Grifaid Family Filter
The Safe Water Trust Ltd
A pump-incorporated filter to treat water for groups up to 59 people.
The Grifaid® Family filter is a household water filter that produces safe drinking water on demand at a rate of 120 L/hr by fixing the device to a container with the untreated water and pumping (see user manual). It uses hollow fibers/ultra-filtration membranes to eliminate biological pathogens from water sources such as shallow wells, rivers, ponds and lakes, down to 0.01 microns and is designed to last at least 5 years (see fact sheet). This product is designed and produced by The Safe Water Trust, a non-profit organization based in the United Kingdom in association with Grifaid Charity and Rotary Club.
~49 USD (35 GPB) Converted on June 17, 2021, Interview with representative.
Goal 6: Clean water and sanitation
Target users include individuals and communities of humanitarian aid projects in developing countries and those who need emergency relief, while the target customers include humanitarian organizations and governmental institutions.
Grifaid family filters are mass-produced by the UK-based non-profit organization The Safe Water Trust Ltd.
As of 2019, just over 40,000 Grifaid® Family filters have been distributed Interview with representative, in more than 50 countries, including the DRC, Gambia, Ghana, The Philippines, Syria, Lebanon, OPT-Gaza, and Haiti.
Is this filter designed for individual, household, or community use?
Manufacturer-specified flow rate (L/hr)
Laboratory-evaluated log scale removal rate of bacteria
Does the system use microfiltration, ultrafiltration, nanofiltration, or reverse osmosis?
Laboratory-evaluated log scale removal rate of viruses
Laboratory-evaluated log scale removal rate of protozoa
Reduction levels of heavy metals and/or arsenic through this treatment system
Manufacturer-specified maximum level of inlet turbidity (NTU)
Range or value of outlet turbidity levels (NTU)
Description of materials of construction
Is there safe water storage integrated into this product?
What is the total number of liters that is recommended can be filtered?
The device consists of a hand pump to bring water to the filter and a 120-micrometer mesh-prefilter for large particles, creating a two-way cross-flow that continually washes the membrane while pumping. It is based on a cross-flow ultra hollow fiber filtration membrane with a pore size of 0.01 micrometers (MWCO 150kDa), and it has a built-in flushing system with a backwashing syringe. It has a dry weight of 1.2 kg and its dimensions are 480 x 100 x 140 mm.
Grifaid Family Filter Manual
The filter can become damaged and therefore not work properly if it is exposed to direct sunlight for an extended time period, is exposed to very high or very low temperatures (under 5°C or over 45°C), or if it is physically struck. Damage can be determined through air leak testing which can be performed by the user and for which instructions are provided in the operations manual.
Filter does not require spare parts, but replacement “o” rings are provided with each filter.
This product has an operating life of > 5 years and of 200,000 L in its lifetime capacity, depending on maintenance and feed water quality, and includes a 1-year international limited warranty.
The Grifaid® family filter was designed to eliminate microbial contamination to make water safe to drink for groups of up to 59 people. The designer specified performance objectives included: affordable, long-lasting, easy to use, portable, and usable anywhere.
Tests conducted by the school of Civil Engineering of New Castle University indicated a high removal efficiency of E. coli. Microbial Reduction Evaluation by the Department of Soil, Water and Environment of the University of Arizona determined a removal of MS-2 bacteriophage of 4.9-5.75 Log and of E. coli of >5.23 Log.
Potential hazards include the consumption of unsafe water that can lead to gastrointestinal problems due to damage or failure to follow the use and maintenance instructions in the user manual.
A container or any type of vessel to collect the untreated water is required for the Grifaid® Family Filter to be fixed on. Also, a container to collect the filtered water.
Dao Trinh,Ngoc., 2018, Development of a Decentralized Drinking Water Treatment Plant Based on Membrane Technology for Rural Areas in Vietnam, Kassel University Press, pp. 46.
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