HomeToiletsHow To Raise Water Level In Toto Toilet Bowl How To Raise Water Level In Toto Toilet Bowl Flush the toilet after each adjustment. Also make sure that the water level is at least an inch below the C-L (critical level) marked on the fill valve. You can adjust the height of many valves to raise or lower the C-L. Related Olympic Diving Toilet Sam’s Club Toilet Paper Price How To Set A Toilet Bowl How To Clean Stained Toilet Bowl Uk Add a Comment Cancel reply Your email address will not be published. Required fields are marked *Name Email Website This site uses Akismet to reduce spam. Learn how your comment data is processed.