Though most of the time you think of clearing water lines in a RV or garden hoses for the Winter, this valve is a life saver when your AC lines get clogged with silt and the normal muck that comes out of Air Conditioners in your house. Most AC Repair companies will charge $100 just to clear out drain lines when they get plugged. I found out by putting this on a 3/4 PVC fitting and putting it into the vertical PVC pipe near your AC unit inside the house (don't forget to CLOSE the valves coming FROM the unit or you will blow the junk BACK INTO your AC!), and using a small compressor, not putting much more than 10PSI pressure through it, this will do the trick! There are very small compressors frequently sold with portable battery jumping units that are perfect for this job. The value is solid brass and will last a lifetime.
Rating: [5 of 5 Stars!]