SharkBite, pex manifold 12 port poly ball valve Compatible with PEX or PE-RT pipe. Made from high performance Acudel Polymer. Connects to PEX pipe with Copper Crimp Rings or Stainless Steel Clamp Rings. Minimum working temperature 33 degrees F at 160 psi. Maximum working temperature 200 degrees F at 80 psi. Certified for use in potable water and hydronic heating system applications.