how much water is needed to flush a toilet
The standard is 1.6 gallons for new toilets. They do make power flush toilets that have an air system added to them but use the same amount of water. If you feel you need a toilet that will flush 16 golf balls, you probably need a doctor more than a plumber. sensible_man Â· 10 years ago.
The old toilets required about 5 gallons,the need to conserve water has them down to the about 1.5 or just a bit more. Some of the earlier models of the water savers only had a 11/2 inch outlet not to good,I wouldn't settle for no less than 2 inches. petethen2 Â· 10 years ago.