One Gallon Gravity Water Filtration System

Filter water for a group in as little as 7 minutes with a Sawyer Gravity System. Highly portable, these systems are ideal for scouts, small groups, and aid during emergencies. Just allow gravity to do the work.

Full Product Description

A lightweight, robust solution for filtering large quantities of water, Sawyer's Gravity System with Dual-Threaded MINI filter is ideal for backpacking, backcountry camping, and emergency preparedness.

Available in two models, the 1-Gallon Gravity System (SP160) comes with one bag and a MINI, while the 1-Gallon Dual Bladder Gravity System (SP2160) comes with two bags (one for dirty water, one for clean) and a MINI.

The Sawyer dual-threaded MINI water filter weighs just 2 ounces, fits in the palm of your hand, and is rated to 0.1 micron absolute filtration — removing 99.99999% of all bacteria, such as salmonella, cholera, and E.coli, and removing 99.9999% of all protozoa (such as giardia and cryptosporidium). The MINI also filters out 100% of microplastics.

With threads on both sides, you can screw the push pull cap onto the MINI for easy on/off functionality while filtering. Convenient and easily packable, this single- and dual-bag gravity system doesn’t require any pumping and is perfect for camping, hunting, fishing, scouting, disaster relief, and emergency preparedness kits, as well as on adventure travel excursions where potable tap and bottled water are not easily carried or safe to drink.

The 1-gallon bladders feature a wide mouth cap that allows for fast and easy filling, as well as a convenient carry handle. To set up a gravity system, first fill the reservoir with water from any source (a lake, stream, pond, glacier, kitchen faucet, etc.). Hang the bag — from a tree, the back of your pack, or hold it up with your hand — and connect the MINI to the included hose and let gravity do its work. Water will flow through the MINI to produce fresh, clean water for drinking and cooking.

The SP160 package includes a dual-threaded MINI water filter, 1-gallon bladder, cleaning plunger, and gravity hose with adapters. It also comes with Sawyer's Cleaning Coupling accessory. The SP2160 package includes a dual-threaded MINI water filter, dirty water bladder, clean water bladder, tube adapter with shutoff clamp, inline adapters, tube adapter, long tube, hanging strap with S-biner, cleaning plunger, cleaning coupling, push-pull cap, and hose guide. The SP2160 Dual Bladder Gravity System includes a second "Clean Water" 1-gallon reservoir to hold your filtered water.

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STATS AND SPECS

Filter Material

0.1 Micron Absolute Hollow Fiber Membrane

Longevity

up to 100,000 Gallons

removes

Bacteria, Protozoa, Cysts, and Microplastics

protection from

sweat resistant

liquid volume

 oz

HEIGHT

12.6

 inches

width

7.25

 inches

length

2.75

 inches

field Weight

1.22

 lbs

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Gravity Does the Work

After filling the bag, hang the reservoir with the MINI Filter below it from a tree, the back of your pack, or simply hold it up with your hand. Water will flow through the MINI to produce fresh, clean water for drinking and cooking.

Absolute Filtration

No Pore is larger than 0.1 micron in Sawyer Filters, meaning no harmful bacteria, protozoa  or cysts can pass through. Sawyer will not use average or nominal pore size ratings where larger pore sizes are present.

Rated up to 100,000 Gallons

Rated to filter up to 100,000 gallons, the Dual-threaded MINI can be cleaned and reused almost indefinitely with no expensive cartridges to replace… ever. We recommend backwashing and sanitizing the filter after every outing for optimized use.

maximum versatility

With threads on both sides, you can screw the push/pull cap onto the Dual-Threaded MINI for easy on/off functionality while filtering to control water flow. For even more versatility, screw the filter onto most disposable water or soda bottles for drinking (or backwashing with the Cleaning Coupling), or attach it inline to tubing between your hydration pack and bite valve (sold separately).

lightweight

With a total field weight of only 2 ounces, the compact MINI rolls up into its included collapsible mylar pouch to take up minimal space in your pack and won't weigh you down.

Frequently Asked Product Questions

Filter Compatibility

The Sawyer Squeeze FilterThe Sawyer Squeeze Filter can be used in conjunction with a hydration pack. Please see video Sawyer Squeeze with Hydration Pack using Inline Adapter and Sawyer Squeeze with Fast Fill Adapters.The Sawyer Squeeze Filter with Water BottlesThe Sawyer Squeeze Filter can also be used on water bottles when you are unsure whether or not it is safe to drink the water.The Sawyer Inline FilterThis convenient filter can be used as an inline filter on a hydration pack, a pre-filter for an existing pump system, with the provided faucet adapter, or with a gravity bag.

How long does the filter/purifier last?

Since the filters and purifiers can continuously be backwashed and re-used they have an extremely long life. The filter/purifier membrane may never need to be replaced, however when the flow rate slows or the filter clogs, simply backwash the unit with the provided backwashing device to clear out the pores.

What do you mean by 0.1 and .02 micron absolute?

Many other filters list nominal or average pore sizes which leave the possibility of harmful pathogens to pass through. By claiming absolute microns there are no variances in pore size on our filter membranes. At 0.1 and 0.02 micron absolute these are true barrier filters so there is no questionable time period whether the water is safe to drink.

How do I care for my filter during freezing weather?

Before initial wettingFilter is safe from freezing temperatures if it has never been wetted.After initial wettingWhile there is no definitive way to tell if a filter has been damaged due to freezing, Sawyer recommends replacing your filter if you suspect that it has been frozen.During tripsIf you are in freezing temperatures, we recommend that you store your filter in your pocket or close to your person so that your body heat can prevent freezing. THERE IS NO WARRANTY FOR A FROZEN FILTER.

How often do you have to clean or backwash the filter?

The frequency of cleaning depends on how dirty the water is. With relatively clear water, backwashing may only be necessary every 1,000 gallons whereas with extremely turbid or muddy water, backwashing may be required every 10 gallons. Nevertheless, backwashing is an extremely simple process and takes only a minute.

Do I need the pointONE Filter™ or the PointZERO TWO Purifier™?

To play it safe you can always take the pointZERO TWO purifier, but people in their natural environments typically only need bacterial protection because they build up immunity overtime to the viruses they have been exposed to.

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Lead with a moral obligation to protect people + your role helping. Combine with a commitment to avoid "me too" products or inverse - our products are differentiated

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