UV O Ring Set-UV O Ring Set (15.25,30,55watt)

UV O Ring Set-UV O Ring Set (15.25,30,55watt)

55/75watt UV Ballast (Old Style)

55/75watt UV Ballast (Old Style)

evoUV Ballast Box (Pond)

As low as £70.96

Easily replace the ballast box on evoUV models manufactured from 2021 onwards. 

Use the drop down list above to select the appropriate wattage of ballast box you require. Each box comes with the ballast pre-fitted inside the control box, cables, lamp connectors and end caps. (Replacement Washers and O-Rings are available to buy separately - click here)


Click here to view the replacement ballast box installation instructions.


Availability: In stock


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FAQ (23)

Customer Questions
What does an evoUV do?
UV Clarifiers clear green water which is caused by single celled green algae and prevent it from returning.
Where do I install the evoUV?
Usually the UVC will be the first piece of equipment after the circulation pump. On a pump fed filtration system this means the UVC will be installed before the pond filter, and on a gravity fed filter after the circulation pump that returns the water...
What is the length of the power cable on an evoUV?
The length of the power cable for UK models is 2.2metres.
How often do I need to replace the lamp on an evoUV
We recommend changing the lamp at the beginning of each year.
What fittings are required to plumb the evoUV in?
The 15,25,30,55 and 75watt models come supplied with 1.5" hosetails, you can also hard plumb using 1.5" BSP male fittings. You can find these fittings at the following links single-union-threaded-male-to-plain-female converter-threaded-male-to-plain...
Do evouv's come with bulbs?
Yes, bulbs and quartz sleeves are included in the box when you purchase an evoUV
Are the bulbs and quartz sleeves pre-fitted on an evoUV?
No, we encourage the user to gain experience in fitting the UV bulb and quartz sleeve, as they will need to do it every year in the future when they replace old bulbs with new. There are fitting instructions included in the user manual.
What is an evouv quartz sleeve?
It’s a tube that looks like it’s made of glass, which separates the pond water running through the unit, from the bulb. It’s very delicate, like glass, and should be handled with extreme care. Quartz sleeves should be cleaned regularly to ensure that...
Why is there no plug on my evouv?
evoUV adheres to UK pond equipment laws, and requires that it is wired into a safe, compliant, outdoor electrical system, ideally with an RCD cut-off. If you are unsure, consult a qualified electrician.
What replacement bulbs should I buy for my evouv?
Evolution Aqua distribute and recommend Osram, a world leader in UVC technology. Obtain these from an authorised Evolution Aqua dealer.
Are evoUVs suitable for saltwater?
Yes, all The evoUV clarifiers are suitable for saltwater, the Aquarium UV Sterilizer is made specifically for marine aquariums and is available in 15 and 25watt versions with additional fittings for connection to typical aquarium circulation...
How do I set-up and install an evoUV?
You can follow the step by step instructions located in the manual below or you can watch our YouTube video here: evoUV ManualWatch how to install an evoUV:
My pond water is not clear, is this due to the evoUV not working correctly?
Koi, goldfish and other pond inhabitants can cause murky water by stirring up the bottom of the pond. This murky water should not be confused with suspended algae. Always check all your pond filtration is working and is being maintained correctly prior...
My UV Bulb is not lit on my evouv, what should I do?
You need to investigate the power to your unit. Has your RCD tripped? If yes, check your wiring and reset. Examine the UV bulb for signs of failure, and replace if necessary. Is the UV bulb fitted correctly? Unscrew the end caps and ensure correct...
My evouv appears to be leaking from the end fittings?
This could possibly be caused by an incorrectly fitted, damaged or overtightened O-Ring on the quartz sleeve. Please check the quartz sleeve O-Ring, reposition it or if necessary replace it with a new one. Follow the steps on page 14 in the manual to...
What size evoUV do I need for my pond?
For help choosing the correct UV that is suitable for your pond. Please see the table below.
Which side is the inlet and outlet on my evouv?
The inlet and outlet can be installed either left (Inlet) to right (Outlet) or right (Inlet) to left (Outlet).
What do I need to reduce a 110W evouv from 2" to 1.5"
If you intend to use flexible hose, you would need: 2 x 2-1.5’’ reducing bushes – EA Code: R81-063 2 x 1.5’’ pressure to waste sleeves – EA Code: M35-050 2 x 1.5’’ solvent hosetails – EA Code:HOSETAIL15If you intend to use pressure pipe, you would...
How do I change the ballast on a pre-2021 evouv?
To change the ballast on a pre-2021 evouv watch the video below for the step-by-step process.
How often should I change the UV bulb of my evoUV Steriliser on my aquarium?
For optimum sterilisation results change the bulb every six months.
Will using evoUV sertiliser make my fish completely disease free?
No. The evoUV can only ever be effective on the water borne life stage of some diseasepathogens. It is not effective on any disease which is already on the fish’s body and doesnot have a mobile, water borne life stage. evoUV can be effective at lowering...
Do I need to turn evoUV Steriliser off if combining with medications?
Yes, this is because the Ultra Violet light may degrade the medication being administered tothe water. Read the instructions provided with the medication and take the manufacturer’sadvice.
How do I replace the ballast box on a 110W evoUV?
How to replace the ballast box on a 110W evoUV
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