CTI Water Chlorinator

Target SDGs

Market Suggested Retail Price

$200.00

Target Users (Target Impact Group)

Community

Distributors / Implementing Organizations

CTI is partners with Emerging Opportunities for Sustainability (EOS) International and with Self Help International (SHI) in Nicaragua.

Competitive Landscape

Direct competitors include Lotus Water Chlorine Dosing Device and Zimba automatic chlorine dispenser.

Manufacturing/Building Method

Chlorinators are manufactured locally from PVC pipe, fittings, and ¼ inch (6 mm) sheet PVC. The system is constructed with simple tools and assembled with standard PVC cement and stainless steel screws or PVC pegs. The body of the unit is a 4 inch (100 mm) PVC tee, with a 9 cm nipple and coupling on each end. A 4 inch (100 mm) riser, 30 cm long, is fitted into the branch of the tee, and is closed on top by a cap. More detail can be found in the information manual.

Intellectural Property Type

Open-source

User Provision Model

In Nicaragua, CTI and partners train villagers to install and maintain the water chlorinator. They provide sanitation education in partnership with the health ministry and identify dedicated village volunteers to replace chlorine and maintain systems. CTI maintains chlorine banks with local partners to restock systems and periodically monitor their maintenance.

Distributions to Date Status

Chlorinators have been installed in more than 600 rural communities in Nicaragua, providing safe water to more than 340,000 villagers.

Design Specifications

The chlorinator must be installed on: 1) a gravity fed system, 2) where influent water with >10 ntu is filtered before passing through the chlorinator, and 3) where the flow through the chlorinator is between 2 and 10 gpm (.13 and .63 liters/sec). The chlorinator is manufactured from: 1 4? x 4? PVC T, 21? of 4? PVC pipe, 2 4? couplings, 1 4? cap, 17? of 3? pvc pipe, 1.3 square feet of 1/4? PVC sheet a small container of PVC cement and 11 #4 x 1/2? stainless steel sheet metal screws.

Product Schematics

Technical Support

Formal water committees, called CAPS (Comite de Agua Potable y Saneamiento, or Potable Water and Sanitation Committee) are trained in operation and maintenance, including free chlorine residual testing.

Replacement Components

To keep a constant supply of chlorine tablets within short distance from local villages, CTI has established more than 20 regional chlorine banks that store small inventories of tablets for sale to local villages. These banks keep records indicating which communities are replacing their chlorine.

Lifecycle

CTI recommends estimating chlorine usage at two 140 g tablets per week. This ranges greatly depending on the water flow rate and number of operating hours.

Manufacturer Specified Performance Parameters

For an average ground water supply the maximum flow that one chlorinator can treat (including bypassed flow) is about 20 gpm (about 1.3 liters/sec).

Vetted Performance Status

CTI carried out an evaluation in Nicaragua.

Safety

Unknown

Complementary Technical Systems

Water should be stored in a safe storage container with a lid and tap to preserve water quality.

Academic Research and References

Compliance with regulations

Unknown.

Evaluation methods

A study by CTI was conducted during March – June 2014 in 37 rural communities located within the departments of Matagalpa and Jinotega, and in villages with a typical, closed, gravity-fed community water system. Water samples were collected and analyzed for presence of bacteria. The study concluded that chlorination of rural water sources through the CTI-8 significantly reduces bacterial contamination of drinking water.

Other Information

Installed project video and Construction video.