Self-priming water pumps for deep suctions up to mt. 35 to be used in case of important water level gaps. Suitable to drain water from wells and in domestic fittings by small and medium-sized tanks. Before installing the pump verify that all pipes (iron, plastic, or rubber) are clean inside so to avoid any obstruction to the ejector nozzle. At the foot of the ejector must be installed a foot valve or a check valve. Installed the pump, fill completely both pipes and pump body with clean water. To preserve an efficient priming it is necessary a certain pression in the circuit, therefore it is recommended to install a membrane tank at the delivery of the pump.