Water filter cartridge having tank limescale protection

A water filter cartridge device comprising:

• (a) a water filter housing having an inside surface, an outside surface, an inlet, an outlet and a filter disposed between the inlet and the outlet and an internal flow guideway from the inlet through the filter and out the outlet;
• and
• (b) a receptacle containing a means to counter precipitates disposed on the outside surface of the water filter housing and isolated from the inside surface of the water filter housing,
• wherein said receptacle having at least one opening to communicate with a fluid surrounding the outside surface of the water filter housing to provide an external flow path between the outside surface of the water filter housing and the fluid surrounding the water filter housing,
• wherein the receptacle has at least one receptacle inlet and at least one receptacle outlet for water to flow from the either the outside surface of the water filter housing or the outlet of the water filter housing into the external flow path and each receptacle inlet is structurally independent of the inlet and outlet of the water filter housing and each receptacle outlet is structurally independent of the inlet and outlet of the water filter housing;
• wherein the water filter housing and receptacle provide separate and different treatments for water so that a failure or depletion of one does not result in a failure or depletion of the other.

A water filter cartridge device comprising:

• (a) a water filter housing having an interior surface, an exterior surface, a water inlet, a water outlet and a first water treatment chamber disposed between the water inlet and the water outlet,
• wherein untreated and/or partially pretreated water from a tank or water reservoir travels through a flow guideway from the water inlet through the first water treatment chamber and out the water outlet and out of the tank or water reservoir;
• and
• (b) a combined water inlet and outlet and a second water treatment chamber disposed on the exterior surface of the water filter housing and isolated from the first water treatment chamber inside the water filter housing,
• wherein said second water treatment chamber contains a chemical composition to prevent precipitation deposits in the tank or in the water in the tank or water reservoir
• wherein water from the tank or water reservoir containing untreated and/or partially pretreated water travels from the combined water inlet and outlet through a flow path to the second water treatment chamber and then out the combined water inlet and outlet into the tank or water reservoir containing untreated and/or partially pretreated water before the water enters the water inlet of the filter housing,
• wherein the flow guideway is structurally separate and distinct from the flow path.

A water filter cartridge device (1) comprising:

• a housing (2) and a filter-side tank connection element (3) for insertion into a water tank (10),
• wherein the housing has an inlet, an outlet, an inside section, and outside surface, and a filter section (4) to treat water (8), wherein water taken from the water tank flows through a flow guideway from the inlet to the outlet of the housing, and
• a reservoir chamber (6) with a means (5) to counter precipitations in the water tank,
• wherein the reservoir chamber is disposed on the outside surface of the housing,
• wherein the reservoir chamber has at least one flow passage to the means to counter precipitations in the water tank,
• wherein the reservoir chamber has at least one reservoir inlet and at least one reservoir outlet for water to flow into and out of the at least one flow passage and each reservoir inlet is structurally independent of the inlet and outlet of the housing and each reservoir outlet is structurally independent of the inlet and outlet of the housing;
• wherein the water in the flow passage is separate and distinct from the water in the flow guideway.

A water filter cartridge device comprising:

• (a) a water filter housing having an inside surface, an outside surface, an inlet, an outlet and a filter disposed between the inlet and the outlet and an internal flow guideway from the inlet through the filter and out the outlet;
• and
• (b) a receptacle containing a means to counter precipitates disposed on the outside surface of the water filter housing and isolated from the inside surface of the water filter housing,
• wherein said receptacle having at least one opening to communicate with a fluid surrounding the outside surface of the water filter housing to provide an external flow path between the outside surface of the water filter housing and the fluid surrounding the water filter housing,
• wherein the receptacle has at least one receptacle inlet and at least one receptacle outlet for water to flow from the outside surface of the water filter housing into the external flow path and each receptacle inlet is structurally independent of the inlet and outlet of the water filter housing and each receptacle outlet is structurally independent of the inlet and outlet of the water filter housing;
• wherein the water filter housing and receptacle provide separate and different treatments for water so that a failure or depletion of one does not result in a failure or depletion of the other.