Toto TMT1NNC-32 Toilet Flushometer Valve, 1.6 Gpf, Exposed, 1-1/2-Inch Vacuum Breaker, Polished Chrome Piston Advantage: Solid bronze piston valve, only one moving part, Positive Seal: No warpage or mis-seals Self Cleaning Debris Screen: No clogging, no debris, No valve resetting after water pressure loss No Scheduled Maintenance: Reduce call backs, no regular diaphragm replacement Consistent Performance: Works with low(15psi) or high(100psi) water pressures Easy Retrofit: Standard size, replaces most flush valves, ADA Compliant