The seat height of a water closet above the finish floor shall be 430 mm (17″) minimum and 485 mm (19″) maximum measured to the top of the seat. Seats shall not be sprung to return to a lifted position.
604.6 Flush Controls.
Flush controls shall be hand operated or automatic. Hand operated flush controls shall comply with 309. Flush controls shall be located on the open side of the water closet except in ambulatory accessible compartments complying with 604.8.2.