A/C guys in to charge my units that had already leaked out from last fall. Installed in less than ten minutes after they pulled out of my driveway! Saved myself over $25K+ in replacement costs on two 4 ton units and an exchanger 3 stories up. Let alone the price of freon which is now astronomical. Costed me $700 last year to get my units recharged and no more iced up exchngers! Thank goodness! Still operating a 30+ year old Rheem unit and a 15+ year old Carrier. Only problem is now I'll keep these old less efficient units operating longer instead of upgrading to something quieter and more efficient. I guess now I can do it when I choose to do it. When I do install new ones I can add this as insurance to protect against any future leaks! Protect against spending $ on recharges and waiting in the heat for a repairman down the road! I am very happy with the results!

IF you loose some freon over a years time, this will do it. GREAT product! You loose 3 pounds in 5-6 month, get it fixed.

Super easy to apply, just watched a few videos, read the instructions and followed through. Remember this is designed for a properly charged A/C so make sure you have the right amount of refrigerant before using it. I'll probably circle back to this review next summer, but for now the A/C still blows cold and it did no harm to it as others say it might do.