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UV Dynamics UV Replacement Ballast 400201 | Free Ship

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UV Dynamics MF-SLC120 Ballast. Part# 400201.

This is a Genuine UV Dynamics Ballast. This unit is for UV Dynamics Systems 6.40, 8.30 & UVD240. This Ballast is made in Canada

  • Lamp Expiry/Failure Indicator.
  • Lamp Change Reminder Indicator.
  • Genuine UV Dynamics Replacement Part
  • 4 Pin White Lamp Harness with Locking Bolt
  • Grounding Wire for Connection to UV Chamber
  • Includes Power Cord
  • Uses True Lamp Current Detection
  • Individually Calibrated and Tested Before Shipment
  • Image is not exact

Product Number UVS 400201

All products include FREE standard shipping in Canada!

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Customer Reviews

Based on 19 reviews
Lynn F. (Montreal, CA)

Worked as should

Thank you, Lynn, for your feedback! We're glad to hear that the replacement ballast worked as it should. If you ever need any further assistance, please don't hesitate to reach out to us.

Gualter R. (St. Thomas, CA)

I'm very happy

Thank you, Gualter, for your positive feedback! We are glad to hear that you are happy with our service. If you have any further questions or concerns, please don't hesitate to reach out to us. We are always here to help. Thank you for choosing us!

Gary C. (Ayr, CA)


Thank you, Gary, for your business!
We look forward to helping you again soon.
Take care and stay safe.

Jim S. (Georgian Bluffs, CA)
Replacing a UV Dynamics ballast

A recent electrical storm knocked out power to our whole house. The only casualty from the power spike was the ballast on our water filtration system. I was able to determine that through the series of Water Store self-help videos. From ordering the ballast to its installation, the fix was easy. The videos are a huge help as I had previously viewed one to replace the UV bulb.
Thank you Water Store for making the process so easy.
Jim Stewart

Hi Jim, Sorry to hear about your power failure. Thank you for your order and kind review of our UV Dynamics ballast! We're glad that we were able to help you out in a time of need and that the installation process was easy -- and you're welcome.
Thank you for your business, kind words, and for taking the time to write this review – much appreciated!
We look forward to helping you again soon.
Take care and stay safe.

Janna W. (Uxbridge, CA)

UV Dynamics UV Replacement Ballast 400201 | Free Ship

Thank you, Janna, for your business!
We look forward to helping you again soon.
Take care and stay safe.

About UV Dynamics

UV Dynamics brand’s competitive advantage is that they are the only UV Company that designs and manufactures in-house the power sources and disinfection chambers used in the production of its disinfection systems.   This results in vertical integration within North America with a beneficial lower cost (versus off-shore competitors) that is passed on to the consumer while ensuring the product quality is high.  UV Dynamics is located in London, Ontario where their products are produced.  They are a Castle Circuits Inc business group with sound principles that have been in place before 1975. 

 UV Dynamics Ultraviolet Disinfection systems are easy to install & service, use widely available non-proprietary consumables, and are made in North America. We offer YouTube videos that support UV Dynamics Ultraviolet Disinfection systems explaining how they work, how to install and service. We vet our suppliers and personally test all UV Dynamics products, installing them in our homes and monitoring their performance daily. They have a proven track record of not only building environmentally friendly and affordable products but also providing after-sales support and service. 

Water eStore carries UV Dynamics products and UV systems that offer extensive warranty coverage:  10 year pro-rated on the stainless-steel disinfection chamber; a 3-year warranty on UV power source; 1 year warranty on UV lamps, sleeves, and sensor. Beyond their warranty, we offer a 100% money back guarantee if you’re not satisfied with your investment in UV Dynamics water filtration products for your family. 


See all from UV Dynamics

Shipping Policy

We offer FREE Shipping anywhere in Canada. Once your order is placed, we process it the next business day and ship via ground transportation. In very remote locations, whenever the shipping costs become prohibitive we reserve the right to either cancel the order or ask that you contribute to the shipping costs, it's up to you. Your items may take anywhere from a few days up to a few weeks to arrive.

If you have any special shipping requirements, like requiring a signature at time of delivery, please leave a message in the "Special instructions for seller" section while checking out. If you order multiple products they may not all arrive at the same time as we ship from multiple warehouses and each item will be shipped directly to you. If no one is home when your order is delivered it will be left for you but we cannot assume responsibility for your order once it has been dropped off.

If you have any questions please contact us at

Thank you for your order, we appreciate your business!


Excluded Items

We do not offer refunds or returns on items built to order including Aclarus Ozone systems, Reverse Osmosis systems larger than 500 gpd or water softeners/iron filters over 1 cubic foot. 


Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

To complete your return, we require a receipt or proof of purchase.

Please do not send your purchase back to the manufacturer.


Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Late or missing refunds

  • If you haven’t received a refund yet, first check your bank account again.
  • Then contact your credit card company, it may take some time before your refund is officially posted.
  • Next contact your bank. There is often some processing time before a refund is posted.
  • If you’ve done all of this and you still have not received your refund yet, please contact us at

Sale items

Only regular priced items may be refunded, unfortunately, sale items cannot be refunded.


We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to: The Water Store 1004 King Street Midland Ontario CA L4R0B8.


To return your product, you should mail your product to:

The Water Store
1004 King Street
Midland Ontario CA L4R0B8

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

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