*PLUMBERSSTOCK EXPERT* responded:
Hello there! Thank you for trusting PlumbersStock to answer your question under the Mansfield 705NS-Bone Toilet. There are a number of reasons why the water in your toilet is still running but here are few fixes that might work. 1) The overflow tube has a problem. Make sure that the fill tube sends water into the overflow tube. 2) Check the float. You need to adjust the float until the water shuts off at the proper level. 3) The flapper chain. Adjust the chain to leave a little slack with the flapper closed. Cut off the excess chain, leaving about an inch. 4) The flapper needs replacing. For toilet parts, feel free to visit PlumbersStock's Toilet Parts Page to find the necessary parts that will help you fix your toilet. We hope this helps. Have a great day!