This is a Standard Gulper. It operates like a borehole pump or a tyre pump in reverse. At the bottom is a one way butterfly valve and on the plunging rod is another one way butterfly valve. You push the pump through the hole in the pit, pump and sludge rises up to the outlet. It's a simple design but it's currently one of the most reliable sludge pumps in the world. It only costs a couple of hundred dollars, it's fully manufactured in Uganda and the SAAB Team are using it to develop businesses that empty pits. So if a persons pit latrine is full they can have it partially emptied and continue using it.
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