Jacuzzi Hot Tubs and Sundance Spas have added factory-installed UV water purification to their 2012 hot tub models. The new water sanitizing system, dubbed CLEARRAY, uses ultraviolet light to kill microorganisms in spa water as they pass through a light chamber in the plumbing.

According to the company, “The CLEARRAY system instantly treats 99.9 percent of waterborne pathogens and does not introduce chemicals, gases or byproducts into the hot tub water. Lab tests have validated that water treated with CLEARRAY maintained the same cleanliness level while using up to 50 percent less sanitizing chemicals. Using less sanitizing chemicals translates to less skin and eye irritation for bathers from chlorine- or bromine-based products. The water purification system is available as a factory-installed feature on every Jacuzzi and Sundance Spas hot tub model." 

Tracine Marroquin, director of marketing at Jacuzzi Hot Tubs and Sundance Spas, added that “CLEARRAY water purification technology is a milestone in the hot tub industry. We’ve seen the application of UV-C technology in consumer products and in commercial use, but this introduction marks a breakthrough for our industry.”

The CLEARRAY system uses UV-C light, a natural part of the electromagnetic energy spectrum generated by the sun, to disinfect water. UV-C light effectively modifies the DNA of waterborne pathogens to stop their reproduction. UV-C light is a proven and reliable water disinfectant used in consumer products and commercial industries, such as industrial and municipal water treatment plants, medical facilities, food and beverage production and aquaculture. 

Scott Webb is Executive Editor of AQUA Magazine.
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Copper and silver good for spa systems? Are you kidding us? Longer kill times, fewer biologicals killed, shorter reproduction periods are not exactly something I would want in my tub if I had one or any other tub I care for. That doesn't touch on the potential for staining!
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I think it's a good idea, don't they use UV light to kill bacteria already in things like tooth brushes? More details and pictures here: <a href="davewirth.blogspot.com/2012/02/illegal-light-bulbs.html" rel="dofollow">Illegal Light Bulbs</a> Thanks, Frank
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Having read all these very good comments i would like to toss in that Silver/Copper ionisers are a very ood system for spas and only require some monopersulphate or H2O2 as an additive (apart frtom a water balance now and then) to be the most effective hot tub treatment. We are a pool ioniser company Down Under and utilise an Eco oxidizer to supplement our pool ioniser...very effective oxidizer. We are at present incorporating our Mini B product with our Eco Oxidizer to create a hot tub/spa unit that will be extremely effective in both sanitizing the hot tub as well as oxidizing and crunching any nasties and fats along the way. waiting for our UL's and we are going to be looking at the USA Pool/Hot Tub market..soon enough...I just returned from AZ after several weeks fact finding and visiting many parties and also a conference in Phoenix...actually got married at easter in Sedona aftyer almost 14 years together with my Lady. Just thought I would mention that...Apache Srevice at Red Rock Crossing...funky. Geronimo was there...Cochise couldn't make it...lol Ian Jones
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Russ Chrysanthou Thursday, 26 April 2012
Enjoyed reading all the comments. Good questions have been raised on the effectiveness of UV-C in a spa application. The speed of the water passing question is highly relevant as well as the wattage of the lamp.
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Jeff, You are right, but it will be sold as it is. You need 30,000 MJ2 at a certain flow rate to sterilize certain waterborne pathogens with a low pressure lamp. UV loses its transmittance after certain lower temperatures and higher temperatures. Work this into the mathematical formula and you would have the answer of the proper wattage and proper flow. I agree with your statement, mine was simply that a 10 watt low pressure lamp @ 35 GPM at the temperature of a spa is normally, is incorrect and will not work. Commercial systems are in use now all over the world, but they use high pressure systems at 60,000 mJ2 and their math is different. This is no more simpler than doing a calculation to reach a certain result. I do manufacture UV and do not want the industry to get a "black eye" with the consumer such as salt systems caused when consumers were led to believe it was "chlorine free". Theres lot of angry pool owners out there. Its not up to the consumer or dealer to have to learn everything about the science in order to cross check if they are "getting the proper dose". its up for us to support and live by the science so this will never be a question in their mind.
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Thank you Andy for your factual details and information. We need to make sure the public is informed of what the products can deliver and not to cloud (sorry for the pun) the science. Otherwise, the public might shy away from spas altogether. This also is a case of not all UV is the same.We have been manufacturing spas UV systems for more than a decade and we are careful to make sure they work as touted. It is important to determine the correct sizing of the UV unit for the type of spa and its use. Spas are used for fun and relaxation; however, the warm water is also a breeding center for many water-borne micro-organisms. And the warm water has more evaporation thereby making the halogen treatment more volatile. Apparently Ozone does not mix well with bromine (see recent MAHC et al). And today, Ultraviolet water treatment for spas is gaining use for water treatment in recreational spa facilities and in portable spas and hot-tubs. The anology of a Christmas light is not far off which shows the importance of design for properly sizing the UV-C treatment systems. A few simple questions should help: Are they properly designed to deliver the UV dose necessary to eradicate the water-borne micro-organisms? Do the UV-C units meet the flow rates of the spa pumps? Are the units energy efficient? Check with your UV-C manufacturer to make sure they meet specifications.
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Bruce, The sizing of the clear ray system is incorrect. To add to that when the water reaches a certain temperature above 90 de, transmittance UV water drops tremendously. If you will send me your e-mail I will send the graph. As far as hundreds of years, UV has been used by nature as sunlight to reduce the effectiveness of microorganisms. Many municipalities use uv as you stated, and we actually will produce the hydrogen peroxide that will be used in many of these municipalities. The verifiable fact is that 35 GPM of water per minute across a 10 watt lamp will not be effective in sterilizing water at the higher temperatures in a spa. Not at 30,000 mj squared. There is a list of what it will sterilize under that, but it wont make anyones spa chlorine free, etc. My problem is the science is being 'twisted" and metered down and in the end the consumer will just have to dump more chemicals in their spa, because everything is "metered down" The water does not have a chance at being sterilized at this rate. Nonetheless, it works well with mineral cartridges to help it along. I believe the above posts can explain how the technology is being abused and consumers will be led up the stairs and the door slammed in their face. If you input 150 watts on a UV lamp and the output is 52 watts, how can you input 10 watts with an out put of 3-5 watts in high temperature water with lower transmittance and expect to get this to work? Check out roberts link- it seems to spell it out. Thats my beef- tell the industry the full story, use the technology correctly and give consumers a viable working product, not a christmas light under a spa called UV.
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The largest portion of the market is the residential homeowner. The marketing will zero in on them. Will they get told the whole truth? I don't see that as being one of our industry's strong points so the answer is NO. That is a problem. Ours is not the only industry that that situation exists though, so we aren't alone.
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I am skeptical of the advantage of using a small supplemental sanitizer UV system due to some of the above concerns of cost of maintenance and ineffectual dosing of UV energy. I still think ozone sized and used properly is the best supplemental sanitizer as it takes care of the greatest sanitizer load which is bather waste etc that must be oxidized. This leaves the bromine or chlorine free to take care of the pathogens although halogen resistant organisms can be a problem esp in public pools where it would be advisable to use multiple layers of treatment. As far as ozone damaging covers and pillows, although we see it when oversize ozonators are ran for too long, we see far greater damage from using chlorine in the hot water environment and as such high recommend that it not be used as the primary sanitizer in residential tubs. This has just been our experience over the last 26 years.
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uv simplifies bleach..... like adding thiosulphate..... therefore you will use more chlorine bleach when you have uv... and once the organism has been killed you still have to bleach out the dead bodies breakdown..... uv has been around the spa industry for many decades and it has no magic.... indeed , if the bulb is not changed when its efficiency is gone you can grow algae and have green water..... the comments make are all good ones that the whole spa industry needs to pay attention to.... goes around comes around....