19.05.2014
POST a QUESTION or READ FAQs about using filters to purify drinking water; what types of portable or temporary water purifying filters are available; what types of more permanent water purifying filters are installed? Here we explain and help choose among the types of portable water purification filters that can be used to sterilize water for drinking purposes when traveling, camping, and in emergencies when the normal water supply is not available or is not sanitary.
The best procedure if you don't know much about the water condition is to filter it before and after it is treated with bleach, chlorine, iodine, or other sterilization methods. This article series outlines methods to purify or sanitize drinking water in an emergency following a disaster such as an earthquake, flood, or hurricane. A companion article, DRINKING WATER EMERGENCY SOURCES,describes possible sources of drinking water that may be useful in emergency conditions. Purifying filters use materials such as ceramic filters which have extremely fine pores to filter out harmful bacteria and protozoa. Some more recent single or multi-stage microfiber water filters have a very high gallon capacity and most models can simply be cleaned and re-used. Portable water filters all include a pump, usually a manual or hand pump, which forces water through a very fine ceramic filter cartridge, delivering a clean, if slow stream of potable drinking water.
If you care, be sure to check the type of filter used in the specific model of portable water filter you are considering, as several manufacturers offer more than one filter type across their model line.
The Katadyn Hiker water filter (above left) produces 1 liter of water per minute (depending on how fast you operate the pump handle), or a measure we like better, it produces one liter of filtered water in 48 pump strokes. The pump accepts water in from a fitting at the device bottom, and pushes filtered water out from a fitting at the filter top. The Katadyn Hiker water filter uses a 0.3 micron pleated glassfiber (fiberglass) filter with an activated charcoal core to remove bacteria, cysts, and sediment (Klebsiella terrigena, Giardia, and Cryptosporidium). Katadyn produces three groups of water filter products: an Endurance Series (higher capacity, extreme use conditions, can handle highly turbid (murky) water), Backcountry series (1-2 persons, suitable for clear or slightly turbid water), and the Ultralight Series product described above, intended for single person use and a clear water source outdoors or while traveling and staying at hotels that may provide a questionable water supply.
The filter system includes a block of activated charcoal to assist in removing water odors and some chemicals (and thus water taste). Other, heavier, larger ceramic water filter systems such as a model we used during weeks of rafting down the Colorado River, are intended to deliver a larger quantity of potable water: these models can be inserted into a larger container of water. The photo at left (courtesy Katadyn) shows a replacement ceramic filter element for a Katadyn Pocket filter system. In the event that the municipal water supply system is working after a hurricane, flood, or other disaster, companies like Katadyn also produce water filters that can be attached to a faucet and are operated by system water pressure.
Charcoal water filters are often used as a step in water treatment systems, combined with a chlorination system. More recent on the portable water filter market than ceramic and charcoal water filters are hollow-fiber membrane water filters that can be used as a drinking-straw type filter allowing drinking directly from a water source or as filters to fill a water bottle from a water source.
In smaller size and at lower prices some of these units weigh only a couple of ounces and are very compact. Magnetic water filters and purifiers: are junk science and are not a reliable means of assuring safe drinking water.
Paper, charcoal, or other water filter cartridges can be used in an emergency, however, to pre-filter water that is to be further treated with a disinfectant. The filter is good for 1500 liters of water - but presumably less than that total quantity, possibly much less, for water that is very contaminated or plain dirty. Locate the RO system in the building and follow the water piping leaving that device so that you are sure to take drinking water only from fixtures that are supplied with treated water. See REVERSE OSMOSIS WATER TREATMENT for photographs of what RO equipment looks like and other details about that water treatment method. Portable reverse osmosis water treatment equipment is available from companies such as Crystal Clear Supply. Silver ceramic water filters are ceramic water filters which have been treated with colloidal silver - a step which increases filter effectiveness by killing bacteria in water passing through the system.
Sink cartridge water filters: We would not rely on the smaller store-bought filter cartridges that are simply attached to the tip of a kitchen sink faucet without clear documentation about just what that filter cartridge can remove from water, and how many of gallons of water it can process before it is exhausted. In contrast,CERAMIC FILTERS for WATER DISINFECTION for water as well as some more recent single or multi-stage microfiber water filters have a very high gallon capacity and most models can simply be cleaned and re-used. The SteriPen® works by combining a battery-operated UV light combined with a mixing wand that is inserted into a container of water.
To operate the SteriPen® the user uses a slide switch to select the volume of water to be treated and to turn on the device. As we discuss in more detail at UV ULTRAVIOLET LIGHT WATER TREATMENT, the proper UV light selection for water treatment is critical in the success of this approach. The UV light must have been properly selected to handle the volume and flow rate of the water supply where it is installed. UV light will kill Giardia trophozoites but the real concern for drinking water is the cysts, since it is the cysts from stool that appear there. UV light for water disinfection where Giardia is present has, however, been successfully used in combination with chlorination as an approach to killing Giardia in water. We do not anticipate that UV light systems will be working in a disaster area, and we are doubtful that one can rely on this process for emergency drinking water purification: even if a UV light system is working, it will at kill bacteria and similar pathogens only. But if emergency generators or emergency electrical power are being provided to run a local water pump intended to provide drinking water, be sure that power is also provided to the UV light or to any other water treatment equipment that is installed in your location.
Therefore even if you return a private well and water treatment equipment to operation, the water may not be safe to drink. See UV ULTRAVIOLET LIGHT WATER TREATMENT for details of residential type UV light water treatment systems as well as a discussion of when such systems are useful and appropriate.
Continue reading at GIARDIA in DRINKING WATER or select a topic from the More Reading links or topic ARTICLE INDEX shown below. Try the search box below or CONTACT US by email if you cannot find the answer you need at InspectApedia. Hankey and Brown home inspectors, Eden Prairie, MN, technical review by Roger Hankey, prior chairman, Standards Committee, American Society of Home Inspectors - ASHI. Arlene Puentes, a licensed home inspector, educator, and building failures researcher in Kingston, NY. Chlorine kills bacteria, including disease-causing organisms and the nuisance organism, iron bacteria. Platypus water filters such as the Cascade bag type water filter are produced by Cascade Designs, Inc., 4000 First Ave. This well-focused, up-to-date reference details the current medical uses of antiseptics and disinfectants -- particularly in the control of hospital-acquired infections -- presenting methods for evaluating products to obtain regulatory approval and examining chemical, physical, and microbiological properties as well as the toxicology of the most widely used commercial chemicals.
Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. This ability of HVAC UV lights to kill mold and bacteria translates into healthier air for you and your household.


To reap the benefits of UV lights in your HVAC system, your unit has to have a certain type of UV light installed in it to clean flowing air. A Tozzo Frios conta com uma vasta gama de produtos como: frios, laticA­nios, embutidos, enlatados, congelados e produtos a granel. In homes, UV germicidal irradiation systems can target upper-room air, HVAC ductwork or cooling coils and drain pans. Upper-room air UV systems have the advantage of targeting air once it has already reached your living spaces. UV light improves air quality by targeting the genetic material of microbes that can inhabit indoor air. UV lights can be a great tool to improve indoor air quality, but they shouldn’t be the only tool you use. A UV lamp is a lamp specifically designed to emit light at the ultraviolet wavelength, which is generally not able to be seen by humans without special equipment.
In addition to these entertainment and cosmetic applications, a UV lamp can also be used as a treatment tool for a number of different illnesses. I have a very old copy of The Womanly Art of Breastfeeding, and it suggests that for sore nipples, you should either expose them to sunlight or (I think) use a UV lamp.
I’ve never understood people who go to tanning salons to sit under these lamps and get their tans.
The SteriPEN is a compact, lightweight, battery-operated devise that purifies water by emitting Ultra-Violet (UV) light. Using UV light to sterilize water is nothing new: there is a low-tech way called the SODIS method that uses the suns rays to do the same thing. The UV light in a SteriPEN will kill just about every biological contaminate that infects water. Description: The Journey is the top of the line SteriPEN for disinfecting water in the outdoors. Description: This simple and ultralight purifier provides safe drinking water with a minimum of fuss. Description: Enjoy the Freedom to go anywhere with SteriPEN’s smallest,lightest and first rechargeable UV water purifier.
Description: This is a hand-powered, battery and chemical-free ultraviolet water purification system. The SteriPEN gives users the ability to sterilize their drinking water at the touch of a button.
The good news is that there are types of water filters and water filtration systems that can treat water containing various microbes including bacteria, Giardia, and Cryptosporidium cysts, as we discuss just below.
Examples of portable ceramic water filters include the Katadyn® ceramic water filter, Hiker Pro Micro Filter (also from Katadyn), and ExsStream ceramic water filter. Some portable water filters include a container into which water is poured, then pumped out.
The latter, ceramics, can be expected to have a longer use-life and can be cleaned and restored in the field.
The filter used includes an activated carbon core that can remove some tastes and odors from water as well. One filter is rated for up to 750 liters of water (250 gallons), or less, depending on the clarity of the starting water being filtered. Plastic tubing (a hose float), scrubbing pad, and storage sack are provided by the producer. The hand pump draws water out of the container, through the filter, and then delivers it out of a spout or tube into a clean container for drinking or other uses. Small and larger capacity portable ceramic water filters are available from many sources including camping equipment suppliers and water treatment equipment suppliers such as Crystal Clear Supply. A standalone charcoal filter for portable temporary water purification risks becoming contaminated with bacteria. If the emergency water supply is cloudy, visibly muddy or dirty with sediment, filtering the water through any filter that happens to be on hand will reduce the debris in the water and improve the ability of the next water disinfection step to operate more quickly and reliably.
This product filters particles down to 0.2 microns, small enough to remove nearly all bacteria and protozoa that may contaminate a water supply. Platypus points out that the Cleanstream water filter system is not suitable for use in freezing conditions. If, however, the building has water pressure, a RO system will work just fine since normally these systems use only water pressure to operate the filter system.
Even in this case, if the building water piping downstream from the RO system has been flooded it will be unsanitary and is likely to need disinfection before water taken through that piping can safely be consumed. Take a look at the water treatment effectiveness discussion where COLLOIDAL SILVER for WATER DISINFECTION is used.
The SteriPen weighs 5.7 oz, and as you can see even in our package photo, it is quite compact. If ultra violet light is not of sufficient capacity to treat water flowing past its bulb it will not be effective.
UV lights for drinking water treatment are installed in some properties as a means to kill bacteria in a water supply. Cramer is a past president of ASHI, the American Society of Home Inspectors and is a Florida home inspector and home inspection educator. However, low levels of chlorine, normally used to disinfect water, are not an effective treatment for giardia cysts.
It deals comprehensively and authoritatively with its subject with contributions from 31 distinguished specialists.
Some modern HVAC units now have UV lights built into them to help kill mold and other bacteria. In fact, some researchers have even studied the germicidal application of UV light specifically in commercial HVAC units. The disinfecting properties of the light means fewer colds and flus for your family, as your HVAC system will no longer be recirculating those virus-causing germs.
For an HVAC consultation on how to improve the air quality your family breathes, give us a call at 813-602-7110. Venha conhecer nossa loja pessoalmente ou acesse a pA?gina de produtos e confira alguns dos nossos itens. Studies have found that ultraviolet lights are one way to reduce the impact of indoor air contaminants.
Hospitals sometimes use UV light to keep their environments microbe-free, and UV light can also be used to treat water. The moisture found on HVAC coils and drain pans can attract microbes such as mold, bacteria or fungi, which love warm, damp environments.


These systems direct their UV light into the upper parts of a room, decontaminating the air as it circulates without exposing occupants to direct UV light exposure. The light breaks down the DNA and RNA in these microbes, causing them to break apart entirely or simply become harmless. Proper ventilation, cleaning, maintenance and moisture control should also be part of your efforts to ensure that your indoor air is as healthy as possible. As a result, opening windows and doors whenever possible can help to ventilate your home and refresh your indoor air.
Sweeping and mopping floors, vacuuming carpets and washing bedding are all important steps to take regularly. Please contact us if you would like to speak with an expert about indoor air quality management. In terrariums, these lamps are used so that plants and animals, especially reptiles, get enough of the required UV light they may need each day. At amusement parks and other places, an ultraviolet lamp can be used as a black light to create unusual glowing effects.
Many tanning beds use such lamps to give artificial tans because UV light is what actually tans the skin in the natural environment.
While most UV light therapeutic tools are considered alternative forms of medicine, the use of an ultraviolet lamp, or lamps, to treat seasonal affective disorder, a mental illness, has been accepted in many mainstream practices. Apparently the UV rays help cracked nipples heal! I doubt you would find a lot of doctors recommending that these days! Even without knowledge of the science behind it, I’ve always felt that there was something that was inherently dangerous about the whole thing. There are about a half-dozen models to choose from, but all of them kill 99.9% of all bacteria, viruses and protozoa that is present in the water. The patent-pending technology ensures safe use and provides purification in even the coldest of waters. The units are lightweight, durable, easy to use, and much more convenient than lugging around a large supply of water. The company also produces a higher capacity Sawyer Complete Water Filter system that can produce 2L of water in as little as 1.5 minutes. The microbes covered by this description include Cryptosporidium, viruses, bacteria, and Giardia, and also E.
Therefore it is important to follow the manufacturer's instructions when using the SteriPen UV light portable device.
Provides an historical overview, descriptions of the types of antimicrobial agents, factors affecting efficacy, evaluation methods, and types of resistance. Another researcher successfully managed to treat tuberculosis in the early 1900s with the same method, and the practice of disinfection with UV light became mainstream in the mid-20th century.
One study from the journal of Applied and Environmental Microbiology found that, after four months of UV light treatment, the fungal levels in a commercial air-handling unit were significantly lower than those of the control unit. You’ll also notice fewer odors coming from your unit, making the air you breathe fresher as well as healthier. Additionally, exposure to UV lights over time can destroy the plastic materials in your unit. Germicidal UV lamps are sometimes found in food processing plants to help protect food from contamination.
Mold can also grow in ducts over time, particularly areas subject to moisture from evaporation.
Airborne pathogens that are vulnerable to UV light include bacteria, viruses, mildew, mold, fungi and spores. High quality air filters and frequent filter changes can also make a big difference to air quality. Use door mats, or remove shoes at the door to avoid tracking in dirt and other contaminants from outdoors. For example, it is possible it will also produce visible light, but it can also operate using a black light. These effects can also help reflect very vibrant colors, which have glowing phosphors that often react with invisible UV light. However, the tanning beds can offer UV light at a much higher concentration, thus quickening the time it takes to receive the desired tan level. The theory behind the treatment for the seasonal disorder is that humans also need a certain amount of UV light and that may not be available in sufficient quantities during the winter months when people tend to spend less time outdoors and the days are shorter. In order to get a tan, and then to maintain it, you have to go anywhere from once a week to a few times a week. A gravity operated ceramic water filter would be an effective means of sanitizing water from a rooftop water cistern. Find out if an HVAC UV lights are right for your Tampa home by reviewing the following pros and cons. And significantly enough for Tampa residents, UV lights are especially effective in humid climates like Florida’s.
The danger is especially potent for those who use tanning beds, according to the American Medical Association, which states that the beds do increase the risk for cancer.
Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. I told her maybe she should just learn to look at the world without ultraviolet light, but she is obsessive compulsive in her cleaning habits, kind of like Felix in the Odd Couple. You have to have more than one way to do stuff, especially something as important as sterilizing your drinking water. I feel that no matter what model of the SteriPEN you happen to choose, it will be an important addition to your First Aid  and Emergency Kits. I think if you need a tan, our sun is a better source of energy for that, but even there you need to be careful and use the right kind of skin protection. The text is intended as a reference guide to help building owners operate and maintain their home effectively.
Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order.
Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order.



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