Harness the power of light with ultraviolet technology. In this section, access guides and manuals to answer the technical questions you may have about ultraviolet water purification systems, as well as maintenance and installation instructions.


Ultraviolet water purification is an excellent method for ensure your water is safe and drinkable. Like all water treatment systems, a UV system needs routine maintenance. The good news is, UV system maintenance is relatively simple and trouble free. Below are some areas that need periodic attention to ensure optimal performance.

Manufacturer’s Instructions and Information – Keep and Reference It!

Smiling Woman drinking water from glass

While most UV systems share many similarities, there are often some differences in maintaining a particular system. Specific information from a system’s manufacturer will be critical to maintain your system from year to year. Always closely follow the manufacturer’s maintenance schedule and instructions to avoid compromising the system. Proper maintenance will ensure your system’s effectiveness for years to come.

UV Lamp (or Bulb) Replacement – Change Every Year!

Image of a UV Lamp

A UV Lamp is the heart of the UV treatment system. The lamp needs to operate well to ensure water is safe. Unlike regular light bulbs, UV Lamps do not burn out – they solarize. This means that over time they reduce in their light wave intensity to about 60% of what a new UV lamp provides. This point is reached usually after one year, or 9000 hours, of continuous use. It is EXTREMELY IMPORTANT to replace the lamp every year on schedule. New lamps will generate a UV light dosage of near 60 mJ/cm2. Over a year’s period the UV light dosage will drop to about 30 mJ/cm2. This is the minimum dosage needed to effectively kill bacteria. At this point, lamps should be replaced. Almost all UV systems are meant to operate continuously, you can actually significantly shorten the life of the bulb by turning it on and off.

See how to replace a UV Lamp

Looking for a UV lamp? Click Here

UV Sleeve Cleaning & Replacement – Change Every Two Years

Image of a UV Quartz Sleeve

Water running through a UV system often carries minerals, sediment, and other debris. These contaminants will eventually build up on the UV quartz sleeve that protects the UV lamp. This build up will cloud the sleeve and inhibit the UV light from penetrating the water – allowing microorganisms to pass by without being killed. In order keep the quartz sleeve clean and operating well, the glass must be cleaned regularly – at least yearly when the lamp is changed. However, cleaning may need to occur more often depending on water quality. It is recommended that the sleeve be replaced periodically, typically every 2-3 years.

See UV sleeve cleaning tips

Looking for a UV sleeve? Click Here

Pre-filtration Monitoring and Periodic Changes – Remember to Check!

If you choose UV, be aware that it’s highly possible that a separate prefilter (and even a water softener) may be needed in addition to the ultraviolet system. A prefilter will protect the UV unit and ensure that it functions properly. Be careful to properly maintain any prefiltration systems (such as sediment filters, carbon filters, water softener, and other systems) and regularly confirm they are working as expected. This will include periodic changing of filters and the addition of chemicals or other solutions, as needed.

Monitoring Water Supply and UV System Performance – Make Sure It’s Clean!

Water chemistry and contaminants can change over time even from the same water source or well. Because of this, water should be tested for bacteria counts every six (6) months (recommended) or at least yearly. When test samples are taken, water should be sampled before and after the UV unit to test its performance. Water should also be sampled in areas where animals have contact with water fixtures as bacteria regrowth can occur downstream of the UV unit in these areas.

Monitoring UV Light Dosage – Make Sure It’s Working!

Many UV systems are equipped with light intensity meters or sensors that indicate the penetration of UV light through the glass sleeve and the water. These sensors provide a warning signal when the UV dose is too low to provide adequate disinfection and indicate when it is time to clean the quartz sleeve and/or replace the UV lamp. If a UV system does not have a sensor, it is best to follow the manufacturer’s recommendation for cleaning and replacement – usually every one (1) year for the lamp replacement and sleeve cleaning; every two (2) years for sleeve replacement.

Looking for a UV lamp and sleeve? Click Here

Top ↑