Special Mid-Month Issue
Income Tax Day, April 15, 2013
Read the Pure Water Gazette online. “Vast piles of information about water in theGazette’s tangy, irreverent style.” —Dallas Times Herald.
We hope you’ll read the Pure Water Gazette’s “Today’s Top Water News” section. New articles appear daily. Some examples of recent posts are included in his issue
In the News
Utah Governor Gary Herbert won praise of environmental groups and residents of Utah’s Snake Valley by refusing to sign an agreement that would have given half of the ancient aquifer under Snake Valley to thirsty Las Vegas. But . . . it may not be over yet.
More from the Pure Water Gazette.
Sprite shower filters make you sing better.
An extensive (and expensive) WQA-funded research project indicates that well-tuned, efficient modern water softeners seem to be good for home septic systems, but older, less-efficient softeners degrade the performance of home septic tanks. In general, metered softeners are more efficient than timer models when they are correctly programmed. The twin softener pictured above, controlled by an electronic meter, is most efficient of all. Read all about the WQA research in the Pure Water Gazette.
Mid-Sized Reverse Osmosis: A Product That Satisfies Many Needs
Between small reverse osmosis units that reside under kitchen sinks to provide drinking water and “whole house” RO units large enough to supply the needs of an entire residence, there has always been a need for a mid-sized system to fill special needs.
If the owner of a small greenhouse, for example, wants enough high quality water to fill a tank to mist his orchids and another tank for general use, it is handy to have a small but powerful reverse osmosis unit that can keep the tanks full and the plants happy.
If the owner of a small portable window washing business needs to fill his truck’s tank at night while he’s asleep with enough low-TDS water to keep his customers’ windows spot free, a compact but powerful reverse osmosis unit is a great thing to have.
If the owner of a small manufacturing plant wants to provide plenty of excellent water for the break room and kitchen area and have enough left to allow his employees to fill their water bottles, an efficient, trouble-free mid-sized reverse osmosis unit can fill his need at a relatively small cost and with little upkeep.
If the owner of a larger home wants to send excellent drinking water to his kitchen sink, to his bar, to an icemaker, and to an upstairs bathroon, a compact but powerful mid-sized RO unit is just what he needs.
Then there are those who want to fill a small outdoor pond or an aquarium with fish-friendly water, small-scale water vendors, restaurant and health food store owners–in short, anyone who needs a hundred or two gallons per day of top quality water–all of these will benefit from having a good mid-sized RO unit.
The Axeon LT300 is a compact but powerful reverse osmosis unit capable of putting out 15 gallons per hour of highest quality water for drinking or a variety of other uses. The LT300 can be used for small greenhouses, spot-free car washing, aquariums and fish ponds, window washing businesses, cleaning solar panels, coolers, humidifiers, small water vending enterprises, and much more.
It can be used with a traditional reverse osmosis pressure tanks, with non-pressurized holding tanks, or with no tank at all if a large flow rate isn’t required.
The unit is ideal for a large home with high water demand, with plenty of water pressure and capacity to furnish not only drinking and cooking water, but multiple refrigerators, ice machines, etc.
The Axeon LT300 is an ideal unit for small businesses, making enough water to service a modest kitchen and lounge area and even to provide laboratory quality water for special functions like an in-house test lab or pharmacy.
The two “continuous duty” pumps are capable of around-the-clock service if large quantities of water are needed.
Here are some of the LT300’s features:
- 300 Gallon Per Day Production.
- Can be used with either atmospheric or pressurized storage tank.
- Dual Aquatec 8800 Booster Pumps run the unit at a comfortable 100 to 125 psi.
- Uses standard 9.75″ X 2.5″ filter cartridges.
- Delivered completely assembled. Ready to install and use.
- Pressure gauge allows constant monitoring of membrane pressure.
- Shuts off automatically with either float switch control or 40 psi backpressure from pressure tank.
- Wall mounts for easy access.
- Quiet, vibration-free operation.
- Many uses: drinking water, aquariums, small ponds, organic gardening, greenhouses, spot-free car washing.
- Typical TDS rejection is 95% plus. Can produce zero TDS water with the substitution of a DI cartidge in the final filter housing.
- 3/8″ Inlet and Outlet. 1/4″ drain.
- Automatically does a 30-second membrane flush upon startup and after every hour of continuous operation.
- Uses standard parts throughout. Parts and replacement cartridges are easy to obtain.
- Fully automatic. It shuts off when the tank is full and produces water when there is a demand.
- Built in USA by Axeon (formerly RO Ultratec), one of the nation’s most experienced RO makers and parts suppliers.
- An outstanding design. Compactly built, but very accessible for service.
The Axeon LT300 RO unit produces 300 gallons per day of top quality water that can be used for a variety of purposes. The LT300 comes fully assembled–ready to use. You need only a water source, access to a drain, a storage tank, and a 110 volt electrical source.
The Axeon LT300 is available from Pure Water Products for only $995–shipping included to lower-48 addresses. Pure Water Products also stocks all parts and replacements and provides phone support for installation and upkeep. It’s coming soon to our main website, but in the meantime you can order by phone at 940 382 3814.
Rain Gardens are natural water savers that enhance the beauty of homes and serve as natural filters for polluted water. Is it a good idea to grow edible plants in rain gardens, since they will be watered with polluted urban stormwater? Australian researchers are working on the answer.
Grazing in the Rain Garden
By Janice Kaspersen, Editor, Stormwater.
Rain gardens are now a common sight in many cities, but finding the right mix of plants to include in a rain garden can be challenging. For the people whose homes or businesses they occupy, the plants’ attractiveness is usually a priority. In some areas, you need to make sure the plants can withstand dry spells; you don’t want to end up irrigating your rain garden.
It’s been suggested that rain gardens be used to grow vegetables, and at first glance this seems to be a good two-birds-with-one-stone solution: growing something useful with a resource we’ve saved from going down the drain. But some have raised an alarm about the dangers of eating what we’ve irrigated with urban stormwater. One purpose of a rain garden or bioswale, after all, is to help filter pollutants from runoff; in high-traffic urban areas, pollutants might become concentrated in the soil, and plants uptake many of them, so do we really want to eat what grows there?
Yes, some Australian researchers say, we do. An ongoing experiment at the University of Melbourne is using roof runoff to irrigate two rain gardens planted with vegetables. Two conventional vegetable gardens—irrigated from the public water supply—are located nearby, and all four are heavily monitored.
In fact, the researchers say, nutrients that commonly enter runoff from landscape fertilization are actually beneficial to the plants. And other pollutants like metals haven’t been a problem so far; according to one researcher, “The filter layers in the rain garden are also doing their work by preventing heavy metals from urban water runoff entering our waterways, while also remaining at safe levels in plants. In contrast we revealed that crops irrigated by tap water actually contained higher levels of copper due to the pipes used.”
Granted, the Melbourne experiment is using roof runoff rather than street runoff as the source of irrigation. But it’s this type of experiment—rather than speculation or guesswork—that we need to see more of.
Copper In Water. How Does It Get There and How Do You Get It Out?
Health Effects of Copper
Water Treatment for Copper
Hot Tap Water Can Be a Hazard to Your Health
The Water Quality Association defines alkalinity as “the quantitative capacity of water to neutralize an acid.” In other words, it’s a measurement of how much acid can be added to water without changing its pH.
Alkalinity in water is usually made up of bicarbonate (HC03), carbonate (CO3) and/or Hydroxide (OH), but phosphates and silicates can also play a role.
The related term, “total alkalinity,” frequently called TA, is defined as “the amount of acid required to lower the pH of the sample to the point where all of the bicarbonate [HCO3-] and carbonate [CO3–] could be converted to carbonic acid [H2CO3].”
Although alkalinity is related to pH, it isn’t the same thing. High levels of alkalinity stabilize the pH, but water does not have to have a high pH to have a high level of alkalinity. As alkalinity is the capacity of water to neutralize its acidic content, alkalinity therefore measures how much acid can be added to a water body without changing the pH level significantly
Alkalinity is not regulated as a water contaminant, but it is often tested since it is a factor in amending and controlling pH.
Treatment of Alkalinity: In most cases, there is no reason to want to alter the water’s alkalinity itself, but changing alkalinity is often involved in changing the pH. Neutralizing treatments with such items as Soda Ash or limestone (calcite) usually raise the alkalinity level as well as the pH.
How Reverse Osmosis Tanks Work and How to Take Care of Them
By Pure Water Annie
Gazette Technical Wizard Pure Water Annie Clears Up the Persistent Questions about Reverse Osmosis Tanks That Have Been Keeping You Awake at Night
A reverse osmosis tank is simply a miniature well tank. Pressure tanks on wells and RO tanks work the same way.Water enters and leaves the tank through the same tube.
Servicing Reverse Osmosis Tanks
Some of the tank’s inner capacity is taken up by air and part is taken up by the bladder. Therefore, for practical purposes, the stated volume in gallons of the tank is about twice what the tank will actually hold in terms of usable water. You’ll get about two gallons of usable water from a four gallon tank. This will vary according to your inlet water pressure, the temperature of the water, the condition of the membrane and prefilter of your RO unit, and a few other variables. But don’t expect four gallons of water from a four gallon tank. On the other hand, two gallons is a lot of water unless you’re filling an aquarium or hosting a dinner party for 18.
Early April Water News
- Head of Pacific Institute Honored on World Water Day — April 1, 2013.
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