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Model # PT 12

Internet # 202708303

12 Ultraviolet Disinfection Unit

This item has been discontinued.
The Home Depot no longer carries this specific product.

$525.00 /each




Model # PT 12

Internet # 202708303

PurTest UV Disinfection Systems is an effective method to provide bacteria free water for your home or office. Ultraviolet disinfection kills bacteria, is safe to use, reliable and chemical free. UV treatment does not change the taste, odor, pH, or the general chemistry of water. UV systems are compatible with all other water treatment equipment; reverse osmosis, filtration, water conditioning, and softening. Simple and easy to maintain with only a periodic cleaning of sleeve and annual lamp replacement. UV systems operate with no moving parts to wear out, which makes UV one of the most effective and durable water treatment methods on the market. All models supplied with flow controls at 30,000 uws/cm2. Units include visual and audible alarms, 30 day replacement alarm, lamp life expired alarm, lamp out alarm, 1 year lamp timer, polished 304 stainless steel chamber, flow control included, 10 year warranty on disinfection chamber.

  • UV disinfection is an effective method to provide bacteria free water for your home or office
  • Kills bacteria in water, safe, reliable, chemical free
  • Visual and audible alarms
  • Simple and easy to maintain
  • Environmentally and user friendly, with no dangerous chemicals to handle or store
  • Compatible with all other water treatment equipment
  • Economical to use, hundreds of gallons may be treated for each penny of operating costs
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Fitting size (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Bypass valve 
Filter change indicator 
Filtration method 
Ultraviolet Light 
Fitting style 
Hardware Included 
Installation kit included 
Maximum feed water pressure (psi) 
Maximum feed water temperature (F) 
Maximum filtered water flow (gallons per min.) 
Minimum feed water pressure (psi) 
Minimum feed water temperature (F) 
Number of stages 
Product Weight (lb.) 
3.5 lb 
UV lamp 
Water Filtration System Type 
Whole House 
Water Filtration Technology 
Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
All parts of the unit are guaranteed for 1 year against defective parts and workmanship, except the uv lamp . Disinfection chamber is guaranteed for 10 years. American Water Service or sellers liability is limited to repair or replacement of defective parts and will not be held liable for damage arising out of the use of this equipment. 


Rated 4.0 out of 5 by 8 reviewers.
Rated 5.0 out of 5.0 by Quick & easy to install I wasn't planning to add UV filtration to my house, just a house filter. I thought, "$500 is a good chunk of change, and we've got pretty good water around here." Heck, even the filter was almost a redundancy. The next day, the morning news said: " ______ County water advisory- boil water order in effect... E-coli... fecal coliform...etc..." I ordered my filter that day. No regrets. After all, how much fecal coliform bacteria do you really want in your drinking water? The unit installed in less that a half hour, as part of a whole-house filter installation project. Basic plumbing/soldering skills required, but if you have those and can follow basic directions, no problem. The blue light lets me know from across the room that my water is being sterilized. I haven't tested water samples, but UV is pretty foolproof. I sleep better knowing my family is drinking clean water. October 30, 2013
Rated 4.0 out of 5.0 by Nice unit poor instructions Great unit. Constructed well. The installation instructions are poor at best. I am a great part change with instructions. This was a great part but lacked the reasonable instructions one needs to do the install. Mine came without a washer that was needed for the install. I called and after spending a lot of money on unit they charged me .85 cents for the missing washer and $5 for shipping. Wow they were helpful on that issue. Find the YouTube video it will really help to understand how the unit is put together and installation process. Make sure you have some plumber's grease to start the job. September 17, 2015
Rated 4.0 out of 5.0 by Installation issues Warning I cannot report on the quality of the operation of this unit because I broke it while installing it and I am waiting for replacement parts. It did not break because the quality is inferior. I broke it because the installation instructions are very badly written. The installation instructions are not sequential. They are beyond confusing they are not accurate. They use three different terms for the "End Nut" in the "Installation of the Quartz Sleeve", The instructions should caution you to remove/separate the "End Nut" from the "Brass Shroud" before installation. I only discovered this AFTER I cracked the Quartz sleeve. The description of how to install the Rubber O ring makes no sense. It tells you to "install the O Ring down the top of the Nipple" and "Avoid riding the O ring on any threaded part of the Nipple" as if you are installing the O ring over the threads. This is incorrect and very misleading. You are not told the "End Nut" which is called the "Compression Nut" or "Gland Nut", depending on which part of the instruction you read, must be removed from the "Brass Shroud. Were I packaging this unit I would never ship it with the "End Nut" already Installed in the "Brass Shroud" because once it is installed it looks like it is one piece. As a consequence I tried to install the "End Nut", which is mistakenly called the "Compression Nut" in the instructions, while it was still inside the "Brass Shroud" this resulted in my twisting the "Brass Shroud" cutting the "Rubber Grommet" and slicing into the "Shrink Tubing" which exposed the wiring to the "UV Bulb". My suggestion Remove the End Nut from the Brass Shroud. Insert the Quartz Tube Into the Chamber per instructions Install the Rubber O Ring onto the glass Quartz Tube and move it down until it is SEATED onto the top of the NIPPLE. Install the End Nut over the Quartz Tube onto the nipple. Gently tighten the End Nut until the compression shoulder inside the End Nut contacts the O Ring. Use only finger tight pressure. The next step is to install the UV Bulb. Gently insert the bulb into the Quartz Sleeve. While holding the bulb connect the plug to the pins on the bulb. Refer to "Installation of Ultraviolet Lamps" Gently lower the bulb into the Quartz Sleeve and slide the Brass shroud onto the End Nut. without twisting. I strongly recommend the manufacturer rewrite the installation instructions. Hopefully this will help others who choose this product. October 26, 2012
Rated 1.0 out of 5.0 by Horrible Instructions and Customer Service Robbie's review and comments are spot on and I highly suggest watching his video too before you try to install the device. I broke my quartz sleeve while trying to change the bulb after its first year. Called the company and ordered a new sleeve. They sent a bulb but not the sleeve. Long story short their customer service is horrible. Not really sure this a company I want to trust my water filtration needs to. December 14, 2014
Rated 4.0 out of 5.0 by clean water A couple of months ago we noticed a smell in the water. It tested positive for coliform bacteria. Our water softener tells us how many gallons per minute we use so I cracked open all of the faucets, got the reading and ordered the sterilizer that we would be sure wouldn't be over powered by flow. Just had it tested again yesterday. Clean water. I'm very happy with the results. There are a couple cons though. When you mount the unit it needs to be done in a way that allows removal of the bulb. I mounted mine horizontally, which isn't the normal mounting position but allowed me a better use of space for bulb changes. The seal and cap around the wiring harness is questionable but after some Teflon and a little more tightening, be careful, you'll break the tube, everything is water tight. September 25, 2014
Rated 5.0 out of 5.0 by Purtest 12 ultraviolet unit Easy to install. Watch YouTube video first before installing the tube and light. That will help out a lot and you won't break anything. February 4, 2015
Rated 5.0 out of 5.0 by exdcellent product great product-installation is easy if you know anything about plumbing. May 2, 2013
Rated 4.0 out of 5.0 by Easy to install. Prompt shipping. Just installed the unit so I have no long term quality comments. It was easy to install and the build quality appeared solid. Any home owner with basic plumbing skills should be able to install and maintain it. April 3, 2014
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