The purpose of this test is to select types of coagulant (alum) and also to estimate the optimal dose needed in removing the charged particles that occurred in raw water. Jar test is an experiment to understand the processes of coagulation, flocculation and sedimentation (AWWA, 2011).
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A. Inside the nose of a shallow well jet pump there is a nozzle and venturi pair. The nozzle blows water through the venturi which creates a pressure differential. Itâs this pressure differential that actually helps the pump build pressure.e recommend you use a pressure tank that is large enough so that every time the pump runs, it can run for a minimum of 1 minute, preferably 2 minutes. If you have a pump that puts out 10 GPM (gallons per minute) then we recommend a tank that has 20 gallons of drawdown.