Horizontal pumps can be retrofitted with a priming pot to provide self-priming capability. The priming pot is installed between the suction pipe and the pump.

Operating principle:
A priming pot filled with liquid is arranged between the pump and the suction pipe. During the startup phase, the pump draws the liquid from the priming pot thereby creating a vacuum in the priming pot.

The liquid in the tank to be emptied is under atmospheric pressure; vented system. Under the action of the pressure differential, the liquid is forced into the priming pot. As a result, the suction line is vented and the pump can lift the liquid from a level well below that of the pump.

Technical specification
The effective volume of the priming pot must exceed the filling volume of the suction line by a factor of 1.5 to 2.0.
Priming pots are available with effective volumes of 10 to 26 l.
Standard construction material of priming pots:
polypropylene (PP); other materials can be supplied on request.