aperture 54 of said sump 24 is located in said wall length 50 and above said bottom sump panel 48 said overflow tube 38 is connected to said overflow aperture 54 and allows said water stream 12 to flow out of said sump assembly 24 through said overflow drainage tube 42 and into said output drainage tube 38 please note that said overflow drainage tube 42 bypasses said output drain solenoid valve 76b and that said water steam 12 is therefor free to flow out of said drain 44 irrespective of the instantaneous closed or open state of said output drain solenoid valve 48 referring now to fig1 and 3 said mat frame 6 includes a base frame 66 a drip pan 67 a door 68 four wheel modules 70 with individual wheels 72 a vertical member assembly 74 a handle bar 75 said top beam 62 and said pair of side beams 64a amp 64b said wheels 72 may be solid or inflated are made of rubber plastic or other suitable materials known in the art and are individually and replaceably mounted within said wheel modules 70 and are thereby positioned to facilitate the manual movement of said mat frame 6 within a substantively horizontal plane said wheel modules 70 are semi permanently attached to said base frame 66 said wheel modules 70 and said wheels 72 enable said mat frame 6 to be easily removed out of and away from said enclosure 4 whereby said mat frame 6 may be rolled towards said mat 16 this easy mobility of said mat frame.