Frequently Asked Questions


What is Ultraviolet?

UV does not kill microorganisms like chlorine does, but instead UV inactivates them. UV light at a specific wavelength of 254 nm (nanometers) is absorbed by the genetic material of the microorganisms at the DNA strand which codes for reproduction. The microorganism cannot reproduce, cannot make colonies and therefore cannot infect when consumed. In other words, the microorganisms have been sterilized or neutered and die off.

How is Ultraviolet strength measured?

The UV exposure, at 254 nm, is measured in water treatment as mJ/cm2 (millijoule per square centimeter) or “milliJoules”. All Noah products provide a minimum UV Dosage of 20 mJ/cm2.

Is the UV light exposed directly to the water?

Yes. The UV light is in the center of the filter; therefore, is exposed directly to the water. The best way to penetrate water with the UV light is to expose outward radiants into the water.

What is the Quartz Sleeve?

The Quartz Sleeve serves three purposes.: 1. To isolate the lamp from the water so the electrical contacts are not shorted out by the water; 2. To create a thermal barrier allowing the lamp to maintain its ideal operating temperature of 104 Degrees Fahrenheit; and, 3. To allow maximum transmission of the UV energy into the water. The Quartz Sleeve is made of pure-fused Quartz which has a transmission rate of approximately 98 percent.

How is a Quartz Sleeve Cleaned?

The Quartz Sleeve should be wiped down with a damp cloth each time the filter is changed. There is no need to remove the Quartz Sleeve for this cleaning process. If there are any scale or hard water deposits on the Quartz Sleeve, they can be removed by using a vinegar solution or a weak acid solution.

How long does a UV lamp operate?

The UV light used by Noah is designed to operate for 9,200 hours (equivalent to 24/7 operation for 380 calendar days). The lamp will slowly lose energy at this point and should be changed to guarantee the amount of UV energy available is sufficient enough to kill any micro-organisms.

Does UV purification alone make the water taste better?

No. The UV energy entering into the water has no effect on the taste and odor of the water with the exception that certain chemicals will oxidize under the UV light. The taste may change due to this oxidization. This oxidization only takes place when the water is standing for a long period of time in front of the UV lamp.

Should UV be used with other forms of filtration?

Yes. Because UV does not change the quality of the water other than killing the bacteria, it is always recommended to have an additional Carbon or Sediment Filter with a UV system. All Noah systems have these filter systems built in with the Ultraviolet light.

When used with other filters, where should the UV be placed?

It is always recommended that the Ultraviolet system be the last water treatment device before point-of-use. Any filter or other water treatment device may cause re- contamination.

What causes the black particles to appear in the water when using a carbon filter?

The black particles that appear in the water are from the Carbon filter. During transit, Carbon filters generally give off small amounts of Carbon particles. These particles will be flushed out during the initial use of the system.

Is Ultraviolet as harmful as Radiation?

No. The UV light only penetrates the water and is very much like sunlight. There is no residue or residual of any kind in the water that has been treated with the Ultraviolet light. All Noah systems are designed so that no exposure to the UV light is possible. Always use caution when servicing a UV system so you are not exposed directly to the UV light.

May I run hot water through my system?

Noah does not recommend using hot water or water greater than 100 Degrees Fahrenheit through the UV system. At higher temperatures, the plastics may soften, distort, or weaken; therefore, defecting the system.

If the UV lamp is darkened, is it defective?

No. Darkening at the ends of the UV lamp is normal. The UV lamps rarely fail, and failure is usually caused by a too low or too high voltage. It is extremely important that the lamp be changed each year.

What is the difference between hard and soft glass UV lamps?

Noah systems exclusively use hard glass for lamp and Quartz Sleeve. Hard glass is pure-fused Quartz and maintains its ability to transmit UV light over a longer period of time. Soft glass lamps use a glass more like normal window glass, and the UV light causes this glass to solarize and inhibits the transmission of UV light. Normally, soft glass lamps do not last more than three (3) months. Hard glass lamps are designed to operate for at least one (1) year.

Why is Teflon used with the EPCB Filter?

Teflon is used in the EPCB Filter to allow a double pass, or extended pass, of the water along the UV lamp. Very few materials are transparent to the UV light. Pure- fused Quartz and Teflon allow transmission of UV light. This is a patented application of the Teflon Sleeve within the filter. The letters EPCB stand for Extended Pass Carbon Block.

Can I use non-Noah filters?

No. The filters used in our systems have been tested extensively for use with Ultraviolet light. Filters that are not supplied by Noah cannot be guaranteed to provide the proper pre-treatment necessary for the UV process to be effective. Noah cannot guarantee the UV kill rate or the effectiveness of the system with 3rd-party filters. The use of non-Noah filters will void any warranties on the system.

How long do filters last?

The useful life of the filters is completely predicated upon the condition of the source water.  Dirt, sediment and other particulates will determine how long the filters last and given the unique nature of every water source it’s not possible to make any accurate predictions. Every application will vary.

Do ordinary filters kill bacteria?

No. Ordinary filters cannot kill bacteria. The bacteria will enter the filter and either pass through the filter or grow within the filter. Noah’s UV system is always the very last pass after the Carbon filter to ensure that bacteria does not pass through to the drinking water.

How much amperage does your Trekker model need for operation?

The Trekker unit has an amperage draw of 3.32 amps at 12-volts during operation.


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