RIP Oscar Carlsson, designer of the Sholapur hand pump

The CO2balance team was saddened to learn recently of the passing of Oscar Carlsson, inventor of the Sholapur hand pump, who died in late January at the age of 89. Oscar designed the hand pump whilst managing the Sholapur Well Service in India in the 1970s.

Whilst Sholapur may not be a household name, the influence of the design on rural water access throughout the developing world has been astronomical. The India Mark II, the most widely used water hand pump in the world, is based on the Sholapur design. Over 6 million India Mark IIs are in operation in India and countless thousands more are in operation globally, guaranteeing safe water access to communities living in some of the most remote and challenging locations on the planet.

Oscar’s innovations included designing ball valves for the pump cylinder and a sand trap in the rising main to extend the life of the cup washers, amongst several innovations to improve the durability and longevity of the pumps. CO2balance is one of the many organisations whose work benefits from Oscar’s efforts, with the India Mark II being one of the most widely used pump models used in our borehole projects.

Oscar is remembered by his friend Ruper Talbot as “a rare being, blessed with out-of-the-box imagination and clever engineering skills that he translated into practical solutions to every day technical and social problems”. All of us at CO2balance extend our thoughts to Oscar’s family and friends and hope that many others will be inspired by him to bring practical and ingenious innovations to support livelihoods and protect the environment.

Featured image: an India Mark II hand pump repaired and maintained by CO2balance in Eritrea

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