iSSF (Intermittently Operated Slow Sand Filtration System)


The iSSF is a gravity-fed slow sand filtration system.

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Product description Brand name and product description

The iSSF is a large slow sand filtration system that is designed to be intermittently operated as water becomes available. Without requiring electricity, water is gravity fed through sand where bacteria and turbidity are removed.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Cambodia, Philippines, Nicaragua, Kenya, and the Democratic Republic of the Congo (DRC)Correspondence with CAWST

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"
Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

Each of the components (tanks, sand, valves and pipes) have different costs in different countries. Samaritan’s Purse requires a USD 10,000 donation to install a filter (including WASH and maintenance). However, an installation in Afghanistan costs USD 1,000.

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

Community-sized sand filters such as SSWM sand filter design.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

SDG 6: Clean water and sanitation

Target user(s) Target user/consumer base (country, income segment)

Rural schools and communities

The @AutodeskFdn blogged about our how-to guide for communities writing proposals for development projects