No Crimp PEX products from Keeney feature a quick and easy installation that allows you to get the job done confidently. As the nut is tightened onto the valve, the sleeve is compressed around the pipe, internal barb, and double o-ring seals that produces a leak free connection. Other PEX connections require large specialized tools and training in order to successfully complete, No Crimp connections can be completed with simple hand tools making install identical to common compression connections for other pipe materials. These valves come with the same Keeney quarter turn ball valve technology that has become known and trusted in the industry for quality and durability. Patent Pending. Available in in 1/2" Comp Pex x 3/8" O.D. Quarter Turn No Crimp PEX Angle Valve or sStraight Valve and 1/2" Comp Pex x 3/8" O.D. Quarter Turn No Crimp PEX Straight Valve or Angle Valve styles.