Waterway 672-4040 4-Port ManifoldThe Waterway 672 4040 is a 4 port transition pool and spa manifold. It is constructed from white PVC and features a 1 inch slip socket connection alongside four 3 8 inch smooth barb ports and includes two plugs. This manifold is designed for use in pool and spa plumbing systems, providing compatibility with standard 3 8 inch tubing that can be glued or clamped onto the barbs.