Review on Brass Control Device - Female Threaded Brass Check Valve by John Roberts

Features a 12v dual compressor system Compressors are supplied with their own one way valve. The compressors are connected with the letter "Y" immediately after the check valves. Over time, my air tank lost more and more pressure overnight. I am very happy with my purchase. These valves seal very well. I don't lose air overnight. Compressors sound a lot healthier when running. I'm concerned about durability so I bought a spare. The coating of the seal meets the expectations of this type of product. I removed the excess sealant a little so as not to tear the threads. This is really the only issue that I think could be improved, but it's extremely difficult when the machine gets the job done. I would recommend not using thread sealant and letting the end user seal the fitting properly.