1. Filter up to 50 liters per day

  2. Clean water storage = 20 liters

  3. Greater than 99% of all microorganisms (typically greater than 99.9%)

  4. Guaranteed to last for 2 years


  1. Manufacturers Suggested Retail Price is 248 RMB/filter

  2. Please contact us for a price quote


RDPI ceramic water filters are made from a blend of 2 high quality clays and sieved rice husks.  The filters are fired to 950 C (1742 F) and in that process the clay becomes a hard ceramic and the rice husks are burned out leaving microscopic pours for the water to pass through. These pores are too small for microorganisms.  So the filter acts as a bearer removing microorganisms.

After the filters are fired in our factory’s kiln, each filter goes through extensive testing including checking for internal cracks and flow testing.  Those filters that pass all these tests are painted with a solution of colloidal silver. Silver is a known biocide that has been used for centuries and most recently by hospitals and NASA.

Filters can also move a high percentage of viruses from water because the clay used in making the filter is approximately 7% iron.  Iron in the ceramic matrix is positively charged and most viruses are negatively charged. Viruses are removed by adsorbing to the iron.

If you want to learn more about our factory and our process, please visit here.


  1. Highly effective (>99% efficiency)

  2. Easy to use

  3. Low maintenance

  4. Inexpensive

  5. Long lasting (> 2 years)

  6. Chemical free

  7. No electricity needed

  8. Locally made


The technology has been promoted by multilateral agencies such as the WSP & IFC, UNICEF, WHO a host of bilateral agencies, NGOs and businesses.

Over 35 ceramic water filter factories are in operation in 20 countries worldwide.

Real Results

A 2006 WSP/UNICEF-sponsored study of Cambodian households revealed that households who used Ceramic Water Purifiers reported approximately half the cases of diarrhea as opposed to control households.


The five key features of the RDPI Ceramic Water Filter Program that have led to its success are:       

  1. The appropriate, simple, yet highly effective design of ceramic water filters

  2. A manufacturing and quality assurance process that ensures only high quality filters are distributed

  3. A manufacturing process that is inexpensive, using locally available and sustainable materials

  4. An education program that informs people about the value of clean water, how filters work and how to take care of their filters and use them effectively

  5. A distribution network through schools, communities, local business and other non government organizations that provides an ongoing contact point for filter replacements, purchases and queries.