Switch out and upgrade old style restrictive Center-Poppet Spring or old style Swing Check Acme Threaded valves with Magic Plastics’ new Retro Replacement Smart Check® Valve Bodies. There is no longer a need to purchase the entire valve assembly and discard the Union Fittings. Magic’s Retro is sold separately as a replacement body in 1½˝ and 2˝ sizes. Most importantly, you get the same Full-Flow design as Magic Plastics’ innovative and popular Smart Check® Valves. The light ½ lb. spring allows you to install the valve in any orientation while still achieving a 100% Full-Flow opening.