2. The water inlet pipeline shall be sealed reliably, must have special support, and cannot be hung on the water pump. For the inlet pipe equipped with bottom valve, the axis of the bottom valve shall be installed perpendicular to the horizontal plane as far as possible, and the included angle between the axis and the horizontal plane shall not be less than 45 °. When the water source is a channel, the bottom valve shall be more than 0.50m higher than the water bottom, and screening shall be added to prevent sundries from entering the pump.
3. The base of the machine and pump shall be horizontal and firmly connected with the foundation（water pump）. When the machine and pump are driven by belt, the tight edge of the belt is at the bottom, so the transmission efficiency is high, and the rotation direction of the water pump impeller shall be consistent with the direction indicated by the arrow; When coupling transmission is adopted, the machine and pump must be coaxial.