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The picture above shows the basic set up for a gravity fed water purification system. It is an extremely simple device that requires no electric power to use. Procure a couple of buckets (or other container types) locally and assemble them with the components below to create a fantastic water purifier. Systems like this have been deployed in disaster relief situations around the globe for many years and have been proven to be very capable and reliable. (See the technical notes for details).
 
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Siphon
Our Price: $1.75

The siphon hose can improve the flow rate of any gravity or pressurized bucket system by 2 to 3 times.  Insert one end directly into filter spout and place the other end at the bottom of the container.  The hose will fill with water and form a natural siphon which will pull water through the filter.  

Made of food grade vinyl, comes in 2 foot lengths for use with standard 5 gallon stacked bucket configurations.
Pre-Filter (Sock)
Our Price: $2.25

The pre-filter sock fits the 4x4 dome filter cartridges and is needed if you will be filtering water from a natural source such as a stream or pond that will have particulate matter in it.     This sock is installed over the main filter element and is used to remove larger particulates from the water.
Schader Valve
Our Price: $3.00

Air Pressure Valve for use in pressurized bucket systems
Replacement Spigot
Our Price: $4.50

The replacement spigot comes with all of the mounting hardware.   (Color of Spigot may vary.)
Long Siphon
Our Price: $5.25

This 6 foot long siphon can extend the flow rates of the 4x4 filters  well over 5x more than just dripping. (The higher the spout is from the other end of the hose the faster the water flow).    Insert one end directly into filter spout and place the other end in the collection container. The hose will fill with water and form a natural siphon which will pull water through the filter.   Makes a very nice alternative to pressurization,   they are also used for piping water in configurations where the collecting receptacle is not directly below the filter.  

See the 'separated' bucket system picture in the tech notes section for how the long siphon can be used with a bucket system.

Made of food grade vinyl.
Pressurization Kit
Our Price: $6.50

This kit consists of a schrader valve and hand pump to create air pressure inside an enclosure.   Pressurization increases the throughput of gravity fed drip systems.   This is used with an upper container that can be sealed (pressurized).
5 Gallon Bucket with Lid
Our Price: $8.50

Bucket and lid made from food grade plastic.   Use for gravity drip systems and bottom bucket of pressurized systems.

70 mil thickness

Bucket bottom injection mold pattern is used as the hole pattern for spacing of multiple filters
Pressure Lid
Our Price: $10.00

This Gamma Seal lid is used to create a pressurized bucket to increase water flow rate.  Increase depends on amount of pressure supplied.  This lid fits most 5 gallon buckets. (standard 11.5 inch diamater).  

The lids are advertised as air tight for normal storage purposes but we have found that they are not totally air tight when pressurized from within. Air will leak out slowly, however the water flow rates are still greatly improved.

This lid can also be used to create airtight, easy-open, storage for buckets instead of the regular hammer on/tear off lids that are commonly supplied.

Color of lid may vary.
2x3 "Stub" Replacement Filter
Our Price: $10.00

This is a 0.2 micron, 98% nominal,  (0.5 micron absolute)  ceramic filter with activated carbon but in a compact size.  

This filter is used in the hydration packs and travel bottles.

Silver treated to inhibit bacterial growth.

Contains enough activated carbon to last for approximately 60 gallons.

The filter comes with a gasket and wing nut.
4x4 Replacement Filter
Our Price: $16.75

Standard 4x4 replacement filter for gravity drip and pressurized systems.   Contains activated carbon.
2x10 "Candle" Filter
Our Price: $19.50

2 x 10 ceramic water filter
4x4 Arsenic Filter
Our Price: $33.25

This is a standard 4x4 dome filter with a 0.5 micron ceramic shell that contains a special media to remove Arsenic (Ferric Oxide along with activated charcoal).
4x4 Flouride Filter
Our Price: $33.25

This is the standard 4x4 dome filter with a 0.5 micron ceramic shell that contains a special media to remove Flouride  (Activated alumina along with activated charcoal).
4x4 Nitrate Filter
Our Price: $33.25

This is a standard 4x4 dome filter with a 0.5 micron ceramic shell that contains a special media to remove Nitrates
   
 
Assembly Instructions for building your own filter systems can be found on the technical notes page.