Apparatus for controlled release of an erodible solid into a liquid

A dispenser assembly for controlled hydro-injection release of an erodible solid cartridge into a liquid comprising:

• a fluid flow member having an inlet for attaching to a pressurized fluid line and an outlet;
• a hydro chamber provided in the fluid flow member, the hydro chamber having a hydro-injector member positioned therein;
• the hydro-injector member having an inlet opening which faces the inlet of the fluid flow member and outlet opening;
• a cartridge holding member removably attached to the fluid flow member, the cartridge holding member configured to house the erodible solid cartridge in an activation chamber;
• a plate positioned in engagement with the hydro-injector member;
• a projection extending from the plate into the activation chamber, the projection having a first inlet opening and a second inlet opening;
• wherein the first inlet opening directs fluid to a top of the cartridge to interact and dissolve the top of the cartridge and the second inlet opening directs fluid to a bottom of the cartridge to interact and dissolve the bottom of the cartridge.