Watts WPPM-12-M4AB Poly Alloy PEX 4-Port Closed End Manifold with 3/4-Inch Inlet x 1/2-Inch Side Ports Low-Lead 4/One Side - 1/2-Inch Water PEX Poly Manifold Poly-Alloy CrimpRing Manifolds are used to create multiple connections for circuit and branch applications using a single fitting with WaterPEX pipe They can be used for master water distribution or as a branch distribution fitting for a remote fixture group Manufactured in accordance with American Society for Testing and Materials (ASTM) F-877 and F-2159 Listed by the National Sanitation Foundation to NSF Standards 14 and 61 for use in potable water systems