Installed for two sinks by handyman and both leaked. Called Plummer and he tried to repair but still leaks. No one could get them not to leak.  On top of that our renovation took longer than expected so by the time they were installed and defective we couldn’t return due to over 30 days.  Now battling with manufacturers. Have 3rd one which can’t be returned and don’t even want to go through expense of trying it out.  Couldn’t replace gaskets because they are metric and not American Standard.  Don’t waste your money we are way in the hole between stuck with product purchasing new ones and paying for plumbers.