1.Check for rotation arrows. Some pumps have internal porting or other features which require the pump only operate in one direction. Bidirectional or reversible pumps, will not have an arrow; continue to step 2.

2.Check for a Relief Valve. The relief valve cap will “point” to the suction port of the pump. It is important the relieve valve orientation match the pump rotation to prevent dangerously high pressures.

3.Check the suction piping is connected to the suction port of the pump. If the pump does not have a relief valve or required rotation, so the pump is bi-directional, either port can be used as the suction port.

4.Once you have identified the suction port of the pump, find the “long” way around from the suction port to the discharge port. This longer path will be in the direction of correct rotation.