Final answer:
The pump suction should be positioned above the bottom of the tank to avoid drawing in sediment. Sediment buildup in the tank is managed through regular maintenance and cleaning.
Step-by-step explanation:
Positioning the pump suction above the bottom of the tank is important because it helps prevent the pump from drawing in sediment and debris that may have settled at the bottom. This ensures that the water being pumped is clean and free from contaminants. Sediment buildup in the tank is typically managed through regular maintenance and cleaning. The tank may be periodically emptied or the sediment may be removed using specialized equipment.