Review on Compressor Pressure Unloader LF10 4H 1 NPT1 4 95 125 by Maurice Hurd

Edit 10/31/18. The original rating is below. After purchase and installation, the relief valve was leaking like crazy. I turned around and bought a Square D thinking my problem was solved. After installing the square D block, the discharger licked it! It turned out that the installation of the first switch occurred simultaneously with the failure of the check valve, which led to a constant leak in the unloader. This product is still inferior to the Square D, but it worked (electrically) as intended for the few minutes I actually used it. I'm changing my rating to two stars simply because it's still a cheap and flimsy switch compared to what you can get for a few bucks more. Bought to replace a switch on my 11 gallon 3.5 hp Campbell Hausfeld supercharger. After installation, the pressure line relay is constantly leaking. Received 10/25/18, installed 10/27/18. After finding this faulty part I went to the returns area where I was told this item was not available for return 2 days after receipt, 4 days after ordering. Save your time and don't buy that defective product which you are not allowed to return if it doesn't work right away.