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UV Dynamics Ultraviolet Lamp #400128 | Free Ship

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Replacement UV Dynmaics Ultraviolet Lamp Part #400128

This is a Genuine UV Dynamics Ultraviolet lamp. This UV lamp Installs in minutes without any tools for easy DIY. Comes with replacement 0-ring to keep water tight. This UV lamp is for UV Dynamics units UVD400, UVD400/S & UVD400E. Please check out our video above for How to Maintain this Unit. Also replaces Rain Fresh R830L.
  • Clean quartz sleeve whenever it becomes discoloured for maximum performance
  • Do not touch the quartz sleeve when cleaning or installing 
  • Made in Canada by UV Dynamics
  • Measures 20 5/8" in length

Product Number UVS 400128


The UV Dynamics 400128 UV Lamp is a replacement lamp for the UV Dynamics UVD400

And other UV Systems. Annual lamp replacement ensures optimal disinfection performance and will extend the service life of your Ultraviolet Disinfection System Controller. 

UV Dynamics designs and manufactures Ultraviolet (UV) water disinfection systems for your family. UV water disinfection is a proven, affordable, environmentally friendly technology that can help you to ensure the safety of your water supply.

Extreme weather, spring snow melts and run-off from agriculture activities are all affecting the safety of private water sources. Even municipal water can no longer be assumed to be safe with boil water advisories becoming more frequent in many communities. Compared to chemical disinfection, UV water disinfection can never overdose, has no effect on taste and odour, and no carcinogenic disinfection by-products are produced with UV water disinfection. UV water disinfection is considered effective against cryptosporidium and giardia pathogens which are almost completely resistant to chlorine. UV water disinfection systems have low operating costs and no tools are required for maintenance or lamp replacement.  Check out our YouTube video above for replacement advice.

All our UV models incorporate both audio and visual lamp failure indicators along with an annual lamp change reminder timer. Many models also incorporate an isolated low voltage solenoid drive circuit for an optional water shut-off solenoid valve.


All products include FREE standard shipping in Canada!

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Customer Reviews

Based on 52 reviews
Lorraine F. (Sandford, CA)
Excellent UV lightbulb

I have been using UV Dynamics lightbulbs for my water filtration system for many years and they continue to perform well.

Hi Lorraine! Thank you so much for your kind review. We are happy to hear that our UV Dynamics lightbulbs have been serving you well for many years. We strive to provide reliable and high-quality products for our customers. Thank you for choosing us for your water filtration needs. Have a great day!

Mike F. (Newburgh, US)

Customer service was very helpful and the U. Light and Filter products specific to my system arrived within days.
The installation videos make DIU replacement simple. Water eStore is amazing

Thank you, Mike, for your kind words! We are glad to hear that our customer service team was able to assist you and that the products arrived quickly. We strive to make the installation process as easy as possible with our helpful videos. We appreciate your support and thank you for choosing Water eStore!

Jo C. (Rockwood, CA)
Great bulb and service

Thanks for the great product, service & support video for easy installation.

Thank you, Jo, for taking the time to leave such a positive review! We are happy to hear that you are pleased with the UV Dynamics Ultraviolet Lamp #400128 and our customer service. We strive to provide a great product and helpful support for our customers. Thank you for choosing us!

Jim S. (Oshawa, CA)
Ensure you have the right Part

Gary and company were great in helping us get the right part for our UV Dynamics ultra violet system to keep our water safe!

Thank you, Jim, for taking the time to leave a review! We are happy to hear that our team was able to assist you in finding the right part for your UV Dynamics system.
It is our priority to ensure that our customers have safe and functioning products. We appreciate your support and hope to continue providing excellent service in the future. Thank you for choosing us and our product.

Debra H. (Portland, US)

UV Dynamics Ultraviolet UV Lamp 400 Part #400128

Hi Debra,
Thank you 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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