Smart UV 40 Watt - Pentair Aquatics

Emperor Aquatics Smart UV 40 Watt
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  • Emperor Aquatics Smart UV 40 Watt
  • Why should I use a UV sterilizer?
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Smart UV 40 Watt - Pentair Aquatics

100% Recommend this to a friend (16 of 16)

SKU: 204905

reg. $389.99

Special Price: $331.49

In Stock: 61
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Quick Overview

Emperor Aquatics is now Pentair Aquatic Eco-Systems.

Why does BRS recommend this?

When it comes to UV most other companies will recommend a small UV for a large tank which in reality won’t do much more than make your water look a bit clearer.  If your ultimate goal is to keep bacteria, protozoa, and other free floating pathogens at bay there really is no better choice than Pentair Aquatics for UV sterilizers.  With their real world ratings, we have tried other UV sterilizers and really nothing else has come close.  Even though they are a bit more expensive than other brands, their performance makes them worth every penny.

Suggested Aquarium Size: 260 gallon or less

  • Inlet/Outlet: 1.5" Slip Unions

  • Minimum Operational Flow Rate: 157 GPH

  • Maximum Operational Flow Rate: 262 GPH

Pentair Aquatics SMART UV series features a compact space saving design which utilizes a 3" reaction chamber. When used properly UV Sterilizers significantly reduce the chance of encountering disease or algae outbreaks.


Full Details

SMART UV Manufacturer's Manual

UV sterilizers are most effective as a preventative measure against disease outbreak. While not infallible a properly sized and set up sterilizer will add a significant barrier to disease outbreak. Protecting your system and it's inhabitants will ultimately save money, promote long lived healthy fish and increase satisfaction received from the hobby. Sterilizers can also be used as a component of an effective strategy to current outbreak. Primarily to help ensure the outbreak doesn't re-emerge after treatment. Anyone who has had the misfortune to encounter an outbreak will appreciate the importance of preventive measures against future problems.


Bulk Reef Supply carries only the Pentair Aquatics line of UV Equipment because we feel they are the best UV sterilizers available to the aquarium industry and one of the few brands that offers legitimately sized units capable of fulfilling their claims.


Pentair Aquatics UV Sterilizers are superior to the competition in the following ways:

  • Sterilizers are accurately sized based on contact time, flow rate and tank volume to achieve realistic results.
  • Suggested sizes are based on end of bulb life to ensure continuous results
  • Suggested flow rates factor in the water clarity and UV Transmittance of typical aquariums rather than basing them on purified water.
  • Unique design maximizes the effective contact time by utilizing the full bulb length.
  • Pentair aquatics is trusted by zoos, universities and public aquariums including Duke University, Monterey Bay Aquarium, SeaWorld, Georgia Aquarium, USDA Agricultural Research


40 Watt SMART UV Sterilizer Specs

Model No. Maximum Aquarium Size No. Lamps/Watts Water Flow Rate Algae and Bacteria 30,000 µWs/cm² Suggested/Maximum Water Flow Rate
180,000 µWs/cm² Suggested/Maximum
Input Watts UV-C Output Watts Dimensions (Inches) Inlet/Outlet
02040 260 Gallons 1/40 943 GPH/1574 GPH 157 GPH/262 GPH 40 14 43¾" x 3½" 1½" Union


*Suggested flow rates are based on 80% power or "end of lamp's life" performance

*Maximum flow rates are based on 100% power or new lamp output

*Flow rates consider 90% UV transmissibility


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  • its ok By thegreatga on 12/22/2015

    I purchased this product for my fresh water planted aquarium. Current I have a coralife uv sterilizer, and before that some chinese made thing. So with that experience let me begin my expert review. First off, this thing is large, by large I mean huge. it consumes nearly my entire length of my 4' stand. Second thing I've noticed is the construction seems sloppy. Excessive glue marks and material casting marks makes we think it was assembled as fast as possible and was attempting to reach a certain price to performance mark. Engineering for the device seems like tempting fate. The quartz sleeve has 2 orings that seel it, however nice that sounds historically when placing 2 orings together bad things happen. The first long large and thick o-ring that compresses onto a normal round oring must be compressed evenly and only to a certain compression. I feel that the normal round oring shouldn't be needed or should be engineered out. But, it doesn't leak so I won't try to reinvent the wheel. Further inspection reveals a basic interior surrounding the bulb and quartz sleeve. With other UV sterilizers after a long period of time i've noticed that the plastic exposed to light brakes down, releasing a black powder to the aquarium. Its easily noticed when you put your finger into the unit and pull it out resulting in black carbon substance on your finger. Most cheap plastics don't handle uv light very well. I feel that a mirror finish or some special UV resistance coating inside of the unit would help, but time will tell if it holds up or breaks donw. Furthermore, with my coralife unit it has a insert that spirals around the internal quartz sleeve, forcing the water to circulate around the bulb longer, increasing expsoure time while not decreasing flow rate. Water in the emporer UV sterilizer makes 1 path the length of the tube, while the coralife makes several loops around the diameter of the tube. The transparent tubes on both ends of the emporer sterilzer helps let you know when its on. Another thing that could be considered a good thing or a bad thing (I consider bad) is the excessive long cord, the cord from the power supply to the sterilizer is 20 feet long!!!! I only need a good 6-8, not 20. Now I have to wind it up, and I think it causes unecessary stress on the power supply. Overal I feel that the unit is a good purchase, and I hope it proves true. I also purchased one for salt water aquarium, but only a smaller size. I also find it sad that a set of brackets are not included. I had to pick up a couple conduit brackets from my local store to make it look nice.
  • Great Product By Shawn on 10/26/2015

    This thing is big, but very easy to set up. Been up and running for two weeks now and everything looks great. Comes with everything you need for input and output connections. Just need a pump and tubing. I went with the Sicce Syncra 1.5. The hose barbs are 1" so if you want smaller you'll need to get reducer bushings and smaller barbs. Would definitely recommend this product.
  • Water is crystal clear By Michael on 5/30/2015

    After several months of battling a marine ich outbreak I finally got is cleared from my tank and all inhabitants are free of disease. I purchased the Emperor Aquatics Smart UV 40 watt as an insurance policy to help reduce potential for future outbreaks. This is not a guarantee, strict quarantine protocols still need to be followed. I have been very pleased with results, Unit is extremely well made and large. Size helps maximize UV exposure time. Water had always seemed clear to me, but in very short time the improvement was evident. Now crystal clear and everything is healthy. My Powder Blue Tang has never looked better.
  • Excellent By Greg on 2/3/2015

    I purchased this thinking it was an insurance policy on ICK....I was amazed at the water clarity and lack of any algae in my tank. I have since upgraded to a 300 gallon display and will be running (2) 40 watt. I will be soon be ordering another one
  • This is a great product! By Gregafin on 11/18/2014

    i was a tad bit intimidated by this thing because it was a little bigger than ive seen before in stores. after installing this sterilizer my water was at least 10X clearer than the day before. my tank is crystal clear and i feel good knowing im protecting my fish from harmful parasites reproducing in my tank. it also has slowed the growth algae considerably in no time at all. a definite 5 star rating from me
  • Great UV light / Insurance By BBoyter on 7/18/2013

    This review is for the 40watt Emperor Aquatics uv light.

    As many people have said this thing is huge. Comparing it to other uv lights there is no way that other lights work as well.

    Why you should buy:
    Amazing quality
    Clearer water (I didn't have dirty or cloudy water before but I could tell a difference)
    Insurance against disease outbreak (Tangs are my favorite but almost lost one to ick, Now I don't worry near as much)

    What to watch for:
    Make sure the pump you are using is matched to the flow rate for what you are trying to accomplish i.e. just algae control or algae and disease control.

    Other Note. When I received my unit the quartz tube had broken during shipping. While I had ordered many times from BRS I had not dealt with its customer service so I was a little worried. They are better than Amazon. I was worried it would be a problem to get a new one but BRS shipped it fast and I was up and running in no time. I will not buy my aquatic products anywhere else after such a great experience.
  • Very good overall By Turf on 3/25/2013

    Overall this is a solid built product with quality seals. A couple note worthy points that several have already mentioned

    1) It's BIG and would be tough to mount under a 6' tank like I have unless it was VERY organized. To get an idea of how big it is you should stop by Home Depot and hold up a 4" diameter pvc pipe. I placed mine on the floor between the tank and wall.

    2) No mounting brackets come with this unit but you can find them at any home improvement store... there are however not as clean to mount as with the smaller units.

    3) Worth buying a $30 flow meter to maximize the efficiencies of this unit.
  • Well built By Milford on 9/15/2012

    I have the 40 watt unit on my 180 gallon tank. Been in use for about a year now with no problems with the UV or my tank.
    Algae at a minimum and no outbreaks of any sort. UV is super well built and BRS has replacement bulbs stocked. This is my first UV in a system and this one has not let me down.
  • great product, very well built. By jason on 8/19/2012

    just got my 40 watt uv and it is a beast!!!! it is made well and i like the very detailed instruction that came with it. it is very large so you better have alto if room to install it. the quartz leave is heavy duty, and comes out really easy. i didn't give it 5 stars only because it didn't come with any type of mounting brackets or hardware. i feel it should have for the money it costs. i am having trouble finding something that will hold it good, probably just going to make something which slows down install. overall this is a product i would recommend. i will update after a few months of using it.
  • Larger than life By Robert on 2/8/2012

    This unit is huge. I bolted it under the bottom of my 100 gallon tank. My wife got it for me and she thought she had ordered the wrong part be cause of the size and I told her remember we are getting a bigger tank so sweetie you did good. I wish it came with an optional flow meter of a build in one.
  • Its a Big Deal! By David on 11/22/2011

    This thing works great--I had to get a bit creative with the plumbing because it is so big. I run it off a 2nd return pump in my sump. That pump feels my GFO, and Carbon Reactor as well at the UV filter. The discharge from the UV goes directly into the display tank.
  • This thing is really well built with heavy duty, top quality, components By Mark on 7/12/2011

    This thing is really well built with heavy duty, top quality, components. It comes with unions, and all the connectors (slip, threaded, and barbed) to plumb into your system.

    I also like that it’s used by zoos, universities, and public aquariums.

    Be aware this thing is big. It’s roughly 4 feet long and 5 inches round.


Ask a question

Product Questions

I have the unit mounted horizontally with the input and outlet positioned downward. But the chamber only fills 1/4 of the way with water. Is this correct, or should it be filled all the way. Or do I have it positioned incorrectly? Not enough room to position vertically
Question by: Don McLaurin on May 15, 2017 5:39:00 AM
Hey there,
You will always want to position or plumb the outlet so that the water will fill the reaction chamber completely. The outlet should be at the highest point possible. If you are unable to point the outlet up, you should plumb the outlet so that is goes above the UV reactor in order to prevent the chamber from emptying.

Answer by: Zack (Admin) on May 17, 2017 3:43:00 PM
What is the difference between this 40 watt uv and the other 40 watt smart uv. Why is this rated higher per gallon then the other?
Question by: Lance Barnes on Mar 29, 2016 10:01:00 AM
Great question!
The difference will come down to flow through the chamber as well as overall size.Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 30, 2016 11:38:00 AM
Does this setup come with every thing I need for a complete installation or do I need to purchase other items as well such as an additional pump and plumbing?
Question by: Ryan on Nov 23, 2016 8:13:00 PM
Great quesiton! You will need to purchase a feed pump with a flow rating around 160 GPH/300 GPH, as well as the plumbing needed to connect to this product's inlet and outlet. The inlet and outlet plumbing sizes are 1½" Union. :-)
Answer by: Randy (Admin) on Nov 25, 2016 8:51:00 AM
Which sicce model do you reccomend for the smart uv 40 watt? Thanks!
Question by: Ryan on Jun 28, 2016 9:37:00 PM
Great question!
The sicce 1.0 will work well with no head height. From there if there is back pressure or head height restricting the pump we recommend the sicce 1.5
Answer by: Connor (Admin) on Jul 1, 2016 9:51:00 AM
Can I get it with 210V AC ADAPTER?
Question by: Moh Aifan on Apr 13, 2016 3:07:00 AM
Great question!
All of our products are intended for use in North America and will not come with 210V adapters. For international orders you will want to contact the manufacturer directly. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Apr 13, 2016 3:05:00 PM
I thought you need to plumb the UV so that ALL water returning to tank from sump should flow through the Unit. But all of the set ups I have seen on You Tube show the UV being fed from separate pump in sump with water flowing through the UV and back to the sump? Doesn't sump-to-sump set up significantly decrease the effectiveness of the UV?


Question by: Mike on Jun 4, 2016 1:35:00 PM
Great question!
With these UV sterilizers in particular they will run on slower flow rates and increased water contact time. In most cases you will not need to return the water up to the tank but simply by drawing the water from an earlier section in the sump to a later section of the sump will improve performance. While ideally a full UV sterilizer could work the current set up with a feed pump works great on al of our units! Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jun 9, 2016 1:45:00 PM
Hey there,

I'm curious to know if 40 watts is too much for 150 gallon reef tank? Can you have too much wattage to gallons? I just want to make sure anything that passes through it gets nuked. Let me know what you think.
Question by: Michael Hardman on Apr 30, 2016 8:45:00 PM
Great question! With UV sterilizers it is almost impossible to "oversize", 40 watts should be great on a 150 gallon system :)
Answer by: Carter Mueller (Admin) on May 3, 2016 4:19:00 PM
do this unit comes with any type of holders at all and can i change my inlet/outlet to 1/2 inch, thanks
Question by: Carlos G Rodriguez on Jan 25, 2017 11:07:00 AM
Awesome questions! Although there are no hanging or mounting options for the sterilizer itself, you can use these PVC clips to hold it by the plumbing.

You can definitely reduce those fittings to meet your needs! :-)
Answer by: Randy (Admin) on Jan 28, 2017 10:52:00 AM
I've read that UV sterilizers can kill copepods and other beneficial critters, is that true? And if so can I run a UV sterilizer at a higher flow to keep algea at bay but not kill the good guys?
Question by: Eric Boyko on Jan 18, 2017 8:34:00 AM
Great question! Most beneficial creatures like amphipods, copepods, and beneficial bacteria do not live in the water column itself. They live in the pores and crevices of the rock and sand and the vast majority of them will not flow through the system and end up in the UV sterilizer. It is possible for a few to make it through, but it will not completely wipe out the entire populations. :-)
Answer by: Randy (Admin) on Jan 19, 2017 2:28:00 PM
replacement bulbs ?
Question by: artur mazurek on Jul 19, 2017 6:06:00 PM
Hey there,
Thanks for getting in touch with us in regards to replacement 40W bulbs for your UV sterilizer. Below I have included a link to the product that you are looking for. Please let me know if there is anything else that we can assist with. Thanks!
Answer by: Tyler Schafer (Admin) on Jul 20, 2017 10:36:00 AM
Can this be installed using an existing manifold?
Question by: Alex N on Mar 28, 2016 9:20:00 AM
Great question!
This certainly can be used with existing manifolds very easily. The unit will come with appropriate barb fittings to connect to 3/4" soft tubing. additionally you can use hard plumbing to connect the sterilizer. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 29, 2016 11:33:00 AM
Does BRS sell the bracket (clamp) to secure the UV sterilizer ?
Question by: RobertCA on Sep 13, 2017 12:25:00 PM
We do carry surface mounting clamps that can be used with the Pentair UV sterilizers. The 40w version does have a 3” body and the 3” mounting clamps will work with that sterilizer.
Answer by: Charlie (Admin) on Sep 13, 2017 12:40:00 PM
What size pump would you use ? 180 gallon sps ....
Question by: walter on Jan 25, 2016 2:42:00 AM
Great question!
We have had great luck with the Sicce Syncra Silent 1.5. This pump is a little over-sized however by the time it is plumbed in the flow will be reduced. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 3, 2016 12:02:00 PM