Control unit for hot and cold water

A control unit for mixing hot and cold water comprising:

• a cartridge having at least one position groove and two let-in cavities,
• a valve seat connected to said cartridge, said valve seat including:
• water flow connections,
• a plurality of lugs, at least one of said plurality of lugs engages said at least one position groove, and
• two let-in catches, each of said let-in catches engages a respective one of said two let-in cavities,
• a fixed disc connected to said valve seat, said fixed disc having
• a plurality of flutes passing therethrough such that each of said plurality of flutes engages a respective one of said plurality of lugs,
• a plurality of openings passing therethrough in communication with said water flow connections of said valve seat, and
• recessed peripheries to match said two let-in catches such that said fixed disc fits within said valve seat without impinging said two let-in catches,
• a movable disc adjacent to said fixed disc such that said movable disc slides over said fixed disc, said movable disc having a plurality of cavities and a mixing chamber in selective communication with said plurality of openings of said fixed disc depending on a relative position of said movable disc to said fixed disc,
• a rolling plate attached to said movable disc, said rolling plate including engagement cavities and a check pawl to engage said plurality of cavities of said movable disc, and
• a control rod having a fork engaging said engagement cavities of said rolling plate;
• and
• wherein said control rod moves said movable disc relative to said fixed disc during use to bring said mixing chamber into communication with at least two of said plurality of openings of said fixed disc to cause water to flow through said control unit.