One Gallon Gravity Water Filtration System
The Sawyer One Gallon Gravity Water Filtration System (SP160) is a compact, gravity-fed solution designed for filtering water with minimal effort. Built around the dual-threaded Sawyer MINI filter, it allows users to collect water, hang the reservoir, and produce clean drinking water without pumping.
Designed for portability and ease of use, the system supports backcountry travel, camp setups, and emergency preparedness where reliable water access is critical.
• One 1-gallon water bladder • Dual-threaded Sawyer MINI water filter • Cleaning plunger (syringe) • Cleaning coupling • Gravity hose with adapters
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
Gravity-Fed Operation
Filters water without pumping, reducing effort and simplifying use
Dual-Threaded MINI Filter
Supports multiple configurations and easy on/off functionality
Wide-Mouth Bladder Design
Allows fast filling from natural water sources
High Filtration Performance
Removes bacteria, protozoa, and microplastics from untreated water
Compact & Packable System
Stores easily in packs, kits, or vehicle setups
Individually Tested Filters
Each MINI unit is tested to meet performance standards
Fill bladder from water source
Hang reservoir above collection point
Attach hose and filter
Allow gravity to filter water
The numbers, flat and honest.
| Filtration | 0.1 micron absolute hollow fiber |
|---|---|
| Capacity | Up to 100,000 gallons |
| Flow Rate | ~1 gallon in as little as 7 minutes |
| Weight | 11.8 oz (system) |
| Filter Weight | 2 oz (MINI) |
| System Type | Single bladder gravity system |
| Operation | No pump required |
| Filtration Type | 0.1-micron absolute hollow fiber membrane |
| Filtration Capacity | Up to 100,000 gallons |
| System Weight | 11.8 oz |
WHY YOU’RE BUYING FROM STAY READY.
We aren’t the Amazon of survival. We’re a small, opinionated shop that carries gear we’d stake our own lives on — and we back every piece with real support.
Curated
Every brand we carry has been vetted in the field by our team. If it doesn’t pass our 30-day use test, we don’t stock it.
Authenticated
Factory-direct from authorized dealers. No grey-market, no refurb, no knockoffs. Your warranty is real.
Supported
Real humans on phone, text, and email — seven days a week. We carry this gear ourselves and we stand behind it.
American
HQ in California. Orders ship from our US warehouse. US-based customer care.
HOLLOW-FIBER WATER FILTRATION
More than an outdoor company. Pioneered hollow-fiber water filtration — 25M+ lives served clean water since 1984.
Sawyer Products was founded in 1984 in Safety Harbor, Florida — starting with a snake venom extraction kit and a chemical-protection line for serious outdoor use. A chance encounter brought them to hollow-fiber membrane filtration originally developed for kidney dialysis, and the rest of the company's mission rewrote itself. Today their 0.02-micron filters work for up to 100,000 gallons each, and through the Sawyer Foundation and 140+ charity partners across 80 countries, Sawyer reports more than 25 million lives served clean water. The company line: "Every Sawyer product you buy is a contribution to our common humanity."
- Founded in 1984 in Safety Harbor, Florida
- Pioneered hollow-fiber membrane filtration for outdoor use
- 0.02-micron filters good for up to 100,000 gallons
- Water filters, insect repellent, sunscreen, first aid
- 25M+ lives served clean water through Sawyer Foundation
Answers, straight up.
Product-specific questions on the left. Shopping with SRO on the right. Both open-ended — hit us if we missed one.
How long does shipping take?
Most orders process within 1–3 business days from our warehouse. From there: 5–7 business days economy, 2–3 business days expedited, or overnight if you need it fast. Free economy shipping on orders over $150 (contiguous US). Alaska, Hawaii, and Pro Eagle / freight items are quoted at checkout. You’ll get a tracking number and link the moment your order ships.
What’s your return policy?
30 days from the day your order arrives. Gear has to come back unused, with all original tags, stickers, and packaging intact. For standard items we’ll send a prepaid return label and deduct return shipping from your refund. Oversized or freight returns are on you, unless the item showed up damaged, defective, or wrong — in which case we cover it.
Refunds hit your original payment method within 10 business days of approval.
What can’t I return?
Final-sale items, gift cards, food and drink products, personal-care items, anything customized or engraved, briefs (hygiene), and hazardous materials. If you’re not sure whether something qualifies, email us before you order — we’ll tell you straight.
Do you ship outside the contiguous US?
Yes. Alaska, Hawaii, and US territories ship on freight-quoted rates calculated after checkout. International orders are available worldwide at variable rates; duties and import fees are the customer’s responsibility. EU customers get a 14-day cancellation window per EU consumer law, on top of our standard return policy.
My package arrived damaged — what now?
Email info@stayreadyoutdoors.com within 7 days of delivery with your order number and clear photos of the damage (product + packaging). We’ll replace, refund, or ship a return label on us — no back-and-forth. Damaged, defective, or wrong-item claims never cost you shipping.
Can I talk to a human before buying?
Yes. Email info@stayreadyoutdoors.com — we answer every message ourselves, usually within a few hours during business days. We carry this gear, we use this gear, and we’d rather talk you out of a kit that doesn’t fit your mission than sell you the wrong one.
Do you offer a military/first-responder discount?
Yes. Active-duty and veteran military, police, fire, EMS, and medical first responders get 10% off every order. Verify through GovX at checkout — one-time, secure, and reusable across thousands of brands. Discount applies automatically once you’re verified.