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Viqua D4+ Model

Salesprice with discount
Additional UV Lamp
Additional Quartz Sleeve

tick pointWide variety of residential applications
tick pointEconomical and chemical-free way to safeguard drinking water
tick pointBe notified to any malfunctions with your UV system
tick pointSafety-Loc™ connector with interlock
tick pointDurable stainless steel chamber

Product Information

Ultraviolet Water Disinfection Systems from VIQUA

The New Viqua D4+ model includes a touchscreen LCD controller that will give you added peace-of-mind knowing you will be alerted to any malfunctions with your UV system. The new controller includes an advanced sensor to monitor system performance by tracking UV light intensity.

Clearly Clean Water Solution Installation Design 3 The quality of drinking water can change with time and become contaminated with harmful bacteria. The VIQUA HOME family of compact UV disinfection systems provide a reliable, economical, and chemical-free way to safeguard drinking water in any residential application. VIQUA’s range of products have been designed and tested to ensure quality drinking water is at everyone’s finger tips. Regardless of your need, there is a VIQUA system to suit your requirements. The D4 series offers disinfection for flow rates as high as 12 GPM, covering a wide variety of residential applications.

Features of VIQUA UV Water Disinfection Systems

Equipped to inactivate chlorine-resistant parasites such as Cryptosporidium and Giardia, harmful bacteria like E.Coli, and viruses not visible to the naked eye.

The special lamp plug ensures that no one can power the UV lamp if it’s not in the UV chamber, and a new and improved sensor on the D4+ ensures safe UV levels are maintained.

Our high output UV lamp is engineered to maximize UV output.

Indicator lights (D4 model) show the status of system components and warning lights appear when system maintenance is required.

Standard controller (D4 model) features a countdown to annual lamp replacement, a countdown reset button, and a warning alarm silencing button.
NEW LCD controller (for D4 Premium and D4+ models) features a large backlit display for easy reading, simultaneously displaying lamp life remaining, UV Intensity Status (D4+ only), support contact information, and lamp replacement reminder that indicates when the lamp needs to be replaced, ensuring continued water safety. The intuitive, user- friendly menu allows the user to quickly find the replacement parts needed for the system by using the replacement parts menu, as well as quick-reference instructions on board for system troubleshooting.

While other brands may have problems with water leaks, inconsistent UV power and installation issues, you can relax knowing Viqua is a high quality manufacturer that DOES NOT outsource production to China. Viqua is the best brand in the UV water disinfection market.


VIQUA Standard (30 mJ/cm2) 12 GPM (45 lpm) (2.7 m3/hr)
US Public Health (16 mJ/cm2) 23 GPM (87 lpm) (5.2 m3/hr)
NSF/EPA (40 mJ/cm2) 9 GPM (34 lpm) (2 m3/hr)
 Chamber  20.5” x 4”
 Controller  8.5” x 6” x 8”
 Inlet/Outlet Port Size  3/4" MNPT
 Shipping Weight  10 Lbs
 Voltage  100-240 V (50/60Hz)
 Power Consumption  50 W
 Maximum Operating Pressure  125 psi
 Influent Water Temperature  36-104 °F
 Visual "Power On"  Yes
 Chamber Material  304 Stainless Steel
 Visual Lamp Life Remaining  Yes
 Audible Lamp Failure  Yes
 Audible Lamp Replacement Reminder  Yes
UV Sensor  Yes


Typical Clearly Clean Water Installation Solution

View detailed diagrams showing alternative installation configurations.
Clearly Clean Water Solution General Installation Design

Home UV Systems connect to your main water supply and is best installed by a professional plumber. It is better to have a water by-pass flow with shut-off valves installed to make replacing your yearly UV bulbs that much easier.

Glossary of Terms

review list of other water purification terms...

GPM: Gallons Per Minute

Standard Output: VIQUA’s standard output UV lamp. They generate less heat, but require longer system lengths and exposure time to equal the dose delivered by other lamp types. Ideal for low flow applications. Minimal maintenance costs and heat radiation; full microbiological protection.

High Output: Higher UV power output; ideal for medium to high flow applications.

Amalgam Lamp Technology: For ultimate UV output; typically needed in high flow applications or NSF Class A installations. Due to higher power requirements, it is the preferred lamp technology for light commercial applications or public facilities.

2X Lamp Life: Long life - 2X greater lamp life vs. standard and high output lamps.

2X Output: 2X greater UV-C output vs. standard low pressure lamp technology.

4X Output: 4X greater UV-C output vs. standard low pressure lamp technology.

Constant Current: Ensures stable UV lamp current regardless of power fluctuations.

Safety-Loc: A UV connector design that meets UL979 safety requirements. VIQUA connectors have a built in mechanism that breaks power to the UV lamp and prevents accidental exposure to UV light outside of the chamber.

UV Lamp: The part of the UV system that emits the 254nm germicidal wavelength of UV light. In VIQUA systems, there are 3 types of lamps: Standard Output, High Output and Amalgam.

VIQUA Standard Dose (30mJ/cm2): VIQUA’s uncompromising dose value used to compare all VIQUA systems that do not require NSF Standard 55 Class A certification. Typically used for residential systems. This has been established as an industry standard in the UV water treatment industry.

Connector: The molded connector that the UV lamp plugs into.

Controller: The electronic module that supplies power to the lamp as well as feedback information of the status of the UV system (syn. ballast, power supply)

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Model Spec Summary

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