The overview is suitable for the selection of the correct size of Unilift AP35 pumps used in stationary applications.

To ensure that the discharge pipe is self-cleaning, the calculation of the pipe lengths is based on:
• the use of steel pipes
• a minimum flow velocity through the vertical discharge pipe (1½") of 1 m/s
• a minimum flow velocity through the horizontal discharge pipe (2") of 0.7 m/s.

Please note:
The overview is only intended as a guide. Grundfos is not liable for any faulty installations based on the overview.

If the non-return valve is used, the pressure drop in the valve is 0.2 m head, which is to be subtracted from the vertical pipe lengths.

The vertical height of the discharge pipe should be measured from the pump stop level.