Home and Garden, Services

Know about the functions of the ultraviolet water filtration

Ultraviolet water filtration is the process that offers one of the most cost-effective ways to purify water, thereby protecting drinking water against biological contaminants. Ultraviolet or UV protect against water-borne viruses, bacteria, molds, and other pathogenic diseases. Viruses such as hepatitis virus that is known to be highly resistant to chlorine treatment can be relatively eliminated through UV treatment.

Let us have a look at how UV water filtration works

  • Invisible Ultraviolet light is emitted from a UV light source that has an output of roughly 254 nanometers, producing radiation that has a significantly greater density than the radiation in the sunlight.
  • The flow chamber contains the light source through which water passes. This exposes the water to the UV light. The light source used in such water filtration system is usually a mercury vapor lamp, also called as the germicidal lamp.
  • An electric arc present in the filtration system vaporizes the mercury present in the lamp. The mercury present inside the lamp vaporizes, thus producing UV rays of short wavelength.
  • These lamps are made out of special quartz glass that permits short UV rays of around 2530 A (Armstrong unit). The wavelength of such short magnitude is achieved due to the low pressure inside the lamp.
  • Before purifying the water through UV filtration system, the water is passed through a separate filter to remove any turbidity present in the water. This is because clear water allows better penetration of UV light. Most water filtration systems use a filter of 5-micron before passing it through the mercury vapor lamp.

Pros and cons of using UV water filtration systems

  • The primary advantage of using a UV filtration system is that it is cost-effective and kills a majority of harmful microbes that cause water-borne illnesses.
  • These water filtration system starts at just about $250 if you intend to use it as a localized filtration system. Whole house water filtration system costs around $1500.
  • UV water filtration system doesn’t consume much electricity and requires as low as 100 watts of power to function.
  • Easy to install and maintain, these water purifiers do not damage the septic tanks or plumbing of the household.


  • Even if these water purifiers consume less power, they still require some amount of electricity. Hence these water purifiers cannot work in the event of power outage.
  • UV rays cannot be seen by the naked eye because of their short wavelength, hence it is hard to determine if the UV apparatus in the purifier is still working. Thus, it becomes necessary to change the filters twice every year.


Home and Garden, Services

Factors for choosing the best water filtration system

Installing a water filtration system at home provides you an easy way to get purified water, without getting into the hassle of buying bottled water. The question arises, which water filtration is the best for your home or office space? Following steps will help you to find the best water filtration system that suits your needs.

Contents of the supplied water
Before choosing the best water filtration system, you need to know what contaminants are present in the water that is being supplied at your home or office. You can do this by getting a copy of water quality report from your provider. This will help you narrow down your choice of water filtration system.

Common methods of water filtration
You can pick from most basic to the most advanced water filters. Following are some categories of water filters:

  • Pitchers
    The most basic form of water filtration system, pitchers use gravity to move water through the filter. This type of water filters requires no setup, allowing you to refill the pitcher as you drink and use the water.
  • Undersink
    This type of water filter system is installed under the sink and has a smaller faucet for supplying purified water. These filters treat water at the point of consumption.
  • Whole-house
    This category for water filtration system treats water from the point of entry in the home or office spaces. The filtered and treated water flows throughout the entire premise instead of a single sink or faucet.

The technology used in water filtration system
The most common methods include:

  • Reverse osmosis
    This type of water filtration system reverses the natural flow of water by passing the water through a semipermeable membrane. The drawback of this filtration system is it wastes water.
  • Carbon filter
    This technology uses activated carbon and is usually found in pour-through types such as water pitchers. Some brands also use this technology for under sink water systems.
  • Distillation
    This process heats the water to the boiling point and collects the steam to condense it, leaving the contaminants behind.

Costs and customer reviews
The prices between the type of water filters vary greatly as they are based on the brand and type of technology used in the water filtration system. Choose the one that suits your budget and purpose. Read the customer reviews of several water filter systems available on the internet as they will help you narrow down your choices further.