Neptune Series™
Hollow Fiber Water Filter


Nothing ruins the great outdoors like relying on a questionable drinking source. The Neptune Series™ filter delivers clean, reliable water without the hesitant sips or second-guessing. And with over twice the lifespan of standard filtration products, go ahead – drink up.

  • Filters 1,320 Gallons

  • Multiple Uses

  • Lightweight & Small 

  • Easy to Clean & Maintain

  • 5-Year Shelf Life

  • Fast Flow Rate (1 Liter/Minute)

  • Unique Pre-Filter Design

  • Eliminates: 99.9999% of Bacteria & 99.99% of Parasites

  • Lifetime Warranty

  • 30-Day Money-Back Guarantee

Product Description

Provide fresh drinking water for you & your loved ones during an emergency, at base camp, in the backcountry, or on the trail with the Neptune Series™ Hollow Fiber water filter.  

Our unique integrated pre-filter design uses a medical grade, durable synthetic fiber that blocks large chunks of debris before entering your filter housing, keeping your internal filter membranes clean & functional. It's easy to replace in the field, and eliminates the need for additional equipment like coffee filters.

Multiple Uses:

- Inline with hydration bladder tubing

- Survival straw - Drink from contaminated source

- Use as gravity fed system

- Attach to water bottles (SmartWater, Aquafina etc.)

Safely filter 1,320+ gallons of contaminated water for any emergency, survival situation, or outdoor adventure - That's a 4.2 year water supply for the average person, or 9,992 standard size bottles of  water.


  • Longer Lifespan. With a 5,000L lifetime capacity, the Neptune Series™ Filter can meet the average adult’s total hydration needs for up to four years!

  • Hollow Fiber Technology. Thousands of miniature fibers team up to filter 1.0L/minute – taking you from soiled water to sweet hydration in record time.

  • Safer Sipping. The Neptune Series™ filter removes 99.999% of bacteria (including E. coli), 99.99% of protozoa (including Giardia), and 99% of cloudiness and silt.

  • Pre-filter System. No more DIY hacks. Our medical-grade fiber pre-filter extends the lifespan of your Neptune Series™ filter. Simply unscrew and replace pre-filters as needed.

  • Flexible Compatibility. 28mm screw ports on each side of your filter are compatible with all Neptune Series™ products, the Tellus™ water bottle, and all standard soda bottles in a bind!

What's Included:
• 1 Water Filter
• 5 Pre-filter Replacements
• User Manual

How It Works:


Free & Fast Shipping 

Lifetime Warranty

Money-Back Guarantee

hollow fiber membrane water filter water purification & filtration

Using the same technology as kidney dialysis, thousands of miniature fibers team up to filter 1 Liter per minute.

28mm threads on each end are compatible with all standard water & collapsible bottles .

The Neptune Series™ filter removes 99.9999% of Bacteria (including E. coli) and 99.99% of Parasites (including Giardia)

Our unique pre-filter design extends the lifespan of your Neptune™ filter by trapping  particles of dirt and debris. 

Does your filter work with gravity fed systems? 

Yes, this filter can be used as a gravity filter, by hooking the "dirty" side to silicone tubing attached to your water source. If you already have a gravity system for camping/backpacking, you can use this filter with it, as long as the tubing fits the barbs. The tapered barbs on each end of our filter will fit anywhere from 1/4" silicone tubing, up to standard hydration bladder sized tubing.

Does this filter remove Viruses? What about salt, chemicals, metals etc. ?

Our Hollow Fiber Membrane filter with a 0.1 micron pore size removes the following:

• 99.9999% of Bacterias (including E. Coli)

• 99.99% of Parasites (including Guardia Lamblia)

• 99% of turbidity ("cloudiness" or "haziness")

Our filter does not filter salt water or remove viruses, harmful chemicals, or metals. Please use the proper equipment or sterilization tablets if you need to remove viruses from your water source. We recommend using a sterilization technique such as boiling or using sterilization tablets for long term use. 

What is the filter's lifespan?

The filter's lifespan is 5,000 Liters - 1,320 gallons (Equivalent to 9,992 standard water bottles).

Do you offer a warranty or money-back guarantee? 

Yes, we offer a 30-day money back guarantee, and a lifetime warranty on all of our products. Our 100% lifetime warranty has your back. 

What is the total weight? 

The filter weighs slightly less than 2 ounces (55 grams). 

Does the filter need to be cleaned after use? 

We recommend back flushing your filter with a mild bleach solution after use. To back flush, fill a water bottle with clean water (use a 1 Liter SmartWater bottle, collapsible water bag, or any standard water bottle) and screw your filter's "out" side onto the bottle. Squeeze the entire liter of water through your filter. Then, squeeze 1 Liter of clean water through your filter. This process should keep your filter clean, and ready to use for many years to come! 

Customer Reviews

Based on 11 reviews
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H2O Filter
warehouse manager salado outdoors

Meet Claire, our warehouse manager

About Us

Phoenix, Arizona

We’re Landon and Katrina, and we founded Salado Outdoors at our kitchen table in the spring of 2020 – yep, that spring of 2020. We both grew up hiking, camping, and getting dirty outside. We operate Salado Outdoors from the same place we founded it: our home. We pack and ship every product ourselves. If you experience an issue with your product, we’re the ones that answer the call. We don’t just sleep under the stars; we shoot for them too. Our goal is to simplify getting outside with a full line of flexible, hard-working adventure gear. For hardcore survivalists, afternoon ramblers – and every explorer in between.