Gravity-fed water purification system

1. A pre-filter system for filtering silt-laden source water comprising a pre-filter canister having an inlet for the silt-laden source water and an outlet for pre-filtered water,

wherein the pre-filter canister contains three layers comprising a singed coarse felt filter, a singed fine felt filter, and a depth filter;

wherein the singed coarse felt filter and the singed fine felt filter are butt joined together;

wherein the depth filter is a string filter;

wherein the singed coarse filter is wound around the outer surface of the depth filter; and

wherein the singed fine felt filter is wound around the outer surface of the singed coarse filter and attached.

2. The pre-filter system of claim 1 , wherein the singed coarse felt filter and the singed fine felt filter are butt joined together with a joining strip stitched to the singed coarse felt filter and the singed fine felt filter.

3. The pre-filter system of claim 2 , wherein the singed coarse felt filter is polypropylene felt with 10 micron openings, and the singed fine felt filter is polypropylene felt with 5 micron openings.

4. The pre-filter system of claim 3 , wherein the depth filter is a 5 micron string filter.

5. The pre-filter of claim 4 , wherein the singed coarse felt filter and the singed fine felt filter are wrapped around the string filter and attached using a hook and loop attachment device.

6. A device for providing purified water from a silt-laden source water comprising an upper canister, a lower canister, and a filter mounted in the upper canister;

wherein the upper canister and the lower canister are fluidly connected via the filter;

wherein pre-filtered water is collected in the upper canister and purified water is collected in the lower canister;

wherein a pre-filter is fluidly connected between the source water and the upper canister;

wherein the pre-filter has a pre-filter canister having an inlet for source water and an outlet for pre-filtered water;

wherein the pre-filter canister contains three layers comprising a singed coarse felt filter, a singed fine felt filter, and a depth filter;

wherein the singed coarse felt filter and the singed fine felt filter are butt joined together;

wherein the depth filter is a string filter;

wherein the singed coarse filter is wound around the outer surface of the depth filter;

wherein the singed fine felt filter is wound around the outer surface of the singed coarse filter and attached;

wherein the pre-filter canister is fluidly connected to receive the source water and is fluidly connected to the upper canister which receives the pre-filtered water;

wherein fluidly attached to the outlet of the pre-filter canister is a flow regulator that has an open and closed position;

wherein in the open position, the pre-filtered water flows into the upper canister; and in the closed position, the pre-filtered water does not flow into the upper canister; and

wherein the purified water collects in the lower canister.

7. The device for providing purified water from a silt-laden source water of claim 6 , wherein the singed coarse felt filter and the singed fine felt filter are butt joined together with a joining strip stitched to the singed coarse felt filter and the singed fine felt filter.

8. The device for providing purified water from a silt-laden source water of claim 7 , wherein the singed coarse felt filter is polypropylene felt with 10 micron openings, and the singed fine felt filter is polypropylene felt with 5 micron openings.

9. The device for providing purified water from a silt-laden source water of claim 8 , wherein the depth filter is a 5 micron string filter.

10. The device for providing purified water from a silt-laden source water of claim 9 , wherein the singed coarse felt filter and the singed fine felt filter are wrapped around the string filter and attached with a hook and loop attachment device.

11. The device for providing purified water from a silt-laden source water of claim 10 , further comprising a low pressure float valve in the lower canister, wherein when the lower canister is filled with filtered water, the float valve blocks the flow of water out of the filter;

wherein when the low pressure float valve blocks the flow of water out of the filter, the pre-filtered water collects in the upper canister; and

wherein the low pressure float valve is a flat piece of cross-linked polyethylene foam.

12. A device for providing purified water from a silt-laden source water comprising an upper canister, a lower canister, and a filter mounted in the upper canister;

wherein the upper canister and the lower canister are fluidly connected via the filter;

wherein pre-filtered water is collected in the upper canister and purified water is collected in the lower canister;

wherein a pre-filter is fluidly connected between the source water and the upper canister;

wherein the pre-filter has a pre-filter canister having an inlet for source water and an outlet for pre-filtered water;

wherein the pre-filter canister contains three layers comprising a singed coarse felt filter, a singed fine felt filter, and a depth filter;

wherein the singed coarse felt filter and the singed fine felt filter are butt joined together with a joining strip stitched to the singed coarse felt filter and the singed fine felt filter;

wherein the depth filter is a string filter;

wherein the singed coarse filter is wound around the outer surface of the depth filter;

wherein the singed fine felt filter is wound around the outer surface of the singed coarse filter and attached;

wherein the pre-filter canister is fluidly connected to receive the source water and is fluidly connected to the upper canister which receives the pre-filtered water;

wherein fluidly attached to the outlet of the pre-filter canister is a flow regulator that has an open and closed position;

wherein in the open position, the pre-filtered water flows into the upper canister and in the closed position, the pre-filtered water does not flow into the upper canister;

wherein the purified water collects in the lower canister;

wherein the singed coarse felt filter is polypropylene felt with 10 micron openings, and the singed fine felt filter is polypropylene felt with 5 micron openings;

wherein the depth filter is a 5 micron string filter;

wherein the singed coarse felt filter and the singed fine felt filter are wrapped around the string filter and attached with a hook and loop attachment device;

wherein a low pressure float valve is in the lower canister, wherein when the lower canister is filled with filtered water, the float valve blocks the flow of water out of the filter; and

wherein when the low pressure float valve blocks the flow of water out of the filter, the pre-filtered water collects in the upper canister.