If your toilet keeps running and doesn’t shut off, it could be time to replace the flapper valve. You can go to a local home store plumbing department and find a flapper replacement kit. Some of the kits have a new rubber seal that you stick over the old hole in the tank. You simply shut off the water supply to the toilet. The water supply valve is usually just under the toilet tank about 8 inches from the floor. Turn the water supply off. Then flush the toilet. There may be a little water left in the toilet tank. Use a sponge or a rag to mop up the remaining water in the tank. Follow the directions, install the new flapper. Turn on the water supply again and flush the toilet a few times to check for proper operation. If DIY is not your forte, call Deer Valley Plumbing Contractors Inc. at 623-582-1740 and we will take care of this for you.