uv-buyers-guide.png

THINGS TO CONSIDER WHEN BUYING A UV SYSTEM

There are a number of things to consider before purchasing a UV system. Take time to educate yourself about ultraviolet water purification to make sure UV technology is the right solution for your water treatment needs.

 

Old man holding a glass of clean water

Know How Much Water You Use - Knowing how much water you typically need during peak usage is important in selecting the right UV system. In order to provide peace of mind during boil water alerts and protect your home daily from microbiological contamination, getting the right size UV system is important.

Flow Rates - UV systems measure water flow rates in “gallons per minute” or GPM. All UV systems have a GPM rating that lets you know how much water can flow through the system. It is always better to oversize a UV system as water may not be effectively treated if undersized. Below are general flow rate guidelines for a residential UV system:

1 Bathroom: 6 gallons per minute flow rate
2 Bathrooms: 9 gallons per minute flow rate
3 Bathrooms: 12 gallons per minute flow rate
4 Bathrooms: 15 gallons per minute flow rate
5 Bathrooms: 18 gallons per minute flow rate

Flow rates for commercial applications are determined with a variety of other factors. Please contact us for more information.

Woman splashing water in her face

UV Dose - The amount of UV energy from the lamp to the water as it flows through the system is the “UV dose” expressed as millijoule per square centimeter or mJ/cm2. E. Coli, Giardia, and Cryptosporidium typically require a UV dose of 10 mJ/cm2 to become inactivated. ESP Water Products typically sells UV systems with flow rates of 30 mJ/cm2, which is sufficient for most residential applications. Flow rates for products with NSF Class “A” certification are rated at 40 mJ/cm2. NSF Class “A” certified systems are typically only used for specific commercial applications.

Quality of Water Before the UV System - To keep a UV system functioning at peak performance, it’s important to know what contaminants are in your water. For example, high levels of hardness, iron, and sediment may not allow the UV system to properly treat the water.

Incoming water to the UV system should meet the following parameters:

  • Hardness < 7 grains per gallon
  • Iron < 0.3 parts per million
  • Manganese < 0.05 parts per million
  • Turbidity < 1 NTU
  • Tannins < 0.1 parts per million
  • UV Transmittance > 75%

If your water does not meet these parameters before entering the UV system, then pre-treatment equipment may be necessary. If you have multiple filters or water treatment systems in place, the UV system is usually installed last in the lineup.

To understand what’s in your water and what contaminants need to be removed, you can request a copy of your city or county’s annual water quality report from your municipal water supplier. All municipal water suppliers in the U.S. that serve more than 25 customers must comply with federal Safe Water Drinking Act regulations, which require regular water quality testing and treatment, as well as making their reports accessible to the public.

If you’re on a private well, it’s especially important to know exactly what’s in your water. Private well water is not regulated by municipalities. It is therefore recommended that you find a lab that can provide a water analysis services including testing for E.Coli, bacteria, and the contaminants listed above.

Installation and Space Requirements - Some UV systems are long and some are more compact, even though they are rated at the same flow rates. One style is not more effective at treating water than the other, but more compact UV systems often use a brighter lamp and may be slightly more expensive. UV systems are typically installed vertically, but can also be installed horizontally. When determining the space needed for installing a UV system, make sure to allow at least double the size of the UV system dimensions so that there is plenty of room for replacing the lamp and sleeve. Also, consider the space needed for any pre-filtration systems.

Diagram of a Whole House size UV Water Purification system

Image courtesy of Viqua

Optional Features Available - Most UV systems come standard with an end-of-life countdown display indicating how many days remain until the lamp needs to be replaced. Other systems come with controllers that have LED lights indicating proper function of different system components. Some newer systems come with touch screen displays. However, UV systems can come with a variety of options and add-ons. The most common option added by homeowners is the sensor. Commercial applications are more likely to add a solenoid shutoff valve and flow meter. For more information on these options and UV system components, CLICK HERE.

Video courtesy of Viqua

Whole House 18 GPD UV Sterilizer

VIQUA VH410-F20
viqua-vh410-f20.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 18 GPM
  • Lamp Replacement Indicator
  • Compact Design for Easy Installation
  • Integrated Pre-Filter
  • Free Shipping
Retail $1,025.00
Sale $749.00

Whole House 12 GPD UV Sterilizer

VIQUA D4
viqua-d4.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 12 GPM
  • System Status LED Indicators
  • Compact Design to Fit Tight Spaces
  • Free Shipping
Retail $735.00
Sale $539.00

Whole House 10 GPD UV Sterilizer

VIQUA S8Q-PA
viqua-s8q-pa-no-banner.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 10 GPM
  • Lamp Replacement Indicator
  • Free Shipping
Retail $575.00
Sale $429.00

Well Water Treatment Considerations

If you’re on a private well, it’s important to know exactly what’s in your well water. Because private wells are not regulated by municipalities, contamination in the water can go undetected. That’s why having a sampling of your water tested by a lab is so important, and really the best way to understand what’s in your water. Be aware that constituents in well water can change over time. For example, well water can suddenly become contaminated after flooding, spring runoff or even simply a heavy rainstorm. If your well is older, there are also many ways that surface contamination could affect your drinking water.

Diagram of Possible Well Water Contamination Sources

Image courtesy of Viqua

Ultraviolet water purification is often used in well water applications because UV water purification systems can effectively protect against waterborne bacteria, viruses, and pathogenic disease-causing microorganisms.

We highly recommend you read this article on Well Water Contamination by Viqua.

Pretreatment Needs

Incoming water to the UV system should meet the following parameters:

  • Hardness < 7 gpg
  • Iron < 0.3 ppm
  • Manganese < 0.05 ppm
  • Turbidity < 1 NTU
  • Tannins < 0.1 ppm
  • UV Transmittance > 75%

If the water does not meet the above parameters, then pretreatment (a prefilter) and possibly a water softener may be necessary. Because well water often has a high level of organic matter and dissolved solids, a prefilter is used to prepare the water for the ultraviolet disinfection process. If a prefilter is not used and the turbidity level is high, the UV rays will be blocked by particles in the water making the UV treatment process less effective. Turbidity is the quantity of suspended solids in water which often causes cloudiness. While all UV Water Purification Systems will work for well water applications, many systems come with a prefilter or combination sediment and carbon prefilters to prepare the well water for UV treatment in an all in one system.

Video courtesy of Viqua

Whole House 18 GPD UV Sterilizer

VIQUA VH410-F20
viqua-vh410-f20.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 18 GPM
  • Lamp Replacement Indicator
  • Compact Design for Easy Installation
  • Integrated Pre-Filter
  • Free Shipping
Retail $1,025.00
Sale $749.00

Whole House 12 GPD UV Sterilizer

VIQUA D4
viqua-d4.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 12 GPM
  • System Status LED Indicators
  • Compact Design to Fit Tight Spaces
  • Free Shipping
Retail $735.00
Sale $539.00

Whole House 10 GPD UV Sterilizer

VIQUA S8Q-PA
viqua-s8q-pa-no-banner.jpg
  • Kills 99.9% of Giardia, Crypto, and E. Coli in Your Water
  • Flow Rates Up to 10 GPM
  • Lamp Replacement Indicator
  • Free Shipping
Retail $575.00
Sale $429.00

UV Systems with prefilter for Well Water Applications

All UV Systems

Rainwater Treatment Considerations

Rainwater being collected in a earthen pot from a spout

Rainwater harvesting is becoming increasingly popular. It’s a great way to lower utility bills and help the environment. But it’s important to understand that just because water came from the sky, doesn’t necessarily mean the water is clean or safe to drink.

First of all, rain barrels may collect more than water, such as animal excrement, leaves and dirt particles. Pollutants in the air may also affect the water quality. For example, carbon dioxide in the atmosphere can reduce the pH of rainwater, making the water aggressive on household fixtures or piping.

Just because water came from the sky doesn't mean it's clean and drinkable.

Water sitting in storage barrels is also susceptible to bacterial growth and exposure to the elements, not to mention the attraction for mosquitoes and other insects.

For these reasons, it is best to treat the collected rainwater prior to consumption. This way, you can best guard against becoming sick. Ultraviolet water purification system is an effective way to treat stored rainwater to guard against waterborne bacteria, viruses, and pathogenic disease-causing microorganisms such as Cryptosporidium and Giardia. In fact, viruses that are known for being highly resistant to chlorine (commonly used in municipal water treatment), such as the hepatitis virus, can be easily eliminated with ultraviolet treatment.

Why Choose Ultraviolet (UV) for Rainwater Treatment:

Six Reasons to choose UV light to treat Rainwater
  1. UV is environmentally friendly
  2. UV requires very little maintenance
  3. UV is a safe, natural process that uses no chemicals
  4. UV doesn’t affect the taste of water
  5. UV safeguards against waterborne bacteria and viruses
  6. UV systems can come with 12 volt option for use with solar power supplies

Considerations Before Purchasing UV for Rainwater Harvesting:

Turbidity is the quantity of suspended solids in water which often causes cloudiness, and should be a consideration when treating harvested rainwater. Water collected from roofs and gutters, may also contain leaves, roofing debris, and dirt particles. These suspended solids may require that a prefilter be installed prior to the ultraviolet purification process, as UV will not work effectively if turbidity has not been properly addressed.

Shop Ultraviolet Water Purification Systems

ESP Water Products has been in the drinking water industry for over 25 years – we know water and the products that make water great. We’ve identified the top UV system manufacturers, with the best quality products designed to meet all of your water treatment needs. The brands we sell on this website are industry leaders and we are confident these products will perform as expected, day in and day out, to protect you, your family, your business --and anywhere the systems are used.

We’re also proud to carry one of the largest inventories of premier brand UV replacement bulbs, lamps and components. Here are a few reasons you can shop with confidence at ESPWaterProducts.com:

  • 25+ years of experience in water filtration & purification means we understand water
  • We’ve researched the options out there to bring you the best
  • We’ll send bulb and lamp replacement reminder emails --to help maintain your system
  • We provide one of the largest online selections of UV systems and replacement lamps/sleeves.
  • We have competitive pricing on top-selling and premium-quality systems
  • We pride ourselves on excellent customer support

uv-cta-for-buyers-guide.jpg

Top ↑