MSR AutoFlow Gravity Water Filter – 4-Liter System for Camping, Hiking & Backpacking

Hassle-Free Hydration for Every Adventure ⛺

The MSR AutoFlow Gravity Water Filter (4L) revolutionizes your outdoor experience with fast, pump-free water filtration. Whether you’re at a base camp or deep in the wilderness, this ultralight system filters up to 1.75 liters per minute using advanced hollow fiber technology. Forget endless pumping—just hang the reservoir and let gravity do the work!

Compact yet powerful, the AutoFlow packs down small and weighs less than traditional pump systems. Its durable film reservoir is tough yet flexible, while the food-grade lining ensures every sip tastes clean and fresh. Perfect for groups or solo adventurers who demand reliable, on-the-go water purification. ️

⚙️ Streamlined Filtration with Serious Performance

One of the standout features of the MSR AutoFlow system is its tool-free maintenance. Extended expeditions often require clean filters, and with this system, a quick rinse keeps water flowing strong. You’ll enjoy high performance without downtime—even in challenging conditions.

Built for the backcountry, this 4-liter version is ideal for base camps or group adventures. It offers a perfect blend of portability and capacity, giving you clean water without heavy gear. Choose the 2-liter model for lighter solo trips or minimal setups.

Key Features & Benefits

❓ Frequently Asked Questions

How do I use the MSR AutoFlow Gravity Filter?

It’s incredibly simple: just fill the reservoir, hang it from a branch or hook, and let gravity pull water through the filter into your container below. No pumping, no stress. ⬇️

How long does the filter last?

With proper care, the hollow fiber filter cartridge can last for hundreds of liters. Tool-free cleaning keeps the flow rate high during extended use.

Is this system safe for backcountry water sources?

Yes! The hollow fiber technology effectively removes bacteria, protozoa, and particulates—making it suitable for streams, lakes, and rivers. Always avoid chemically contaminated water. ⚠️

Can I drink directly from the reservoir?

The AutoFlow system is designed to fill bottles or hydration packs—not for direct sipping. You get clean, safe water wherever you choose to store it.

What makes this better than a pump filter?

No moving parts, less fatigue, faster flow rate, and easier cleaning. It’s especially great for group trips where water demand is high. ⛺

️ Built for Basecamps & Explorers

Whether you’re leading a backpacking group or setting up a long-term base camp, the 4-liter AutoFlow Gravity Filter offers convenience and volume. Set it up once and keep water flowing all day. The design allows for continuous refill and use, ideal for cooking, cleaning, and staying hydrated.

Why Outdoor Enthusiasts Love It

• “Set it and forget it—fills my bottles while I relax by the fire.”
• “Lightweight but holds enough for our whole group overnight.” ‍‍‍
• “So easy to clean, even mid-trip. Best filtration system I’ve owned.” ✅

Adventure-Ready, Eco-Friendly Choice

The AutoFlow system reduces the need for plastic water bottles and chemical purifiers, making it a greener way to hydrate outdoors. Plus, it rolls up tight for discreet packing and weighs next to nothing in your gear setup. ♻️

What’s in the Box?

• 4L Reservoir with Filter Attached
• Quick-Connect Hose
• Hose Clamp
• Cleaning Cap
• Storage Bag
• Instruction Manual

✅ Final Thoughts: A Must-Have for Outdoor Hydration

If you’re seeking a lightweight, reliable, and effortless water purification solution for your outdoor adventures, the MSR AutoFlow Gravity Water Filter (4L) is the top-tier choice. It combines speed, safety, and simplicity—keeping you hydrated while freeing you to explore.

Don’t let water filtration slow you down. Choose MSR and make every drop count. ✨