A manifold is a pipe fitting with several lateral outlets for connecting one pipe with others such as a wide and/or bigger pipe, or channel, into which smaller pipes or channels lead. A pipe fitting or similar device that connects multiple inputs or outputs. Features. Manifold End Cap. Made with high quality materialSpecifications. Length 0.3 in / 0.76 cm. Width 0.3 in / 0.76 cm. Height 0.25 in / 0.64 cm