Dispensing systems for dispensing one or more materials into a fluid flow conduit, during the conveyance of fluid through the conduit are configured to connect to a fluid conduit, such as a standard pipe of a shower arm and dispense a material into the water flow in the shower arm. The system includes...http://www.google.fr/patents/US7905429?utm_source=gb-gplus-shareBrevet US7905429 - Dispensing system and method for shower arm
