A manifold having a tubular body including effluent retention areas formed within the body and conduit portions having opposing ribs extending radially from an outside surface for use with a pipe anchoring mechanism when installing the manifold and connected flexible corrugated pipe within a septic tank drain field. The manifold includes longitudinally opposing input and output ports for connection to a cooperating manifold or pipe. Multiple transverse ports provide connection from the manifold to an effluent source such as a septic tank or drain field distribution pipe.