Viqua Model E4 Plus Ultraviolet System with UV Intensity Monitor


In Stock as of 8:00am EST

  • 1″ MPT Connections
  • 99.99% Destruction of Bacteria, Cysts & Virus
  • 22 Gallons Per Minute
  • UV Intensity Monitor
  • Whole House UV System


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Need a replacement UV lamp? This system uses the
UV Max 602806 Replacement Lamp

UV Max Model E4 Plus has an LED display showing lamp replacement reminder in days & UV Intensity Monitor with diagnostic test feature.

Model E4 Plus must be used with a CoolTouch Fan kit sold separately at the bottom of this page.

Model E4 Plus also has all the standard features of Model E4, 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.

Model E4 Plus features a lamp timer reset button and mute button to silence audio alarm, along with lamp life display counter.

UV Max Model E4 Plus offers the advanced features that used cost much more. With disinfection available at 16-42 GPM, Model E4 Plus is ideal for large households 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
  • 1" MNPT Connections

Operating Parameters

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

Additional information

Weight 11 lbs
Gallons Per Minute

Country of Origin

Viqua Professional Series UV System Brochure


Viqua Professional Series UV System Service Manual


Parts / Accessories

  • UV Max Quartz Sleeve for E/Plus & E4/Plus Systems

    Part#: 602733
  • Ultraviolet Installation Kit – 1″ Plumbing

    Part#: UV-Install-Kit-1
  • UV Max Solenoid Kit with Junction Box, 120V – 1″ NPT for E4 PLUS and F4 PLUS Series

    Part#: 650717-002
  • UV Max Lamp/Quartz Sleeve Combo for E4 & E4 PLUS Systems

    Part#: 602810-103
  • UV Max Replacement Lamp for E/Plus, E4/Plus & PRO7 Systems

    Part#: 602806
  • 20″ x 4-1/2″ Clear 5 Micron Sediment Filter Kit for UV System

    Part#: UV-KIT-20-BB-C
  • 20″ x 4-1/2″ Blue 5 Micron Sediment Filter Kit for UV System

    Part#: UV-KIT-20-BB
  • CoolTouch Valve Kit for All Viqua Systems with 1″ Ports

    Part#: 650538
  • 3/4″ or 1″ Dielectric Union for UV Light – 1″ Ports

    Part#: DF-1