Sloan Regal Manual Flush Valve Model 116 - 1.6 XL Flushometer, Item Number: 2VEC9. Standard Segment Diaphragm, 1.6 GPF (gallons per flush) For Toilet, 1-1/2" Spud Size, 27" Rough-in, Chrome Finish, Single Flush, 25-100psi, XL variation.