indiacarez.com Whirlpools are characterised by having jets tubing the bath about midway up rrncluding a suction point (similar to a colander) at a bottom handles. This type of system produces hydro-massage by sucking water from the bath and pumping it out of the jets on the side under work. To increase the pressure from the jets most whirlpools have a control on the top of the bath which allows air in order to sucked in to the jet of water. ...