Gravity Filtration System for Hiking, Backpacking, Camping, and More!

The SYPS Gravity Filtration System is a portable, ultralight water filtration system designed for hiking, backpacking, camping, and outdoor emergency use. It uses gravity-fed microfiltration to turn water from natural sources — streams, rivers, and lakes — into clean, safe drinking water without requiring pumps, batteries, or electricity.

The system includes a 1-gallon (4L) gravity bag, a quick-connect hose, and an inline water filter. It weighs less than 8 oz, meets BPA-free and food-grade material stan

The SYPS Gravity Filtration System removes 99.999999% of bacteria — including E. coli and Salmonella — and 99.999% of parasites, including Giardia and Cryptosporidium. It also filters out 99.999% of microplastics, lead and other heavy metals, chlorine, organic chemical matter, dirt, sand, and cloudiness, while noticeably improving the taste and clarity of water.

The SYPS Gravity Filtration System works by using gravity to pull water through an inline microfiltration element, removing contaminants without pumps or power. To use it:

1. Fill the 1-gallon gravity bag with water from your source (stream, river, or lake)
2. Hang the bag using the included adjustable tree strap — it fits most trunks and branches
3. Connect the quick-connect hose and allow gravity to pull water through the filter
4. Collect clean, filtered water directly from the output end

The system flows at 0.125 gal/min (0.5 L/min), making it practical for individuals and groups alike.

The SYPS Gravity Filtration System filter lasts up to 200 gallons before requiring replacement. When the filter reaches the end of its lifespan, replacement filters and parts are available separately through the SYPS website, ensuring the gravity bag and hose components can continue to be used without needing to replace the entire system.

Setting up the SYPS Gravity Filtration System takes just a few steps. Fill the gravity bag with water from your source, hang it at height using the adjustable tree strap, and connect the quick-connect hose to the inline filter. Water flows through by gravity — no pumping required. The quick-connect/disconnect fittings make assembly and disassembly fast, which is particularly useful when moving between campsites or water sources.

A full instructional video and written user manual are available on the SYPS website for first-time users.

The SYPS Gravity Filtration System has a 1-gallon (4L) capacity. This makes it large enough to provide drinking water for a group after a long hike and to fill cooking pots or rehydrate dehydrated meals — as verified by customer reviews. The large screw port helps prevent spillage during filling, and the quick-connect port stops dripping during storage and transport.

The SYPS Gravity Filtration System weighs 14 oz (397 g) fully assembled — under 8 oz without water — making it one of the lighter gravity filter options available for backcountry use. Its compact dimensions (gravity bag: 17 × 9 in / 47.5 × 27 cm; hose length: 38.5 in / 98 cm) allow it to pack flat inside or attach to the outside of a backpack.

Yes. The SYPS Gravity Filtration System is made from BPA-free, food-grade materials and is REACH Certified and California Prop 65 Compliant, meaning it meets strict standards for chemical safety in products that come into contact with food and drinking water. Each unit ships with a cleaning tablet that should be used before first use.

Yes. The SYPS Gravity Filtration System is well-suited for emergency preparedness scenarios where access to treated tap water is limited or unavailable. Its ability to remove bacteria, parasites, viruses, heavy metals, and chemical contaminants from natural water sources means it can handle a wide range of water quality conditions. Its lightweight, packable design makes it easy to store in an emergency kit.

The SYPS Gravity Filtration System is designed to be easy to clean from multiple points. The small exit screw port and quick-connect fittings allow access from several angles, making it straightforward to flush and rinse the system between uses. Each unit comes with a cleaning tablet that should be used prior to first use. For detailed cleaning steps, refer to the included instruction manual or the user guide available on the SYPS website.

SYPS accepts returns on the Gravity Filtration System within 30 days of purchase, provided the item is unused, in its original packaging, and in the same condition as received. To initiate a return, contact the SYPS customer service team directly. Refunds are issued to the original payment method once the return has been received and inspected.

Note: The 100-Gallon Inline Water Filter (replacement filter) is non-returnable once purchased due to sanitary concerns.

The SYPS Gravity Filtration System and LifeStraw both use microfiltration to purify water in the field, but they differ in capacity and use case. The SYPS system holds 1 gallon (4L), making it practical for groups, cooking, and camp-wide water supply — not just individual drinking. Unlike a straw-style filter, it frees your hands during filtration and keeps the filter element away from potential dirt and contamination, a benefit noted by verified SYPS customers. The SYPS system also supports quick-connect hose disconnection, which allows for cleaner, more flexible field use across a wider range of outdoor scenarios.

SYPS accepts returns within 30 days of purchase, provided items are unused, in original packaging, and in the same condition as received. To initiate a return, contact the SYPS customer service team directly. Refunds are processed to the original payment method once the return has been received and inspected. A 24-month damage and breakdown protection plan — covering accidental drops, cracks, and extended parts failure — is also available as an add-on at checkout.