Dispensing system and method for shower arm

A dispenser system for connection to a fluid flow pipe through which a fluid may flow, the dispenser system comprising:

• a first tube member having at least one fluid flow passage therethrough, the first tube member having an inlet configured for connecting to and receiving a fluid flow from a fluid flow pipe and conveying fluid through the at least one fluid flow passage in a fluid-flow direction, the at least one fluid flow passage including a restrictor passage having a first portion and a second portion downstream of the first portion in the fluid-flow direction, the first portion having a first fluid pressure and the second portion having a second fluid pressure that is less than the first fluid pressure, upon fluid being conveyed through the restrictor passage;
• a flask having a flask body with an interior volume and a flask cover removeably connectable to the flask body, the flask cover having a shaped connection portion;
• a pressure-deformable container held within the interior volume of the flask body, the pressure-deformable container having an interior first volume for holding a flowable material, the flask and the deformable container defining a second volume within the flask but external to the deformable container, the pressure-deformable container further having a shaped connection portion for mating with the shaped connection portion of the flask cover;
• a connection structure for connecting the first volume in fluid-pressure communication with the second portion of the restrictor passage and for connecting the second volume in fluid-pressure communication with the first portion of the restrictor passage;
• wherein the shaped connection portion of the flask cover and the shaped connection portion of the pressure-deformable container have at least one of a mating groove and protrusion, mating non-circular cross-sectional shapes, or a combination of a mating groove and protrusion and mating non-circular cross-sectional shapes.

A dispenser system for connection to a fluid flow pipe through which a fluid may flow, the dispenser system comprising:

• a first tube member having at least one fluid flow passage therethrough, the first tube member having an inlet configured for connecting to and receiving a fluid flow from a fluid flow pipe and conveying fluid through the at least one fluid flow passage in a fluid-flow direction, the at least one fluid flow passage including a restrictor passage having a first portion and a second portion downstream of the first portion in the fluid-flow direction, the first portion having a first fluid pressure and the second portion having a second fluid pressure that is less than the first fluid pressure, upon fluid being conveyed through the restrictor passage;
• a flask having an enclosed interior volume;
• a pressure-deformable container held within the interior volume of the flask, the pressure-deformable container having an interior first volume for holding a flowable material, the flask and the deformable container defining a second volume within the flask but external to the deformable container;
• a connection structure for connecting the first volume in fluid-pressure communication with the second portion of the restrictor passage and for connecting the second volume in fluid-pressure communication with the first portion of the restrictor passage, wherein the connection structure comprises:
• an extension member having a flask connection end for selectively coupling and de-coupling the flask thereto;
• a first fluid-pressure passage in the extension member, the first fluid-pressure passage connected in fluid-pressure communication with the first portion of the restrictor passage of the first tube member;
• and
• a valve disposed within the first fluid-pressure passage, for blocking fluid-flow from the first fluid-pressure passage in the event that the flask is decoupled from the extension member.