The Apollo manifold system will save you time and money by allowing you to make longer, continuous runs of PEX pipe with fewer connections. Each manifold is bolted to a galvanized back plate for easy mounting to any structure. The cover plate is constructed of 1/4 in. ABS plastic, and includes red and blue labels indicating the destination fixture. Each manifold consists of two inlet ports that Supply the dual chambers. Typically, one inlet is used for hot water Supply, and the other inlet is used for cold water Supply. However, both inlets may be used for either hot or cold water. The inlets are not temperature specific.