Irrigation emitter unit

An emitter unit adapted to be integrally bonded to an internal surface of a conduit, comprising an elongated housing;

• a housing inlet adapted to communicate with an interior of said conduit;
• a housing outlet adapted to communicate with a conduit outlet;
• an elongated, flow-restricting flowpath formed in said housing;
• a flowpath inlet communicating with said housing inlet;
• a flowpath outlet communicating with said housing outlet;
• a resiliently flexible membrane mounted in said housing;
• said housing being of closed box-like shape and constituted by an assembly of a receiving member and a cover member;
• said receiving and cover members being elongated in the direction of their longitudinal axes extending along the length of the conduit, and having projection and recess interengaging means formed in rim portions of said members, said projection and recess means having interacting walls directed substantially transversely to the circumference of said rim portions, such that projection means of one member are adapted to form a close pressure fit within corresponding recess means of the other member.