BATHTUB SYSTEM

PURPOSE:To prevent beads from flowing out of a bathtub during back washing by the arrangement such that a control means has a function to automatically make an air feed means inoperative after the completion of a jet mode, allowing thereby a back washing mode to be performed for a predetermined period of time. CONSTITUTION:A sequence controller 28a controls a three-way valve 13 so that a piping 12a communicates with a piping 14 and also controls a second three-way valve 17 so that a piping 16 communicates with a combined piping 18 and then actuates a circulation pump 8. Then, the water W0 in a bathtub is sucked from a suction port 2 into an upstream circulation piping 7c through the sucking force of the pump 8, whereby the bathtub water flows from the pump 8 to a branch 7d, where the water is divided into downstream circulation pipings 7a, 7b and a branched piping 10. A part of the divided water reaches a filter tank 15, wherein dirty matters in the water are removed by means of a group of beads 15c. As a result, beads are prevented from flowing out.