Agriculture
December 12, 2023
Rainfresh P2S Siphon Water Filter
Read SolutionImplemented by
Envirogard Products Ltd
Updated on December 7, 2023
·Created on September 27, 2018
The Rainfresh MP4U Gravity Filter is a silver-impregnated ceramic tabletop filter.
The Rainfresh MP4U Gravity Filter is a tabletop filter produced by the Canadian company Envirogard Products Ltd. and distributed in disaster response scenarios by Global Medic. The filter setup consists of four silver-impregnated ceramic cartridges, two buckets, a spigot for dispensing water, a filter gauge, cleaning mesh, and the necessary hardware for installation. The user fills the top bucket with dirty water and lets the clean water pass through the filters and into the bottom bucket at a max flow rate of 3 liters per hour.
Target SDGs
SDG 6: Clean Water and Sanitation
SDG 7: Affordable and Clean Energy
Market Suggested Retail Price
$135.00
Target Users (Target Impact Group)
Household, NGOs
Distributors / Implementing Organizations
Envirogard Products Ltd. manufactures the ceramic filter cartridges, the buckets, spigots, and other components are manufactured separately and shipped together or obtained locally and assembled on-site.
Competitive Landscape
Direct competitors include Purifaaya, Caminos de Agua Ceramic filters, Tulip Table Top Filter, and Nazava Water Filter.
Manufacturing/Building Method
Envirogard Products Ltd. manufactures the ceramic filter cartridges, the buckets, spigots, and other components are manufactured separately and shipped together or obtained locally and assembled on-site.
Intellectural Property Type
Trademark
User Provision Model
Users can obtain the product from Global Medic when it is distributed during natural disasters, displacements, and in refugee or internally-displaced peoples camps. It is also available for sale online from Envirogard for $135.
Distributions to Date Status
Partner NGO Global Medic has distributed more than 25,800 RainFresh Gravity Water Filters in Lebanon, Haiti, Somalia, the Philippines, Nepal, Vanuatu, Sudan, Pakistan, and Cambodia.
Type of filter
Ceramic candle (cartridge) filter
Primary material of construction
Silver-impregnated ceramic
Additives
No
Manufacturer-specified flow rate (L/hr)
3 L
Bacteria reduction
6 (99.9999%)
Virus reduction
Unknown
Protozoa reduction
Log 3 reduction of protozoan cyst (such as cryptosporidium & Giardia)
Heavy metals and/or arsenic reduction
Unknown
Maximum recommended influent turbidity level (NTU)
<0.5
Effluent turbidity levels (NTU)
Unknown
Maintenance schedule
Scrub filter cartridges every 3-5 days
Manufacturer-specified lifetime volume (L)
15,140 L
Safe water storage integration
25
Design Specifications
The filter setup consists of four Envirogard 7300G silver-impregnated ceramic cartridges in an upper 25L bucket over a sealed bottom 25L bucket with a spigot for dispensing water. It comes with a filter gauge for measuring the end-of-life of the ceramic candle, cleaning mesh, and the necessary hardware and pictoral instruction manual for installation.
Technical Support
Available during distributions from the partner NGO or through contacting the manufacturer.
Replacement Components
The four Envirogard 7300G silver-impregnated ceramic filter cartridges must be replaced after filtering 15,000 L or 12 months. The upgraded 7500G filter cartridges with an activated carbon core for taste and odor reduction are available for sale in Canadian hardware stores or online in packs of four for $90 but may be available for cheaper from the distributing NGO.
Lifecycle
The four Envirogard 7300G silver-impregnated ceramic filter cartridges must be replaced after filtering 15,000 L or 12 months. The filter gauge is used after cleanings to measure wear on the ceramic filter and indicates end-of-life.
Manufacturer Specified Performance Parameters
Rainfresh P2S siphon water filter units are designed to be affordable, mass-produced, easy to assemble and use, and last a family of five drinking 3 L/day each a full year.
Vetted Performance Status
The four Envirogard 7300G silver-impregnated ceramic filter cartridges must be replaced after filtering 15,000 L or 12 months. The filter gauge is used after cleanings to measure wear on the ceramic filter and indicates end-of-life.
Safety
No known safety risks if properly used and bottom bucket remains properly sealed against recontamination.
Complementary Technical Systems
None
Academic Research and References
“Globalmedic – disaster relief,” globalmedic, 08-aug-2019. Available: https://globalmedic.ca/
“bucket gravity water filter – traps and kills harmful bacteria (e. Coli),” rainfresh online store, 18-oct-2017. Available: https://rainfreshstore.ca/product/mp4-gravity-water-filter-ceramic/
Emily mathieu business reporter, “a canadian source for clean water in haiti,” the toronto star, toronto star. Https://www.thestar.com/business/a-canadian-source-for-clean-water-in-haiti/article_ca03263d-bd84-5f64-9169-19bed55dd89f.html
Goal 6. (n.d.). Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6
“#rainfreshhelps,” rainfresh. Available: http://rainfresh.ca/category/rainfresh-helps/
“bucket gravity water filter for clean safe drinking water,” rainfresh, 02-feb-2017. Available: https://rainfresh.ca/product/bucket-gravity-water-filter/
“contact,” rainfresh, 27-may-2015. Available: http://rainfresh.ca/contact/
Cawst, “manufacturer sheet: rainfresh 7300g/ 7500g ceramic filter cartridges,” available: https://www.hwts.info/document/6cb1a2dc/rainfresh-7300g-7500g-ceramic-filter-cartridges
“ceramic filter for gravity units -traps and kills harmful bacteria (e. Coli),” rainfresh online store, 15-feb-2018. Available: https://rainfreshstore.ca/product/ceramic-filter-gravity-water-filter-4-pack/
“assembly and operating instructions -siphon water filter model p2s please save for future reference,” rainfresh.ca. Available: https://rainfresh.ca/wp/wp-content/uploads/2017/02/p2s-instructions-oct-2008.pdf
“bucket gravity water filter for clean safe drinking water,” rainfresh, 02-feb-2017. Available: https://rainfresh.ca/product/bucket-gravity-water-filter/#tab-product_editor_12294_tab
Cawst, “evaluation: evaluation of the rainfresh ceramic filter model sst 7700 for the remova. Available: https://www.hwts.info/document/f318aad9/evaluation-of-the-rainfresh-ceramic-filter-model-sst-7700-for-the-removalinactivation-of-bacteria-an
“university of arizona in tucson, az,” arizona.edu. Available: https://www.arizona.edu/
“product certification & standards development,” csa group, 12-aug-2018. Available: https://www.csagroup.org/
Compliance with regulations
Rainfresh ceramic filter cartridges are tested and certified by CSA International to NSF53 for reduction of protozoa.
Evaluation methods
Laboratory testing with purified water seeded with microbiological contamination.
Other Information
None
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