RitePro's "Check Rite In-Tank Check Valves" are made of high quality steel, plated to military specifications and dichromate dipped for the pleasing gold appearance. The valve poppets are made of tough Teflon for a lengthy lifespan and the springs are stainless steel.
Female NPT Inlet: 3/8"
Male NPT Outlet: 1/2"
All valves have 1/8" NPT Unloader Port.