Single Tank, Electric Demand Water Conditioners Newer units such as these measure water usage to determine the best time to regenerate. But such systems are typically not as efficient as systems that employ two resin tanks. If regeneration is necessary at a time of the day when soft water may be needed, they must wait until a more appropriate time to regenerate so hard water isn't introduced into the home. To do so, single tank DIR units must employ a reserve capacity of softening resin to make it through the rest of the day. If the reserve isn't enough, the home will be forced to use hard water until the system regenerates. If the reserve is too large, the system won't be used to capacity but regeneration will occur anyway, wasting water and regenerant.
Twin Tank, Non-Electric Demand Water Conditioners Twin tank systems measure water usage and regenerate only when the system has been used to capacity for optimum efficiency. Because twin tank systems automatically switch from tank to tank as they exhaust, they are able to provide a continuous supply of conditioned water, 24 hours a day. Some systems even use soft water to clean themselves to improve efficiency. Countercurrent regeneration also improves the systems' effectiveness. This process, which is recommended by most resin manufacturers, regenerates the resin beads more efficiently by reversing the flow through the system during the cleaning process.
Additionally, leading consumer publications including Consumers Digest have recognized that non-electric, twin tank DIR water conditioners have distinct advantages over those that operate with electricity. Electronic components are the most frequent things to malfunction on electric systems and can be expensive to repair. Non-electric systems do not suffer from such problems and are not susceptible to power outages. Water conditioners may be designed to help with other water problems, too, including the reduction of radium, barium and excess iron. In severe cases, however, a separate system may be required for proper performance.
PROBLEM WATER What Is Problem Water? Some water contains troublesome elements or has characteristics which can make it very unpleasant to use or damaging to things that it touches. Among them are iron, manganese, hydrogen sulfide and acidity.
Iron Iron typically rears its ugly head as rusty orange/brown stains, streaks or spots on clothing cleaned in a washing machine. Stains also appear on bathtubs, sinks and faucets. Even small amounts of iron can cause problems. Iron in concentrations as low as .3 parts per million can cause staining. And iron staining can be difficult to remove; cleaning may require special solvents. Iron can also clog pipes and damage the internal parts of water-using appliances. Iron is generally found in well water, although city water users are not immune from the problems associated with it. Solving Iron Problems No matter which form iron appears in, there is a solution available. Typically one of the following two methods is used:
Water Conditioners Common home water conditioners can remove average amounts of dissolved iron from a family's water supply. When a water supply has dissolved iron, water drawn from the tap appears clear but turns a color when left in a cup.
Multi-Stage Iron Removal Systems When iron is not dissolved (ferric) or appears in excessive amounts, a specialized iron removal system may be required. Aeration equipment or chlorine can be used to change the dissolved iron into ferric iron, which is filterable. The ferric iron can then be removed by special automatic backwashing filters, leaving the water clean and clear. In some cases, special filters can perform both the oxidation and filtration functions.
Chlorine Chlorine is typically used by municipal water suppliers for disinfection, but it can dry skin and hair. Chlorine can also be inhaled in shower steam; some question the long-term health effects it has on the body.
Chlorine can be easily removed by installing a carbon filtration system where the water enters the home. Combination systems that soften and dechlorinate water are also available and eliminate the need to purchase separate softening and filtration systems.
Hydrogen Sulfide Hydrogen sulfide (commonly referred to as "sulfur"), although not a cause of staining, leaves water with an obnoxious "rotten egg" odor that makes it unbearable to drink, cook with or even bathe in. Because it is a weak acid, hydrogen sulfide can also promote corrosion. And its presence in the air causes silver to tarnish in seconds. High concentrations are flammable and can be poisonous.
Luckily, hydrogen sulfide can be removed using specially-designed sulfur system that employs sulfur removal media. Such systems typically eliminate the need for expensive, multi-stage configurations that require several pieces of equipment.
An excessive amount of hydrogen sulfide can be removed by first using aeration or chlorination to convert it into elemental sulfur, a yellowish powder that can be removed with filters. The process works similarly to that which is used to filter iron from water.
Acid Water When water is acidic, it must be neutralized or it will cause corrosion of plumbing and fixtures, and could damage water-using appliances. A neutralizer containing calcite is often used to reduce water acidity. As water flows through the tanks, the calcite dissolves into the water and neutralizes its acidity. It also adds hardness minerals to the water, which can then be removed by a water conditioner.
A Final Note Whatever system you choose, whether it's for drinking water, whole-house softening, problem water filtration or a combination, you can rest easy knowing that you're protecting the quality of your family's water. And you won't be alone; according to the WQA study mentioned earlier, one out of every ten people who don't currently own a water treatment system plan to purchase one within the next year. And 55 percent said they would be more likely to purchase a home with a water treatment device.
The availability of water treatment products makes it easy for you to make your water your next home improvement project.
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