FAQ's + Information

 

Comparison table of water filtering options

Unit

Advantages

Disadvantages

Distillation System

Removes all inorganic salts and destroys bacterial and viral contaminants. Beneficial minerals can be added back to drinking water.

Requires electrical connection. Some units may concentrate volatile chemicals contaminants. Uses excessive amounts of energy. Creates heat. Output relatively low.

Activated Granulated Charcoal Filter

Inexpensive. Removes foul tastes and odors, some carcinogens (cancer-causing agents) and hazardous chemicals (insecticides, chlorine, chloroform, iodine, formaldehyde)

Can support runaway multiplication of bacteria. May remove symptoms or chemical contaminants without removing the contaminants. Requires sufficient holding time to be effective. Does not remove bacteria, cysts, heavy metal, nitrates, asbestos and other fine particles.

Carbon Block Filter

Removes foul taste and odors, most carcinogens and hazardous chemicals, bacteria, cysts, asbestos, and other fine particles. Catalytic carbon will remove hydrogen sulfide as well. Prevents water form "channeling" ensuring proper contact time.

Does not remove heavy metals, nitrate, and disinfection by-products (DBP's) of chlorine such as trihalomethanes and chloramines. Does not remove hydrogen sulfide. Easily plugged if pre-treatment is inadequate.

Bacteriostatic Charcoal Filter

Suppresses growth of bacteria within charcoal bed.

A same disadvantage of ordinary carbon filters regarding, cysts, heavy metal, nitrates, asbestos and other fine particles. No way of knowing when effectiveness against bacteria is depleted. May add silver to the water.

Carbon Block Filter with Deionizing Resin

All of the advantages of carbon block filters above. Will remove most heavy metals as well

Relatively expensive. Does not remove all DBPs. Can become rapidly depleted if water is high in nitrates and chlorine. Easily plugged if pretreatment is inadequate.

KDF Redox Filter Media

One of the most effective means of removing chlorine, chloramines, and other DBPs. Removes heavy metals. Does not remove healthful minerals. Releases beneficial zinc and copper chelates into the water. Renders water Bacteriostatic.

Relatively expensive. Does not remove bacteria, viruses, cysts, asbestos, and other fine particles. Does not remove all volatile organic chemicals, pesticides or herbicides.

KDF | Carbon Block System

Combines all the advantages of carbon block and KDF. Produces water almost as free of harmful contaminants as RO while retaining minerals. Less expensive then RO. Does not waste water. Inexpensive to maintain.

Does not remove high levels of sodium chloride. If water has high levels of sodium, or other unusual problems, RO with TFC membrane, KDF pretreatment and UV disinfection become the treatments of choice.

Reverse-Osmosis System

Removes nitrates, asbestos, Fluorides, sodium and other dissolved salts. Removes heavy metals, chlorine, and DBPs. Can produce high quality drinking water. Minerals can be added back to product water.

Relatively low output. Can wastelarge amounts of water. Does not work well if water is very cold and pressure is not at least 40 psi or more. Units with cellulose acetate (CA) or cellulose triacetate (CTA) membrane may leach dangerous 1,4 dioxane into the water, units with thin-film composite membranes are easily damaged by chlorine so adequate pre-treated with carbon or KDF required. Runaway growth of bacteria in storage tank and carbon post-filters necessitates the use of UV light ahead of tap.

Ultraviolet Purifiers (UV)

Effective in destroying bacteria when operating at full efficiency on clean water. High flow capacity. Relatively low power consumption.

Requires electrical connection. Does not remove chemicals, taste and odors, asbestos, nor any other non-biological contaminants. Efficiency and effectiveness can drop off without warning. Water must be clear with very low turbidity to be effective.

Ozonization System

Effective in destroying bacteria, some viruses, and many substances that impart foul tastes and odors to water. Oxidizes iron, manganese and hydrogen sulfide, reducing them to insoluble forms so they can be filtered. Oxidizes many volatile organic chemicals.

Relatively expensive to install and maintain. Requires electrical connection. Does not remove nitrates, sulfates, or dangerous heavy metals.