Updated on December 13, 2023

·

Created on September 21, 2018

Stéfani Filtro Flex

Brazilian-made Stéfani Flex by Cerâmica Stéfani is a household silver-impregnated water filter with 6 liters capacity and one or two Stéfani filter candles.

Developed By
  1. Ceramica Stefani Flex
Tested By
  • INMETRO
  • Instituto Falcão Bauer
Content Partners
  1. Centre for Affordable Water and Sanitation Technologies (CAWST)

Author

Product Description

Brazilian-made Filtro Flex by Cerâmica Stéfani is a household silver-impregnated water filter with 6 liters capacity and one or two Stéfani Sterilizing filter candles. The filter candles contain microporous ceramic wall for particles removal, granular activated carbon for chlorine, unpleasant tastes and odor removal, and colloidal silver for disinfection. The Stéfani filter candles are also compatible with all marketed gravity water filters in Brazil and many others worldwide according to the Path C1 Common Interface.

Target SDGs

SDG 6: Clean Water and Sanitation

SDG 1: No Poverty

Market Suggested Retail Price

$45.00

Target Users (Target Impact Group)

Household

Distributors / Implementing Organizations

Online retailers, Brazilian stores, many distributors worldwide

Competitive Landscape

Manufacturing/Building Method

Flex Water Filter is manufactured in Brazil from food-safe plastics. It ships disassembled and the user can follow the video tutorial on how to assemble it.

Intellectural Property Type

Trademark

User Provision Model

Users can purchase Filtro Flex and replacement filter candles in Brazilian homewares stores, or by contacting the manufacturer for the appropriate international distributor.

Distributions to Date Status

6.2 million Stéfani Sterilizing filter cartridges and 170,000 Flex Water Filter units have been sold since 2010. <sup>Interview with Representative</sup>

Type of filter

Ceramic candle filter

Primary material of construction

Ceramic with colloidal silver

Additives

None

Manufacturer-specified flow rate (L/hr)

0.5 – 3 liters

Bacteria reduction

2 log

Virus reduction

Unknown

Protozoa reduction

Unknown

Heavy metals and/or arsenic reduction

Unknown

Maximum recommended influent turbidity level (NTU)

Unknown

Effluent turbidity levels (NTU)

0 NTU. The Stéfani filter cartridges remove all particles between ? 5 up to < 15 ?m.

Maintenance schedule

Clean filter candles with water and a scrub pad when flow is reduced

Manufacturer-specified lifetime volume (L)

500 liters/cartridge

Safe water storage integration

6 liters

Design Specifications

The Stéfani Filtro Flex weighs 1 kg and is 46 cm tall by 24 cm in diameter. It has a capacity of 8L of safe water storage and consists of one or two filter candles with float valves for greater capacity.

Product Schematics

Technical Support

Video tutorials in English and Portuguese are available to assist users in assembling the new filter when it is unpacked and for cleaning and replacement of the filter cartridges.

Replacement Components

Users can purchase replacement Stéfani filter cartridges for around $4 or from housewares stores.

Lifecycle

The filter candles must be replaced after filtering 500 L each or after 6 months, whichever is sooner. The plastic filter housing can be used for many years with proper cleaning and keeping it out of sunlight.

Manufacturer Specified Performance Parameters

The Stéfani filter cartridges remove all particles between ? 5 up to < 15 ?m, ? 75% of free chlorine (in upgraded Sterilizing filter version), and 2 log reduction of E. coli. All Stéfani filter cartridges meet INMETRO (National Institute of Metrology, Quality and Technology – from Brazil) criteria for chemicals and particulate. Manufacturer provided documentation: Características dos filtros Stéfani - Inglês - 21-08-2017

Vetted Performance Status

The Cerâmica Stéfani water filters are certified by the regulatory agency of the government of Brazil, NMETRO to provide clean drinking water.

Safety

No known safety risks.

Complementary Technical Systems

None.

Academic Research and References

Social Adoption of a Non-Conventional Technology for the Treatment of Water in Housing, Vereda El Motilón Pasto (Nariño)
Edwin Alfred Martínez Jaramillo and Nelson Orlando Narvaez Mora (2017)

Comparative Study of Homemade Filtration Systems for the Treatment of Safe Drinking Water
Andrea Pérez Vidal, Jaime Díaz Gómez, Ginna Paola González Rojas (2014)

“Water Purifier: Find Promotions and the Lowest Price At,” Zoom. Available: https://www.zoom.com.br/purificador-agua-filtro/filtro-stefani-cristal 

Goal 6. (n.d.). Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6 

C. S. S. A., “Cerâmica stéfani S.a. – assembling of the Stéfani Gravity Water Filters,” 25-Sep-2017. Available: https://www.youtube.com/watch?v=H4iUp-0V0Jw

“Cerâmica Stéfani,” Com.br. Available: https://ceramicastefani.com.br/contato 

“Stefani Ceramics,” Com.br. Available: https://www.ceramicastefani.com.br/detalhe/19 

Engineeringforchange.org. Available: https://www.engineeringforchange.org/wp-content/uploads/2018/08/Instruction-Manual-St%C3%A9fani-Filters-English-12-12-2017.pdf

C. S. S. A., “Cerâmica stéfani S.a. – assembling of the Stéfani Gravity Water Filters,” 25-Sep-2017. Available: https://www.youtube.com/watch?v=H4iUp-0V0Jw 

C. S. S. A., “Cerâmica stéfani S.a. – use and Maintenance of the Stéfani Gravity Water Filters,” 10-Oct-2017. Available: https://www.youtube.com/watch?v=4Or-y8O63sM

C. S. S. A., “Cerâmica Stéfani S.a. – Sterilizing Cartridge filtration (Triple Action) in Stéfani filters,” 26-May-2017. Available: https://www.youtube.com/watch?v=qiWIWbZXCnQ

Engineeringforchange.org. Available: https://www.engineeringforchange.org/wp-content/uploads/2018/09/02578-1g1_2017.pdf

Engineeringforchange.org. Available: https://www.engineeringforchange.org/wp-content/uploads/2018/08/Caracter%C3%ADsticas-dos-filtros-St%C3%A9fani-Ingl%C3%AAs-21-08-2017.pdf

“Certified Products,” Gov.br. Available: http://www.inmetro.gov.br/prodcert/certificados/busca.asp?

Compliance with regulations

The Cerâmica Stéfani water filters are certified by the regulatory agency of the government of Brazil, INMETRO to provide clean drinking water.

Evaluation methods

Water quality testing post-filtration in a laboratory environment.

Other Information

None

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