Viqua Model D4 Premium Ultraviolet System


In Stock as of 6:00pm EST

  • 3/4″ MPT Connections
  • 99.99% Destruction of Bacteria, Cysts & Virus
  • 12 Gallons Per Minute
  • Whole House UV System
  • Display of Lamp Life & Troubleshooting Guide


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Need a replacement UV lamp? This system uses the
UV Max 602805 Replacement Lamp

UV Max Model D4 has all same features as Model C4, including a controller with water resistant case, indicator lights on the power source showing the status of each system component. A stainless steel chamber with safety cap (can not be removed while light is on) and special lamp plug are standard.

In addition, Model D4 Premium features a new LCD graphical display of lamp life remaining, troubleshooting hints, product support information, and our contact information for troubleshooting.

UV Max Model D4 offers the advanced features that used cost much more. With disinfection available from 9-23 GPM, Model D4 is ideal for household or light commercial use.

All UV Max Systems include all components and accessories needed for initial installation and use. These include UV Lamp, Electronic Ballast, Quartz Sleeve & 304 Stainless Steel UV Reactor (Water Chamber).

UV Max Systems treat the water for the whole home, eliminating 99.99% of bacteria and viruses including chlorine-resistant cysts that are not tested for in routine water tests (such as Cryptosporidium and Giardia)

How does Ultraviolet Sterilization Work?

The germicidal energy of ultraviolet light destroys harmful microorganisms by attacking their genetic core (DNA). This powerful dose of UV light eliminates their ability to reproduce, and the organisms simply die.

Water is purified by running it through a watertight chamber that contains an ultraviolet lamp. As water flows past, microorganisms are exposed to a lethal dose of germicidal UV energy.

Purification with the UV Max is a safe, natural process that adds no chemicals and does not affect the taste or odor of your water.

Specialized, high output UV lamps maximize the output of germicidal UV energy.

Standard Features

  • Audible/ Visual Lamp Failure Alarm
  • No-tools Maintenance
  • Safety Cap
  • Electronic Power Supply
  • Mounting Bracket
  • 3/4" MNPT Connections

Operating Parameters

  • Iron less than 0.3 ppm
  • Hardness less than 7 grains (120 ppm)
  • UV transmittance greater than 75%

Additional information

Gallons Per Minute

Country of Origin

Viqua Home Series UV System Brochure


Viqua Home Series UV System Service Manual


Parts / Accessories

  • UV Max Quartz Sleeve for C/C4, D/Plus & D4/Plus Systems

    Part#: 602732
  • UV Max Lamp/Quartz Sleeve Combo for C, C4, D, D4 & D4 PLUS Systems

    Part#: 602810-102
  • 20″ x 2-1/2″ Clear 5 Micron Sediment Filter Kit for UV System

    Part#: UV-KIT-20-C
  • 20″ x 2-1/2″ Blue 5 Micron Sediment Filter Kit for UV System

    Part#: UV-KIT-20
  • UV Max Replacement Lamp for Model C, C4, D/Plus, & D4/Plus Systems

    Part#: 602805
  • 3/4″ or 1″ Dielectric Union for UV Light – 3/4″ Ports

    Part#: DF-34
  • Ultraviolet Installation Kit (for Male Port) – 3/4″ Plumbing

    Part#: UV-Install-Kit-34M