1/2", evo ball valve, compatible with pex pipe only, no crimp, clamp, pex rings or special tools required, green visual indicator shows pex pipe is inserted to the proper depth, approved for underground & behind the wall applications with no access panels, faster installation, reduces the risk of installation errors, shut off water flow for servicing & making repairs, securely & permanently connect different sized pex pipe together, can be rotated after connected, ideal for working in tight spaces.