Point of Use Water Treatment
See Blake Equipment's Point of Use Product Line
Do I Need a Point of Use Water Treatment System?
Point-of-Use (POU) devices treat water at the point of consumption. The technology provides the final barrier to the contaminants of concern before the water is consumed or used. Some common reasons POU water treatment is used:
- To remove taste or odor such as chlorine
- Eliminate suspected bacteria, viruses or other biologicals
- Final polishing of water for a specific use(healthcare, medical, electronics)
How do Point of Use Water Treatment Systems Work?
Results of water testing and desired quality will determine what water issues and how they will be addressed at the point of use. Here are the systems that are available today, what they treat and how they work. Your water treatment dealer will help you select the right solution for your situation.
Reverse-osmosis(RO) devices are typically installed underneath the sink or on the counter next to the sink although whole house treatment systems are available. Reverse Osmosis units are self contained compact purification systems capable of filtering out sediment, chlorine, taste and odor. They are capable of filtering out 90% to 99% of common chemical contaminants(metal ions, aqueous salts) including sodium, choride, copper, chromium, and lead; may reduce arsenic, fluoride, radium, sulfate, calcium, magnesium, potassium, nitrate and phosphorous.
Ultraviolet water purification is the most effective method for disinfecting bacteria from the water. Ultraviolet (UV) rays penetrate harmful pathogens in your home’s water and destroy them by attacking their DNA, rendering them unable to reproduce. Ultraviolet filters are simple, effective and safe. They use about the same energy as a 60 watt light bulb and the only maintenance required is changing the bulb once a year. UV systems destroy 99.99% of harmful microorganisms without adding chemicals or changing your water’s taste or odor. UV light does not eliminate contaminants such as chlorine, heavy metals and VOC’s (Volatile Organic Compounds) so they are usually used with other forms of filtration such as reverse osmosis systems and carbon filters.
Activated Carbon Filters
Activated carbon is an effective method for treating certain organic compounds, chlorine, unpleasant tastes and odors, though it is not effective for metals, nitrates, microbial contaminants and other inorganic contaminants. Selection of an activated carbon system should be based on water analysis and assessment of the individual homewoner’s needs and situation. Regular replacement of the filter/cartidge is a critical factor in maintaining effectiveness and reducing baterial contamination of the filter. The NSF and the WQA test and certify products and this certification can help guide selection.
Point of Use Filters
Filtration is defined as the process of separating suspended matter from a liquid. Catridge filters are the simplest type of point of use devices. They provide a mechanical barrier and trap suspended particles on the surface of the cartridge membrane. Selection of the cartridge material, cartridge design, size and particle micron rating best suited for the application will best be determined by your water treatment professional.
Caution: Extreme care must be exercised when using a treatment unit as a remedy for a health- related problem since their is no foolproof way of knowing when the treatment system may fail. Connection to a safe water supply, well repair or replacement, or use of bottled water is recommended for obtaining drinking water when the water supply is contaminated.