Viqua 3.5 GPM 12 Volt UV System VT4/12
Viqua 3.5 GPM 12 Volt UV System VT4/12
UV water treatment component designed to disinfect water by neutralizing bacteria and microorganisms without chemicals (17" x 2", 3.5 GPM).
Product Resources

Viqua 3.5 GPM 12 Volt UV System VT4/12
The VIQUA VT4/12 3.5 GPM Ultraviolet System is a compact 12-volt UV water disinfection system designed to provide reliable chemical-free drinking water treatment for low-flow and point-of-use applications.
Ideal for cottages, boats, RVs, solar-powered systems, and individual faucets, the VT4/12 offers dependable ultraviolet disinfection in a durable, energy-efficient design.
This system replaces the legacy Sterilight SC2.5 and SC4 systems.
Key Features
• Genuine VIQUA ultraviolet water disinfection system
• 12-volt UV system for off-grid applications
• Treats flow rates up to 3.5 GPM
• Compact point-of-use UV system
• Ideal for cottages, boats, RVs, and solar installations
• Chemical-free water disinfection
• Durable stainless steel chamber design
• Easy installation and maintenance
• LED power indicator light
Perfect for Point-of-Use Applications
The VT4/12 is designed for low-flow applications including:
• Single faucet installations
• Drinking water taps
• Water fountains
• RV water systems
• Marine and boat systems
• Off-grid and solar-powered applications
Advanced UV Water Disinfection
This system uses ultraviolet technology to disinfect water as it flows through the chamber, helping reduce harmful microorganisms without adding chemicals, taste, or odor.
Compact & Energy Efficient
The compact chamber design allows installation in tight spaces while maintaining efficient operation.
The system operates on:
• 12V power
• 20 watts
• Approximately 0.4 amp draw
This makes it ideal for battery-powered and low-energy installations.
Simple Installation & Maintenance
The durable stainless steel chamber is designed for easy installation and servicing.
Helpful installation and maintenance videos are available above the product images.
Replacement Parts
• Replacement UV Lamp: S330RL
• Replacement Quartz Sleeve: QS-330
Specifications
• Product Code: UVS VT4/12
• System Type: 12 Volt Point-of-Use UV Water Disinfection System
• Maximum Flow Rate: 3.5 GPM (13 LPM)
• Connection Size: 1/2" MNPT
• Power Consumption: 20 Watts
• Current Draw: 0.4 Amps
• Dimensions: 17" × 2 1/2"
• Metric Dimensions: 43.6 cm × 6.5 cm
Additional Information
• Replaces Sterilight SC2.5 and SC4 systems
• Ideal for off-grid and low-flow applications
• Installation and maintenance videos available above product images

Real People. Real Support.
We’re a small team of water filtration specialists who care about doing things the right way.
Every product on our site has been chosen because it works, not because it’s trendy or pushed by a supplier.
If you ever need help, you’ll talk to someone who actually understands water systems and wants to make this easier for you.
FAQs
How do I cancel or edit an order?
How do I cancel or edit an order?
Unfortunately, we cannot cancel orders due to a change of mind. However, we understand that mistakes happen. If you need to edit your order information, such as the delivery address or contact number, please contact our customer service as soon as possible.
Here’s what you can do:
- Contact our customer service via email address, or Live Chat.
- Have your order number ready when contacting customer service.
- We cannot guarantee changes to orders after 24 hours of placement. This is because orders may be processed once received
How can I track my order?
How can I track my order?
You can track your order by checking the shipping confirmation email, which contains a tracking number and a link to the courier's website. Alternatively, log in to your account on our website, navigate to "My Orders," and click on the tracking link provided for your order.
What if there is a problem with my order?
What if there is a problem with my order?
If there is an issue with your order, please contact our customer service team as soon as possible. You can reach us via email, phone, or through the contact form on our website. Provide your order number and a brief description of the problem so we can assist you quickly.
I didn't receive all off my order?
I didn't receive all off my order?
If part of your order is missing, please check the shipping confirmation email to see if the items were sent separately. If all items should have arrived together or if you have concerns, contact our customer service team with your order number. We’ll investigate and resolve the issue promptly.

