Whirlpools are characterised with jets along the side of the bath about half way up including a suction point (similar to be able to colander) within the bottom crevices. This type of system produces hydro-massage by sucking water from the bath and pumping it among the jets quietly under the amount of pressure. To increase the pressure from the jets most whirlpools possess a control on top of the bath which allows air to become sucked in to the jet of water. Wishing your yours topic . as you ...