Abstract: Water filter with self-rinsing capability that includes filter housing, hollow cartridge core, and mesh filter. The filter housing includes a hollow housing with top and drain openings, a top cover with inlet and outlet ports, a one-way pressure valve, and a drain tap that includes a rod, an opening and closing knob that is connected to the rod, and an opening and closing barrier with passageway that is connected to the rod. The cartridge comprises of a tube with inlet and outlet passageways, and spray pipes with spray nozzles, and enables water to flows from the tube into the spray pipes and outside into the filter housing through the nozzles. The mesh filter has a shape of a hollow cylinder that is worn on the tube in a gap between the tube and the spray pipes.

Abstract: A water treatment device including: (a) a compartment for containing a water treatment chemical; (b) a filtration unit operatively connected and fluidly communicating with the first compartment; (c) a housing containing the compartment and the filtration unit; (d) a first opening in the housing for introducing feed water into the housing; (e) a second opening in the housing for discharging treated water therethrough, and (f) at least one sealing element, disposed within the housing, so as to fluidly seal between the feed water and the treated water.

Abstract: An apparatus for treatment of water comprising a first compartment containing a filtration unit for receiving untreated water, a second compartment containing polyphosphates, a housing containing the first compartment and the second compartment, and a polyphosphate dosing unit comprising a partition between said first compartment and said second compartment, an inlet tube, affixed to the partition, allowing a small portion of water filtered in the first compartment to flow into the second compartment containing polyphosphates, an outlet tube, affixed to the partition, from which the flow of polyphosphate-containing water is drawn out of the second compartment by the Venturi effect, wherein the filtration unit in the first compartment produces filtered water, the major portion of which, other than said small portion of water flowing into said second compartment, being discharged without contacting polyphosphates, such that the amount of polyphosphate distributed in the water is substantially proportional to th