Review on 4-Way Air Manifold Splitter & Coupler Set - 1/4'' NPT Plug For Industrial Pneumatic Compressors by Jarrod Zuvers

I bought this with the intention of removing the input connection and hardlining my air compressor in one side and have another line run out the opposite end. Well upon trying this both factory installed plugs stripped. I managed to get one out by hammering a bigger allen socket into it and putting an impact on it but that other was so tight it just kept stripping out, at this point i decided to drill out the plug and try to use a screw extractor on it. All that happened is the junction plug deformed around my vise and is now no longer usable at all. Not impressed. It would probably work just fine if you want to use it the way it comes but if you want to remove those plugs good luck.