Water filters, Reverse Osmosis, Water treatment, Water coolers, Distillers

Different Methods of Filtration

What type of filtration is the best? There truly is no accurate answer to this question. The best filtration is based on the application, desired performance and any specific requirements.

These definitions are generalities and are intended as simple descriptions.
Mechanical filtration is a process by which water is driven through filtration media(s). There are many different types of media to accommodate different needs. Mechanical filtration of particles is rated by micronage. The smaller the micronage, the finer the filtration. The larger the micronage, the coarser the filtration, the longer the lifetime. Generally, mechanical filtration requires no electricity and it requires about a minimum of 30 psi water pressure. A high-grade mechanical filter is sufficient to remove most impurities that people are concerned with today. These impurities include: Chlorine, lead, cysts, VOCs, THMs and all kinds carcinogens and industrial pollutants. Generally, mechanical filtration is not a good choice for the reduction of Fluoride, Nitrates, Sodium or hardness minerals. For these problems Distillation or Reverse Osmosis is recommended.
Distillation is a process of filtration by which water is boiled. The water is caused to evaporate. The evaporation is then trapped and cooled. Distilled water is basically condensation. Distillation is an excellent choice for customers who want to "remove everything". Because the water is boiled and then cooled, the water seems to taste somewhat flat. Keep in mind that distillers require maintenance, much like a coffee maker or humidifier. The minerals build up on the heating element and need to be de-scaled. Distillers work with electricity and do build up heat.
Reverse Osmosis is a method of filtration by which the water is first mechanically filtered and then the water is pressed through a semi-osmotic membrane. The membrane separates water for the rest of the total dissolved solids (impurities). Then the water is passed through a carbon block filter. The reverse osmosis process is slow and therefore requires a holding reservoir of some type. The reverse osmosis process produces waste water. Reverse osmosis is also an excellent choice to "remove everything" . There are 2 important things that effect the performance and lifetime of the unit. Reverse Osmosis (just like distillers) perform better in soft water. Secondly, incoming water pressure is essential to R/O performance. The minimum requirement for most units is 50 psi.