One of the most common ways that water is purified is by passing it through pebbles, sand, charcoal, gravel, and twigs. If contaminated water is poured onto fine sand, the water is going to travel down until it reaches the saturation level. The other chemicals that are mixed with the water though, will be held back by the sand until only the water is left. A major drawback is that it cannot filter out small and tiny impurities and particles.

Water distillation is the process of boiling water in a chamber creating steam. As the vapour rises, it passes through cooling coils and collects as pure water. All of the contaminants are left behind in the boiling tank and gases that vaporize at temperatures lower than the boiling point of water are released through volatile gas vents. In essence, distillation duplicate's Mother Nature’s cycle of evaporation and precipitation. A drawback with this purification process is that the good minerals naturally found in our water cannot be vaporized.  This method is often used for chemical testing in labs

This type of water purification is a common method for treating water through the use of man-made resins. The resin comprises tiny polymeric beads which are specifically formulated so that they can be charged with certain ions.  Calcium and magnesium, the causes of scale and scum from hard water, are referred to as ions, and as water passes through the resin, the calcium and magnesium ions swap places with the sodium ions on the resin.  Sodium salts, unlike calcium and magnesium ions, are highly soluble so sodium does not cause scale or scum.  When all the sodium ions have been exchanged for calcium or magnesium, the resin must be regenerated by recharging it with sodium ions.  This is done by flushing the resin with salt solution (brine).
A major drawback is that it does not eliminate bacteria.

When a compartment containing a dilute solution is connected to another compartment containing a concentrated solution by a semi-permeable membrane, water molecules move from the dilute solution to concentrated solution. This phenomenon is called osmosis. As the water molecules migrate through the semi-permeable membrane, water level in the solution will increase until the (osmotic) pressure prevents a net migration of water molecules in one direction. A pressure equivalent to the height difference is called the osmotic pressure. By applying pressure in the higher concentration solution, water molecules migrate from a high concentration solution to a low concentration solution. This method is called reverse osmosis water filter system.  A drawback for this purification process is that it removes all the good minerals that are naturally found in our water.

Ultrafiltration (UF) is very similar to the Reverse Osmosis process.   It has a variety of membrane filtration in which hydrostatic pressure forces a liquid against a semi-permeable membrane. Suspended solids and solutes of high molecular weight are retained, while water and low molecular weight solutes pass through the membrane. Ultrafiltration (UF) is used to remove essentially all colloidal particles (0.01 to 1.0 microns) from water and some of the largest dissolved contaminants. The pore size in a UF membrane is mainly responsible for determining the type and size of contaminants removed. In general, membrane pores range in size from 0.005 to 0.1 micron.  The advantages of UF Membrane Purification is that it covers all the disadvantages of the above Water Purification processes because it can filter out tiny impurities and particles, bacteria, and  it retains all the good minerals naturally found in our water.  This makes the UF Membrane Purification far more superior than any other Water Purification systems on the market.