Classic with Pre-Filter


Powered by four AA lithium batteries, using ultraviolet light, the Classic purifies an incredible 200 half-liters of water with a single set of batteries. Whether you’re hiking or camping in the wild, you'll be confident that you’ll have access to safe drinking water.

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SteriPEN Classic’s tapered end provides a snug fit with water bottles and with the SteriPEN Pre-Filter for wide-mouth water bottles, you have a reliable water purification system. Four AA batteries power the UV lamp that keeps working for 8,000 treatments so you know you’ll have safe drinking water far into the future.

When camping, hiking, backpacking or traveling the Classic with Pre-Filter pack is the perfect complement to a wide-mouth one liter water bottle. The 40×40 micron screen Pre-Filter fits perfectly on wide-mouth one liter water bottles and removes particulates that can get in the way of UV light in water. The Pre-Filter is designed to be stored directly on the wide mouth bottle and the SteriPEN Classic fits perfectly in the filter. Just insert Classic in the filter open, turn the bottle upside down, and gently rock to circulate light throughout bottle.

Contents: SteriPEN Classic, carrying case, Pre-Filter, and user’s guide. Three year limited warrantee.

Additional Information
Weight 5.5 oz
Dimensions 7.6 x 1.5 x 1.5 in
Lamp Life 8,000 treatments
Battery AA Lithium (Not included with purchase)
Battery Life Lithium Disposable: 200 treatments (16oz./0.5L), NiMH: 200 treatments (16oz./0.5L); Alkaline & NiCd not recommended.
Minimium Bottle Diameter 20mm (0.8 inches)
Filter Compatability SteriPEN Pre-Filter Included
User Guide en | fr | es | de
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Buy Online Buy SteriPEN Classic at | Eastern Mountain Sports  | Buy SteriPEN Classic at Campmor Campmor | Buy SteriPEN Classic at L.L. Bean L.L. Bean | Buy SteriPEN Classic at Gander Mountain Gander Mountain | Buy SteriPEN Classic at Bass Pro Shops Bass Pro Shops | Buy SteriPEN Classic at MEC MEC (CA) | Buy SteriPEN Classic at Cotswold Cotswold (UK)
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We have cycled thousands of kilometers, from the United States to El Salvador and we have used our SteriPEN Adventurer Opti every day while riding to purify our drinking water.
Nico El Salvador
Andrea Rees
Loving my Freedom @SteriPEN, what a difference and that's just in Paris & Nice so far! Love that I can get clean water anytime, anywhere.
Andrea Rees Paris, France
Lea Conlon
During our 5 week Hugging the Coast Kayak Expedition (research on seaweed) in northern Sulawesi, Indonesia we use used our SteriPENs every day! 
Lea Conlon Indonesia

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FAQs for Classic with Pre-Filter

Q: What is the difference between Classic, Traveler, Emergency and Defender models?
— Asked on January 17, 2014
A: All four of these models are basically the same device with different color schemes. All four products purify 1 liter of water in 90 seconds, 1/2 liter of water in 46 seconds. All weight the same and all four use 4 AA Lithium batteries either disposable or rechargeable. Differences UV Lamp Life The UV lamp in the Classic and the Defender are good for 8,000 treatments! Traveler and Emergency uv lamp life is 3,000 treatments. Warranty Emergency and Traveler models have a 1 year manufacturer warranty. Classic and Defender model have a 3 year manufacturer warranty. Included Filter The Classic model includes the Pre-Filter unlike other models.
Q: Can I use alkaline batteries with Classic?
— Asked on January 17, 2014
A: No. We do not recommend using alkaline batteries with any of our products. We at SteriPEN highly recommend Energizer Lithium AA batteries. View our batteries page for details.
Q: Does Classic work with a solar charger?
— Asked on January 17, 2014
A: Classic utilizes AA lithium disposable or rechargeable batteries. SteriPEN does not offer a compatible solar charger for AA Lithium rechargeble batteries in our product line. However, there are many vendors that offer solar charging units that recharge AA Lithium rechargeable batteries. One such product we highly recommend is the Goal Zero Guide 10 for rechargeble AA batteries and Goal Zero Nomad 7 Solar panel.
Q: I put in new batteries for my Steripen which I haven't used  in a few years. The green and red lights blink but there is no light in the tube. What am I doing wrong? Please advise.  Thank you.
— Asked by Nils on January 21, 2014
A: 90% of the time, when customers see this happen it is because they used Alkaline AA batteries rather than Lithium batteries. Check on the type of battery in your SteriPEN. If they are Lithium AA batteries and the lamp isn't turning on, there may be an issue with lamp. In this case call our support phone number (888-307-3978) or email [email protected] We will be pleased to trouble shoot and assist you with repair/replacement of your Classic if it is needed.
Q: Can any of these batteries be used NiMH/lithium-ion or lithium-sulphate
— Asked by otis on February 25, 2014
A: NimH works and aa lithium work with Classic|Traveler|Emergency|Defender models. more info about batteries is available here:
Q: Are there replacement bulbs or do I need to purchase an entire new PEN?
— Asked by otis on February 25, 2014
A: We can easily replace the UV lamp for you. Just contact [email protected] and say you need help.
Q: My Journey malfunctions intermittently with a flashing unhappy face circle and unhappy face battery display. Sometimes it works OK and sometimes it gets set up with the 1L indicator but as soon as I put it in the water the unhappy faces come up. What's the story here? Thanks, Nat
— Asked by nat crosman on April 12, 2014
A: Hi Nat, The reason for the unhappy face when you place the Journey in water is dependent on where you are seeing it. If you don't have the User Guide that came with your SteriPeN, you can find it here: Please feel free to contact our customer support department at [email protected]
Q: I've loved my SteriPEN Adventure Opti for about 2 years, but have only used it about 30-40 times. When I started use this year, it responds as normal with a green light, then flashing green as well as flashing LED next to the UV light. The UV light doesn't seem to be lighting though. How can I verify it's working? What manufacturer warranties are on my pen?
— Asked by Micah Christiansen on April 14, 2014
A: Hi Micah - The indicators you describe sound like your Adventurer Opti is functioning normally. If you need no longer have your User Guide and need help remember the how the indicator lights work, you can find a copy of the instructions here: For safety reasons, the UV light will not turn on until it is placed in water. If you are unsure that it is lighting in water, we recommend placing it in a clear glass, possibly dimming the lights so that the light from the lamp is easily observed. If then you believe it isn't on, please contact our customer support department at 888-826-6234. Your SteriPEN comes with a 3-year warrantee and we are here to help!

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