The Katadyn Drip Filter is a tabletop ceramic filter containing three filter candles in an upper 10 L bucket for dirty water and a lower 10 L bucket for dispensing filtered water.
The Katadyn Drip is a tabletop ceramic filter containing three filter candles in an upper 10L bucket for dirty water and a lower 10L bucket for dispensing filtered water. It comes with either Ceradyn silver-impregnated ceramic filter candles or Gravidyn, which also contains activated carbon for chemicals removal.
Worldwide, Mexico, Thailand
Goal 6: Clean water and sanitation
Households, Campers, Groups
Katadyn filters are distributed to families participating in the Mexican government’s project “Sin Hambre,” which is run by the Ministry for Social Affairs. Since the project started, Katadyn has delivered over 60,000 filters to Mexico. Other distributions include the countries of Thailand, Bolivia, and Puerto Rico.
Description of the type of ceramic filter (pot, candle, or disk)
What primary material is used (ceramic, mud, clay etc.)?
Additional materials added to improve disinfection
Manufacturer-specified flow rate (L/hr)
Laboratory-evaluated log scale removal rate of bacteria
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)
How often/when should maintenance be performed?
What is the total number of liters that is recommended can be filtered?
Is there safe water storage integrated into this product?
The Katadyn Drip weighs 3.3 kg and is 45 by 25 cm. It is a gravity household water filter for 1 to 6 people, with 4 liters per hour filtration through three ceramic filter candles. It comes in two versions: the Ceradyn and the Gravidyn, where the Gravidyn contains an additional activated carbon element for chemicals and chlorine reduction. The filters are designed to be long-life, low-maintenance, and last 2 to 9 years.
All schematics available in the Product Information Sheet.
Technical support is provided in the instruction manual online.
The Ceradyn filter cartridge capacity is 50,000 liters per filter, so for the Katadyn Drip, which contains three filter candles, the lifetime capacity is 150,000 liters. For a family consuming 15 L of drinking water per day the expected lifetime of the Ceradyn filters candles are 9 years with low turbidity or 2 years with high turbidity. The full Katadyn Drip system comes with a 2-year warranty.
The Ceradyn version eliminates bacteria, protozoa, cysts, algae, spores, sediments and viruses in combination with particles greater than 0.2 microns. The Gravidyn version also reduces chemicals.
A randomized controlled field trial found that Katadyn Drip ceramic filters were effective at improving the microbiological quality of drinking water in a low-income community in rural Bolivia in 2004. Independent labs Bachema and Spectrum also confirmed the bacteriological reduction of the Ceradyn and Gravidyn filters in a controlled setting.
To prevent contamination of the filtered water, the instruction manual recommends: letting filter elements dry completely in the air if the filter is not going to be used for longer than two days, cleaning the filter system (container and filter elements) at least once a month, keeping it out of direct sunlight,
and replacing a cracked filter immediately.
Safe household water treatment and storage using ceramic drip filters: a randomized controlled trial in Bolivia
Clasen T, Brown J, Suntura O, Collin S; (2004) Water Sci Technology
The Katadyn Drip filters meet the USEPA Guide Standard and Protocol for Testing Microbiological Water Purifiers for 6 log bacteria and 4 log cyst removal.
No backflushing needed.
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