Katadyn Steripen Classic 3 UV Water Purifier with Prefilter

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Trusted in the mountains and on international trips, the handheld Katadyn Steripen Classic 3 UV water purifier with prefilter is simple and quick to use to ensure your water is safe for drinking.


  • This updated version of the Classic has a new LED display, a more ergonomic design and the ability to accept alkaline, lithium and NiMH batteries (sold separately)
  • Ultraviolet (UV-C) light rays safely purify clear water by destroying 99.99% of protozoa (including giardia and cryptosporidia), bacteria and even viruses
  • To purify your water, just click a button and gently agitate the water with a quick stir
  • If clear water is not available, no worries—the included prefilter clears particulates and debris from water
  • To use the prefilter, remove filter cartridge, insert the Steripen Classic 3 into the prefilter's center, turn bottle upside down and gently rock back and forth to agitate
  • Prefilter fits Nalgene® and most other water bottles with 63 mm wide-mouth openings; pour source water through filter, and clean water enters bottle
  • Purifies 16 fl. oz. (0.5L) of water (cold or warm) in less than a minute or 32 fl. oz. (1L) in a minute and a half
  • Small size fits most containers—use it in cups, mugs, water bottles and canteens
  • Steripen Classic 3 turns itself off once ultraviolet treatment is complete; can be used up to 8,000 times!
  • With 1 set of AA lithium batteries, the Classic 3 purifies up to 150L of water; with 1 set of 2,300mAh NiMH batteries, the Classic 3 can purify up to 100L of water
  • Alkaline batteries are not recommended for repeated use
  • Includes Katadyn Steripen Classic 3 UV water purifier, prefilter and instruction manuals; batteries not included


View all Katadyn Ultraviolet Water Purifiers

Technical Specs

Best Use


Filter Type


Filter Medium

Ultraviolet light


Protozoa, Bacteria And Viruses

Pump Force

Not applicable

Pump Strokes per Liter

Not applicable


32 fl. oz. per 90 sec.

Housing Material

Not applicable

BPA Free


Field Cleanable



7.3 x 1.7 x 1.7 inches


4 AA

Liters Treated Per Set of Batteries or Charge

Alkaline batteries: 50L / rechargeable: 100L / lithium: 150L


With batteries: 6.3 ounces

47 reviews with an average rating of 3.3 out of 5 stars

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