is the water exhaust outlet 96 in the turbine housing 26 with this arrangement the accumulation of pressure and turbulence between the blades is minimized thereby assuring smooth transfer of the water 39 s momentum to the turbine 40 further it should be noted that the exhaust outlet 96 is downwardly directed to minimize splattering of the water out of the tub the provision of the openings 92 at the peripheral end of each of the blades 88 also functions to increase the time interval each of the blades 88 is exposed to the force of the water since the water passing through each of the openings 92 will impact against a preceding blade at least until the blade passes over the exhaust outlet 96 in fig4 the distribution of the water hole 64 in the brush plate 58 is illustrated it will be apparent however that other distributions of the holes 64 may be utilized in fig6 an alternate scrubbing device is shown and which includes a circular sponge 98 the back surface of the sponge 98 is covered with a thick adhesive layer 100 which is pressed into the dovetail slots 102 formed in the face of the brush plate 58 39 when the adhesive hardens it forms a secure bond over the entire surface of the sponge 98 with the face of the brush plate 58 39 as the adhesive is pressed into the dovetail slots 102 to fill the slots to form a secure anchor.