Have you ever tried plumbing 2 air compressors into one line prior to plumbing them into your tank? The most attractive way of doing this prior to our block was using a "Y" block and it forces your lines to come in at an angle. This doesn't allow you to run your lines parallel and it is just for function. We want more than just function so we created our block with aesthetics in mind; you can plumb both lines side-by-side. This is machined from a solid block of 6061 aluminum and comes with a 1/2" NPT to 1/2" push to connect fitting, and stainless hardware. We give you an option to order this in 1/4" or 3/8" NPT input lines.