Membrane Solutions 1-Gallon Gravity Water Filter — UF Membrane Filtration with Included S2 Replacement Filter Cartridge

1-Gallon Gravity Water Filter — Portable, Lightweight, Reliable

Quick Overview - Compact 1-gallon gravity water filter designed for camping, hiking, travel, emergency preparedness, and everyday outdoor use. Lightweight and easy to pack, it delivers safe drinking water anywhere you go.

Core Filtration Technology - 4-stage filtration: 0.1‑micron hollow fiber ultrafiltration membrane, coconut-shell activated carbon (GAC), and dual PP fiber pre/post-filters. Effectively reduces sediment, odor, iodine, chlorine and heavy metals, and blocks bacteria and particles down to 0.1 micron. Rated to filter up to 5,000 liters of outdoor water.

Fast, Simple Operation - Gravity-fed design requires no pump or power — just fill the bag, hang, and let gravity do the work. Provides continuous flow of drinking water without manual pumping, making it ideal for group use at campsites or basecamps.

Innovative Backwash System - Detachable mouthpiece doubles as a convenient backwash connector for standard bottles — no syringe or extra fittings needed. Quick backwashing prolongs filter life and keeps performance consistent in the field.

Versatile Use Modes - Multiple configurations: use as a gravity bag, a direct-use straw, or attach an extension tube for greater reach. Compatible with most water bottles for filling or backwashing, giving flexible options for solo hikers or groups.

Easy Mounting and Durable Materials - Adjustable tree strap fits trunks and supports with a minimum length of 22.5 inches and a maximum of 41.5 inches. One-piece strap design minimizes loss. Food-grade, BPA-free materials ensure safe contact with drinking water.

Why This Filter Meets Your Needs - Reliable clean water on-the-go: large 1-gallon capacity and high-capacity filters reduce trips to water sources. - Low maintenance and long-lasting: easy backwash extends service life, and the 5,000-liter capacity covers extended trips. - Lightweight and packable: all parts store compactly in the included bag so it won’t weigh down your pack.

Technical Specs - Capacity: 1 gallon (≈3.8 L) - Filtration stages: 0.1 µm hollow fiber UF, coconut shell GAC, double PP fiber - Service life: up to 5,000 liters (subject to source water quality) - Adjustable strap length: 22.5–41.5 inches - Materials: food-grade, BPA-free

What’s in the Pack - 1-gallon gravity bag, ultrafiltration filter assembly, detachable mouthpiece/backwash connector, extension tube, adjustable hanging strap, storage bag.

Get consistent, safe drinking water on every outdoor trip with a portable gravity water filter that combines ultrafiltration, activated carbon, easy backwash, and versatile use options.