Review on Horiznext NPT 1 Stainless Steel Cast Elbow Adapter: Perfect Mechanical Coupling For Metal Tubing by Shawn Hill

Purchased three of these and all three had the same problem, the threads for the female side weren't cut all the way in and whenever a male was screwed in it wouldn't seal because the male couldn't thread in all the way without jamming, galling and no amount of proper stainless steel thread tape could make it seal. I wound up using a heavy application of liquid steel epoxy on the threads to get it to not leak. Let dry overnight otherwise the liquid pressure will blow out the epoxy. Do not purchase this part.