A modular conduit system comprises elongate conduit elements (50, 51) and conduit fitting elements (30, 37) longitudinally divided and provided with tongue and groove joints configured such that identical conduit halves or identical conduit fitting halves can be snap fitted together and released interengaged...http://www.google.es/patents/US6247500?utm_source=gb-gplus-sharePatente US6247500 - Conduit systems
