FAQ

We work in a progressive technology field where things change day by day. Below we have gathered some information on safe water we hope might interest you.

The company was founded in 2013 in Lund, Sweden making it the earliest entrant into the UVC LED water disinfection market. Proof of concept was patented in 2013, with prototypes developed one year later and production of commercial solutions were up and running in 2015. The Generation II product was launched and CE certified in 2018. The Purify Flex is built on a new pending patent launched in 2019. Purify Mini and Purify Solo were launched in 2021 to meet demand for smaller flow point of use (POU) applications.

The founders, Dr Kenneth M Persson, Professor in Water Resources Engineering, Mr Ola Hansson, MSc, Dr Lars Montelius, Professor in Nanotechnology and Mr Tord Wingren, Tech Innovato, together with employees have >150 years of combined experience in key areas including water, healthcare, microbiology, nanotechnology and IT/telecom.

The company currently has solutions operational in Sweden, Norway, Spain, South Africa, Bangladesh, Pakistan, and Rwanda, and is ready for accelerated international expansion.

UVC-LEDs are solid state semiconductors used for a variety of applications, including disinfection and water monitoring. Light emitting diodes produce light when current flows through them. Depending on the band gap of the semiconductor, LEDs can produce photons at various wavelengths, including ultraviolet, visible, and infrared. Extensive research and development in the last decade has resulted in improved lifetimes and optical outputs, along with cost reductions.

UVC-LEDs have a number of additive benefits over conventional UV lamps. They do not contain mercury making them much safer to utilize, especially in applications where a mercury spill could lead to catastrophic consequences (e.g. medical applications). In addition, the small size of the semiconductors allows for a lot more design freedom to embed and integrate UV disinfection directly at the point of consumption (taps, faucets) or exposure (e.g. showers). Other benefits include an instant-on capability allowing for energy savings for intermittent applications.

Watersprint offers three product platforms – Purify Solo, Purify Mini and Purify Flex. Each platform has been carefully optimized for a range of target applications and associated water quality conditions.

  • Purify Solo has been designed primarily for integration into OEM applications such as water dispensers, and industrial and life science applications.
  • Purify Mini is a low flow product line designed for point of use (POU) drinking water applications. One of its unique features is the ability to open the disinfection reactor and access the optical system. This allows the user to access, maintain, and replace key components that are important for maintaining disinfection efficiency and enhances the overall sustainability of the product line.
  • Purify Flex is the original product platform introduced by the company in 2013. It targets higher flow rates in the Point of Use (POU) range and is built with materials of equivalent quality as high end plumbing products. One of the key target applications for this system is Legionella control in hospitals, sports centers, schools and apartment buildings.

All three platforms feature a unique combination of architecture, materials, mechanics, fluid dynamics and intelligent software that balance affordability and features required for each target segment. Please see the product data sheet for more details on the specifications for each product line.

Watersprint systems have been designed to provide a high level of disinfection under a range of flow rates and water quality conditions. The systems have been extensively third party tested under a range of conditions providing greater assurance that it will perform in mission critical applications. Please see the product data sheet for more information on the inactivation level achieved under these conditions. Watersprint experts can assist you in selecting the optimal system for your application.

You do not always need to install a filter immediately prior to the system as UV system performance is very dependant upon incoming water quality.  In many cases, UVC LED systems are installed for secondary disinfection (e.g. Legionella) in already treated municipal water.   In this situation, an upstream filter is unlikely to be required.   Please  see the product data sheet for each product line to determine the recommended influent water qualities (e.g. incoming turbidity and UV transmittance).  If your application does not meet the minimum requirements, you may need to install a filter upstream of the unit.  Watersprint experts can assist you in determining whether filtration is required.

This is a question that has been contemplated since the formation of Watersprint in 2013! Watersprint is the most capable supplier in terms of understanding “Internet of Things” IOT enablement. Watersprint units add operational intelligence to existing solutions and applications, real time monitoring with alarm, maintenance and statistics online and alarms via SMS and e-mail.

The most simple and effective way to determine if a unit is working is a visual status LED on the unit. The visual status LED indicates when disinfection is active, providing reassurance to the user that the water has been disinfected. In addition to this feature, optional external LED status signals and flow sensors can be utilized for more comprehensive UV dose monitoring strategies. Watersprint experts can assist you in choosing the right solution in this area.

Watersprint engineers and scientists have been working since 2013 to carefully select materials and design robust systems that meet our target users expectations for product longevity. We quickly learned that expectations vary according to applications and segments. As a result, our products offer a range of UVC LED lifetimes optimized for the needs of users in key target segments. UVC LED life spans range from 5000 to 15,000 operating hours depending upon the product platform. A key distinction that must be considered when examining lifespan is that we are quoting actual operating hours. UVC LED systems may be operated on an intermittent basis. Please see the product data sheet for each product line for additional information on this topic.

Power consumption varies by product line and operating conditions. Please see the product data sheet for additional information on power consumption for each of the product platforms. When equipped with a flow sensor, Watersprint units may be operated on an intermittent, on-demand basis which significantly reduces power consumption compared to conventional mercury lamp based units which cannot be operated on an intermittent basis.

Watersprint products are designed to be relatively maintenance free. They use state-of-the-art UV-LEDs, meaning there are no mercury bulbs to replace.

The Purify Mini has a unique feature compared to similar UVC LED systems. This is the ability to open the disinfection reactor and access the optical system. This allows the user to access, maintain, and replace key components that are important for maintaining disinfection efficiency. A visual status LED will provide a signal to the user to indicate when it is time to exchange these components. The components including the simple tools that are required to exchange them are available as a kit from Watersprint.

If you want to become a Watersprint reseller, please write us an email at info@watersprint.com with full contact details, a brief introduction of your company and ideas, we will get back to you within 48 hours (working days). Or fill out the form at our website.

The reseller shall have appropriate facilities, knowledge, and ability to sell such Products in a defined area/territory.

Watersprint stands for Swedish Quality, we use only high-quality spare parts carefully picked by our experienced engineers. Our LEDs are tested and validated to run between 5-15 000 hours depending on the model and application. 

The product warranty is valid for a period of 12 months from the delivery of the Products to our resellers and partners. If you are an end customer, please contact your local reseller/dealer. 

At a malfunction of the Products, Watersprint shall, in its sole discretion, within a reasonable time either repair or replace the malfunctioning Product with an equal Product available.

The Products are intended to be installed on visually clear water (not colored, cloudy, or turbid). Therefore, the water must meet the following requirements for the Products to function correctly:

  • Watercolor (pt-co) unit < 10 mg/l Pt
  • UV-transmittance at 10 mm >90% measured at a 254 nm wavelength 
  • Turbidity <0,3 NTU, (measures the amount of particles in the water)

Depending on the bacteria concentration in the incoming water and the flow of water through the unit, the reduction of bacteria can be >99%.

For further information please see Watersprint General Terms & conditions. 

To register a warranty claim, please follow the steps below (applies to our resellers/dealer):

  1. Contact us via claims@watersprint.com , please enter your order number and product description for the product that needs warranty repair/replacement. 
  2. When we have responded to your claim you will be asked to send the product back to us to confirm that it qualifies for warranty.  Once we have confirmed we´ll get your repair/replacement sent out. 

In general, we recommend installing the filter upstream from the UVC-purifier, to remove particles that can be in your water that will affect the disinfection. However, if you’re using a GAC-filter (Granulated Activated Coal) there is a risk that the first-time use after installing a new GAC-filter, it will release some coal dust. This dust could potentially soil the interior of the UVC-reactor and impair the disinfection process. Therefore GAC-filters are recommended to be rinsed before installation, or installed downstream from the UVC-purifier.

For the Purify Flex-family, the integrated flow sensor is located at the inlet of the UVC-reactor. 

For the Purify Mini-family, the integrated flow sensor is located at the outlet of the UVC-reactor.

For the Purify Solo-family, the flow sensor is external, and as a default placed after the outlet from the UVC-reactor, but it could also be placed before the inlet, or some other place on the same water pipe (limited only by the length of the cable). It doesn’t affect the functionality. Why? Because if you have a water pipe including a UVC-LED purifier and a flow switch, the body of water will move as one, provided that there is no air in the system. Meaning that when the water starts flowing from the faucet, all water upstream will also be in motion at the same time.

In our product information and product datasheets you can find more detailed information on this. Our general maximum water temperature is 45° C, while active, but it varies on some products.

If you exceed this maximum water temperature, the life span of the UVC-LEDs will be shortened. How much depends on how high the temperature is, and how long exposure time the active UVC-LED will have in that temperature. 

Purify Flex, Purify Mini and Purify Solo FS (with Flow Switch) have status LEDs showing a green light when the purifier is powered, and showing a blue light when the purification is active.

For Purify Solo there is no status LED, since it is for integration, instead there is an electrical status signal that can be connected to an external status LED, or the control system for your specific application, get in touch if you have any questions regarding this: Ask more! 

Electrical status signal is also available in Purify Flex and Purify Mini.

Purify Flex and Purify Mini will show a red light from the status LED if there is an error. Another way to discover a failure is if the green and blue light don’t display as they should, this is valid also for Purify Solo FS. 

Purify Solo is designed for integration and will send an electrical status signal that indicates if there is an error, provided that it is connected to an external indicator LED or a device that measures the signal.

Yes, but be aware, a lower UVT (ultraviolet transmittance) will decrease the disinfection rate, also, before you implement your purifier in a system with other fluids than water, get in touch with us so that we can help you investigate the compatibility between your fluid and the materials in the UVC-purifier.

Yes, some heat will be transferred, but it will not noticeably heat the water. In flowing water, we have not seen a temperature increase above 0,1° C.

The materials in contact with water have been carefully chosen to fulfill all necessary requirements for food contact. To find out more, have a look at our product information.

Two of the conductors are for powering the purifier, the other two are for the electrical status signal.

Two of the conductors are for powering the purifier, two of them is to activate the UVC-LEDs if the purifier is integrated in a system where it is activated by an external signal instead of the integrated Flow Sensor, and the fifth is enabling the possibility to add an external visual status LED in case the purifier is installed so that it is not visible.

It varies between different products. Please have a look at our product information.

This is stated in our product information, but is also depending on your water quality and potential concentration of pathogens in your water. 

To be able to recommend the correct product for your application, we would recommend to run a water analysis to see the quality of your water and concentration of pathogens. Then describe your intended use to your reseller to find the right fit.

This information can be found in our product information

We have the information of what UV-dose we achieve at a specific flow rate for Purify Solo in the data sheet. For further information please contact us: Ask more! 

For Purify Flex and Purify Mini we instead state an achieved bacterial reduction (Log. reduction) at a specific flow rate. For further information please contact us: Ask more!

In short, a Log. reduction of 1 means that 90% of the microorganisms have been deactivated.

A Log. reduction of 2 means that 99% of the microorganisms have been deactivated.

A Log. reduction of 3 means that 99,9% of the microorganisms have been deactivated.

And so on…

The Log. reduction unlike UV-dose needs to be stated for a specific microorganism at a specific flow rate. While the UV-dose is stated only at a specific flow rate. They both are dependent on UVT (ultraviolet transmittance), and this is usually stated at 98%, meaning that for every cm of water, 2% of the light is blocked by the water.

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