This is an archival version of the original KnowledgePoint website.

Interactive features have been disabled and some pages and links have been removed.

Visit the new KnowledgePoint website at


Chemical dosing pump


Am off to Zambia to work on a water treatment plant for a hospital and orphanage complex. I am struggling to remember the name of a maker of the plastic water driven chemical dosing pumps - George Fischer?

Regards, Steve

3 Answers


I do not know what they currently have in terms of water treatment plant or technicians to operate it but I would suggest that it would be more appropriate to dose by hand with HTH chlorine that is readily available in Zambia.




I've used these in a number of places, but don't know what brand they were.

A number of manufacturers make water driven dosing pumps - (US Plastic Corp makes the DEMA MixRite dosing pump - the same pump is also sold as the Meditron - flow rates up to 0.7l/s). Dosmatic makes the Minidos (up to 0.75l/s). Obviously you could use several in parallel to get higher flow rates.




I see that John Cosgrave has already provided a couple of leads in his reply.

You will find a few others on page 39 of the WELL report 'Chlorinating small water supplies - a review of gravity-powered and water-powered chlorinators.' found at although these contacts relate to 2001.

In 2005 a student at WEDC did some laboratory tests on a Dosatron proportional doser, a venturi system from Portacel and a float operated system from Wallace and Tiernan (although they did not at that time publicise this system as being available).