Disconnect the water supply line, remove the bolts securing the tank and lift it off the base. Remove the rubber gasket on the bottom of the tank, and slide a new gasket into place. Slide rubber washers over the ends of the bolts, and insert the bolts into the holes on the bottom of the tank. Slide a brass washer and hex nut over the ends of the bolts under the bottom of the tank, and place the tank on the base. Slide rubber washers, brass washers and wing nuts over the ends of the bolts beneath the base, and tighten the nuts. Reconnect the water supply and turn the shutoff valve counterclockwise. [links]