Pelican Water Systems
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3 easy steps to determine the right UV for your home.

  1. Determine required dosage
  2. Determine the flow rate you need based on the number of bathrooms in your home
  3. Choose the UV System that is right for you


Select Your Water Source:

  • City/Municipal Water: 95% UVT
  • Well Water: 85% UVT
  • Surface Water (lakes, streams, ponds, springs): 75% UVT

What is UVT and why is this important?

UVT is a measure of how well the water is able to transmit UV light or Ultra Violet Transmittance.  The quality of the water affects the intensity of UV light that is able to transmit through it.  It is important to know your UVT when purchasing a UV Disinfection system as it will affect the dosage your UV system is capable of producing.  Note:  The Water Source list above determines your UVT based on your water supply.
High UVT
Low UVT

How to determine the proper dosage?

Dosage is defined as the intensity of UV light that is able to penetrate each liter of water measured in Millijoules per liter or m/J that passes through the UV chamber

The dosage required for proper disinfection is determined by the UVT of your water supply.

  • 16 m/J - This is standard UV disinfection and is acceptable for city water.
  • 30 m/J - This will provide UV disinfection for well water with unknown or high levels of bacterial content or where well water is known to contain high levels of bacteria.
  • 40 m/J - This is the EPA and NSF standard for dosage to remove all bacterial contamination on all water supplies including city, well and surface water.

*Note: If you have Hardness or Iron in your water, pretreatment is required for proper UV treatment.


Number of Bathrooms
in your home
Gallon Flow Rate
(per minute)
1
4
2
6
3
10
4
12
5
13.5
6
15


To achieve proper disinfection of your water, choosing the correct UV system is important. Based on your UVT, dosage requirements and water flow rate the chart below will determine which system is right for you. The chart below recommends UV systems that will kill 99.99% of all microorganisms (bacteria). We believe that it is important to recommend the very best when it comes to your water.

Which System type should you choose?

Non-Monitored Systems: This system is the most commonly used system for residential homes and in most cases is all a homeowner needs to disinfect their water.

Monitored Systems: If you run a business or a lab that needs to be able to monitor UV dosage in the water, or you just want that extra feature at home, you would choose these systems that give you the ability to monitor the water.

Non-Monitored Class B NSF Systems: If your local county or state requires that you purchase a NSF Certified UV System, than you must choose a UV system that will produce 16m/J dosage. All Trojan UV Max Validated models are NSF Certified and produce a 16 m/J dosage. Use the chart below to choose the Validated model based on your flow rate.

Monitored Class A NSF Systems: If your local county or state requires that you purchase a NSF Certified UV System, than you must choose a UV system that will produce 40m/J dosage. All Trojan UV Max Pro models are NSF Certified and produce a 40 m/J dosage. Use the chart below to choose the Pro model based on your flow rate.

99.99% Disinfection Requirement
Your Flow Rates (gallons per minute)
UVT Required
Dosage
4
6
10
12
13.5
15
Non-Monitored Systems - Trojan UV Max
City Water
>95%
16 m/J
Well Water
>85%
30 m/J
Surface Water
>75%
40 m/J
Monitored Systems - Trojan UV Max+
City Water
>95%
16 m/J
Well Water
>85%
30 m/J
Surface Water
>75%
40 m/J
Non-Monitored Class B NSF Certified Systems - Trojan UV Validated
City Water
75% - 100%
16 m/J
Monitored Class A NSF Certified Systems - Trojan UV Pro
All Sources
75% - 100%
40 m/J

Note: If your local county or state requires that you purchase a NSF Certified UV System, than you must choose a UV system that will produce 40m/J dosage. All Trojan UV Max Pro models are NSF Certified and produce a 40 m/J dosage. Use the above chart to choose the Pro model based on your flow rate.

If you have any questions what system is right for you after looking at this chart, please call us and we will be able to help you determine the right UV for you. 1-877-842-1635