Tirta Cupumanik (TCM) are silver enhanced ceramic ‘pot’ water filters for household drinking water treatment manufactured in Indonesia based on the open source technology promoted by Potters for Peace.
SDG 6: Clean Water and Sanitation
Market Suggested Retail Price
Distributors / Implementing Organizations
Manufacturer in partnership with the Ministry of Research & Technology has established a business unit responsible for marketing and distribution, individual sales.
Locally sourced clay and risk husks are processed, mixed with water, pressed into the filter shape and fired to a ceramic state, flow rate tested to ensure product consistency and coated with silver nitrate solution. It is made of a mixture of clay and rice husk burnt about 600-800º C which in turn produces a ceramic pot through a vitrification process (changing the nature of clay to ceramic). Ceramic properties that can absorb oxygen produce fresh drinking water such as jug water.
Intellectural Property Type
User Provision Model
Users can obtain the product through market-based sales, NGOs, other organizations and institutions.
Distributions to Date Status
Type of filter
Ceramic pot filter
Primary material of construction
Filters are manufactured with clay, rice husk, silver nitrate.
There is a potential for silver in filtered water, below secondary guideline values of 0.1 mg/L
Manufacturer-specified flow rate (L/hr)
1–3.5 liters per hour when full
Heavy metals and/or arsenic reduction
TCM is only suitable to treat water which doesn’t have hazardous metals in it
Maximum recommended influent turbidity level (NTU)
Effluent turbidity levels (NTU)
99% removal for <5 NTU
When the filtration rate reduces it can be cleaned up with a scrub pad and water, but soap should not be used.
Manufacturer-specified lifetime volume (L)
Safe water storage integration
Depends on size of receptacle, ~6 L
The product consists of ceramic pots which have taps and lids attached. It comes in 4 different varieties based on the quality of outer body and size.
To rejuvenate flow rate when filters clog, users scrub ceramic filtering element with a brush.
Available locally: tap for dispensing water, safe storage container, ceramic filtering element.
2-3 years depending on turbidity of source water
Manufacturer Specified Performance Parameters
Performance targets 2 log reduction in bacteria, and to some extent reduces iron and manganese content in the water.
Vetted Performance Status
The product has been recognised and supported by international organisations as well as government.
TCM is suitable to treat only low turbidity water which doesn't have hazardous metals in it
Complementary Technical Systems
Pre-filter or settle very turbid water (>5 NTU).
Academic Research and References
Compliance with regulations
Currently household water treatment technologies are not regulated in Indonesia.