or combination (air and water jets) walk-in tubs start closer to $12,000 and can cost up to $20,000 or more if you add a shower unit, Telymonde said. Walk-in tub features that can increase the ...

A valve diverter then directs the heated water through the jets. Water pumps power the hot tub jets. Like car motors, spa pump motors have horsepower, which describes how much power the motor can ...