The priming pot also known as priming chamber is
used for priming the pump in the event of negative
suction condition. This avoids the need of foot
valve and frequent priming of the pump.
The priming pot is connected to the pump suction
filled with liquid and sealed airtight before initial
start up. After starting the pump, the liquid from
priming pot is drawn into the pump and partial
vacuum, is created in the pot. Due to partial
vacuum, liquid rises in the suction pipe and pushes
the air into the pot. This action fills the suction pipe
resulting in priming. The air accumulated in the
priming pot mixes with liquid and is driven through
discharge of the pump. Thus, the priming pot is
filled and is ready again for the next start up.