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When disasters strike, often electricity is disrupted creating further challenges for supplying safe drinking water. Worldover, through aid agencies and NGOs, Rainfresh gravity water filter systems have been providing safe drinking water from virtually any water source (lake, river, pond, stream, well etc) without the use of pumps or electricity.

These stainless steel gravity filters (SS304) utilize Rainfresh’s unique ceramic filtration technology to trap >99.99999% pathogenic bacteria (e.g. E. coli) and protozoan cysts (e.g. Cryptosporidium & Giardia) in addition to reducing sediment and suspended matter down to 0.3 micron absolute (1 micron = 1/1000 mm).

The gravity filter system has two stainless steel (SS304) containers, one on top of the other. Four ceramic cartridges are housed in the top container which is filled with untreated water. Water slowly passes through the ceramic cartridges where bacteria, cyst and other microbes are retained and killed. Safe water collects in the bottom container under gravity at a rate of up to 2.6 liters per hour.

These systems have the following features and benefits

A) HIGH PERFORMANCE FILTRATION
– Rainfresh stainless steel gravity filter systems are tested and certified by CSA International to NSF/ANSI 53 for reduction of protozoan cyst (such as cryptosporidium & Giardia).
– They have also been independently tested for >99.99999% removal of E. coli, Salmonella typhimurium (typhoid), Vibrio Cholera,Shigella dysenterie (dysentery) and many other microbes

B) EASE OF USE
– Rainfresh stainless steel gravity filters are extremely easy to assemble and use. Pictorial and easy to understand instructions are included so that anyone can assemble the unit in the field.
– To use, water simply needs to be poured in the top container and after a few hours clean water can be collected from the bottom container

C) CHEMICAL-FREE
– No chemicals are required. So water tastes good at all times
– Some chemicals can react with natural organics in the water creating carcinogenic byproducts. No such potential with Rainfresh gravity filters

D) NO ELECTRICITY REQUIRED
– No dependence on electricity means safe water anytime anywhere

E) CLEANABLE, RE-USABLE FILTER CARTRIDGE
– A unique benefit of Rainfresh gravity filter systems is that the ceramic cartridges are cleanable. When sediment and dirt plugs the exterior surface of the ceramic cartridges, they can be simply scrubbed and cleaned using a scrub pad included with the unit.
– Get thousands of litres of clean and safe drinking water from a single set of cartridges

F) DURABLE, COMPACT AND EASY TO TRANSPORT

• Sturdy 304 stainless steel body gives years of trouble-free service.
• Compact dimensions & light weight of the gravity systems make them easily transportable at low cost to disaster areas.

Click below to download (English PDF)

Brochures (PDF) :

• SM4 Stainless Steel Gravity Water Filter English
  
• SM4 Stainless Steel Gravity Water Filter French
  
• SM4U Stainless Steel Gravity Water Filter English
• SM4U Stainless Steel Gravity Water Filter French

Performance Data Sheet : SM4 & SM4U Performance data Sheet

Product Manual : SM4 Steel Gravity Water Filter Manual

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Rainfresh steel gravity water filter provides safe drinking water from virtually any water source (lake, river, pond, stream, well etc) without the use of pumps or electricity to disaster stricken areas and places without access to safe drinking water

The stainless steel gravity water filter utilizes Rainfresh’s unique ceramic filtration technology to trap >99.99999% pathogenic bacteria (e.g. E. coli) and protozoan cysts (e.g. Cryptosporidium & Giardia) in addition to reducing sediment and suspended matter down to 0.3 micron absolute (1 micron= 1/1000 mm).

The system has two stainless steel containers, one on top of the other. Four ceramic cartridges are housed in the top container which is filled with untreated water. Water slowly passes through the ceramic cartridges where bacteria, cyst and other microbes are retained and killed. Safe water collects in the bottom container under gravity at a rate of up to 2.6 litres per hour.

Rainfresh gravity water filters are an excellent choice for providing safe, clean and bacteriologically safe drinking water in many countries. For communal use Rainfresh AquaResponse Systems are also available.

These systems have the following features and benefits

A) HIGH PERFORMANCE FILTRATION
– Rainfresh steel gravity water filter systems are tested and certified by CSA Group to NSF53 for reduction of protozoan cyst (such as cryptosporidium & Giardia).
– They have also been independently tested for >99.99999% removal of E. coli, Salmonella typhimurium (typhoid), Vibrio Cholera, Shigella dysenterie (dysentery) and many other microbes

B) EASE OF USE
– Rainfresh steel gravity water filter systems  are extremely easy to assemble and use. Pictorial and easy to understand instructions are included so that anyone can assemble the unit in the field.
– To use, water simply needs to be poured in the top container and after a few hours clean water can be collected from the bottom container

C) CHEMICAL-FREE
– No chemicals are required. So water tastes good at all times
– Some chemicals can react with natural organics in the water creating carcinogenic byproducts. No such potential with Rainfresh gravity filters

D) NO ELECTRICITY REQUIRED
– No dependence on electricity means safe water anytime anywhere

E) CLEANABLE, RE-USABLE FILTER CARTRIDGE
– A unique benefit of Rainfresh gravity filter systems is that the ceramic cartridges are cleanable. When sediment and dirt plugs the exterior surface of the ceramic cartridges, they can be simply scrubbed and cleaned using a scrub pad included with the unit.
– Get thousands of litres of clean and safe drinking water from a single set of cartridges

F) DURABLE, COMPACT AND EASY TO TRANSPORT

• Sturdy stainless steel body gives years of trouble-free service.
• Compact dimensions & light weight of the gravity systems make them easily transportable at low cost to disaster areas.