tank 22 by means of a third opening 190 in the side wall 26 of the storage tank 22 and is sealed by a third seal 192 such as via weldment to prevent leakage of water through the tank 22 a reserve supply valve 194 is connected to the reserve supply means 188 and has a water level sensor such as a second float 196 attached to the reserve supply valve 194 in a preferred embodiment the supply means 188 has an outlet 198 located above the water level of the tank 22 the collector 102 of fig3 and 4 may be secured to the top 104 of the floor 82 of the bathtub 80 by means of adhesive 200 as shown in fig6 and 8 referring to fig6 a collector 202 has an opening 220 which is larger than the floor drain 84 referring to fig7 the collector 202 has a bottom ring 222 which has an inside diameter 224 and an outside diameter 226 an upstanding vertical wall 230 extends upwardly from the inner diameter 224 of the bottom ring 222 of the collector 202 the vertical wall 230 has an upper edge 232 a tapered cylindrical wall 234 extends between the outside diameter 226 of the bottom ring 222 of the collector 202 to the upper edge 232 of the vertical wall 230 of the collector 202 thereby forming a conduit 236 within the collector 202 an outlet means 240 is connected to the tapered cylindrical wall 234 the.