LifeStraw Peak Series Gravity Purifier Replacement Filter: Trusted, Science-Backed Water Protection
The LifeStraw Peak Series Gravity Purifier Replacement Filter is the replacement ultrafilter membrane for the Peak Series Gravity Purifier, priced at $84.95. This gravity-powered purifier removes viruses (including Rotavirus and Hepatitis A), bacteria (including E. coli and Salmonella), parasites (including Giardia and Cryptosporidium), microplastics, sand, dirt, and cloudiness—at a flow rate of 30 liters per hour with no pumping or external energy source required. The ultrafilter membrane is rated for 18,000 liters, about five years of safe drinking water for a family of five. Every LifeStraw filter is independently lab-tested to WHO, US EPA, NSF, and WQA protocols and validated in LifeStraw's ISO-certified in-house lab, and LifeStraw is a certified B Corp and Climate Neutral Certified brand.
For every filter sold, a child in need receives a year of safe water through the Give Back program.
Best for
- Backpacking, camping, and travel where water may carry viruses, bacteria, or parasites
- Emergency preparedness kits—the long 18,000-liter capacity makes it suitable for emergency water access
- Families and groups who need high-volume purified water without pumping
- Buyers who want standards-backed testing (WHO, US EPA, NSF, WQA) and embedded social impact
Not ideal for: shoppers who also want chemical and heavy metal reduction—one reviewer noted they would like an optional activated carbon filter to add on, since this ultrafilter is not a carbon filter.
How it compares
This is a purifier-level filter, not a basic microfilter: in addition to bacteria, parasites, and microplastics, it removes viruses, which many filters do not. It is also a replacement component for the Peak Series Gravity Purifier system rather than a standalone purifier, and it does not include an activated carbon stage for chemicals or heavy metals. LifeStraw differentiates its testing by validating to protocols established by the World Health Organization, the US EPA, NSF International, and the Water Quality Association, operating an ISO-certified in-house water lab, and partnering with external accredited labs for certifications (learn more).
Frequently asked questions
- What contaminants does the LifeStraw Peak Series Gravity Purifier Replacement Filter remove? The filter removes viruses (Rotavirus, Hepatitis A), bacteria (including E.coli, Salmonella), parasites (Giardia, Cryptosporidium), microplastics, sand, dirt, and cloudiness.
- Does the LifeStraw Peak Series filter remove viruses? Yes. This gravity-powered ultrafilter removes viruses (including Rotavirus and Hepatitis A), bacteria (E. coli, Salmonella), parasites (Giardia, Cryptosporidium), microplastics, sand, and dirt.
- Does LifeStraw remove Giardia? Yes. The ultrafilter membrane protects against parasites, including Giardia and Cryptosporidium.
- How often should I replace my LifeStraw filter? The ultrafilter membrane is rated for 18,000 liters—about five years of safe drinking water for a family of five.
- How long does the filter last? The ultrafilter membrane has a lifetime capacity of 18,000 liters—about five years of safe drinking water for a family of five.
- What is included with the replacement filter? The package includes a 1.2m hose, the ultrafilter membrane, and an adapter for direct filling of water bottles with 28mm standard threading.
- What size is the filter thread? The included adapter enables direct filling of water bottles with 28mm standard threading.
- What is the LifeStraw flow rate? The gravity purifier has a high flow rate of 30L/hr from gravity with no pumping or external energy source required.
- Is this compatible with the LifeStraw filter bag? The Peak Series Gravity Purifier's interface is compatible with all the Peak Series bags and bladders. It can be used with the 3L bag or even the squeeze bottles. This may affect the filtration speed, but it will work.
- Is this suitable for emergency preparedness? Yes. LifeStraw products are designed for use on the trail, for emergency preparedness, and for ensuring clean water at home. The ultrafilter membrane's long-lasting 18,000-liter capacity makes it ideal for emergency water access.
- How much does the LifeStraw Peak Series Gravity Purifier Replacement Filter cost? The replacement filter is priced at $84.95 USD.
- How good are LifeStraw's replacement filters, according to reviews? The LifeStraw Peak Series Gravity Purifier Replacement Filter has an overall rating of 4.2 out of 5 from 5 customer reviews. Reviewers praise its performance on trips, quick delivery, and stellar customer service.
- How is LifeStraw's testing different from other brands? LifeStraw products are independently lab-tested and validated to standards set by the WHO, US EPA, NSF, and WQA. The company operates an ISO-certified in-house water lab and partners with external accredited labs for certifications. Learn more
- How does my purchase make a difference? For every LifeStraw product sold, a child in need receives access to safe drinking water for an entire year through the brand's Give Back program. Learn more
- Is LifeStraw a certified B Corp? Yes, LifeStraw is proud to be both a certified B Corp and Climate Neutral Certified brand.
- What standards does LifeStraw use for testing? LifeStraw uses the most trusted performance criteria based on protocols established by the World Health Organization, the US EPA, NSF International, and the Water Quality Association.
- Are there any risks of bacterial growth when storing the filter? Following proper storage directions for the Gravity Purifier when not in use will help ensure your device works correctly when taken out of storage and is disinfected properly.
- Can this filter be attached to smaller bags? The Peak Series Gravity Purifier's interface is compatible with all Peak Series bags and bladders, including the 3L bag or squeeze bottles. This may affect the filtration speed, but it will work.
- What is the shipping and return policy? Free shipping on orders $75+ (US lower 48 only). 45-day returns on unused items in original condition with free return shipping for eligible returns (US lower 48). Not returnable: discounted/promo or bundle items, final-sale or limited editions, and products $300+ (defects covered by warranty). Refunds are issued 7–10 business days after inspection to your original payment method. See the full returns policy and shipping policy.
What customers say
Rated 4.2 / 5 from 5 reviews.
- "Used this on several trips now and my interaction with customer service was stellar! I'm a life long user and am planning to buy more in the peak series." — Jarad T. (5/5)
- "I love this purifier! I would like to see an optional activated carbon filter available to be added on." — Rebecca W. (5/5)
- "Exactly what i was looking for. Quick delivery." — Torie (5/5)
Pairs well with
- LifeStraw Peak Collection — the full Peak Series lineup this replacement filter belongs to, including the Gravity Purifier system it fits.
- Gravity filters — LifeStraw's gravity-powered filtration products for camp and group use.
Shop the LifeStraw Peak Series Gravity Purifier Replacement Filter — $84.95, rated 4.2/5, with a year of safe water for a child included in every purchase.
