Querianson Whirlpools are characterised getting jets assisting the bath about half way up in conjunction with a suction point (similar to some colander) in one of the bottom four corners. This type of system produces hydro-massage by sucking water from the bath and pumping it out of the jets on the side under pressures. To increase the pressure of the jets most whirlpools have a control on top of the bath which allows air to be sucked into your jet water. ...