Hi All, These toilets - we have had two for four years and live aboard full time and they have not failed us until now. However one of them sounds terrible and is challenged especially during dry flush but in general as well. Intake sea water is fine so no pump probkem. Sounds like the onboard macerator but that's just a guess. My plan is to perform a 45 minute acid wash (we also have electroscan - so this is normal maintenance) and hope that something foreign is lodged in the macerator that responds to the acid treatment. If that doesn't work does anyone have an idea? Thanks. Jim M/Y Kokomo Hatteras 48 LRC Lying Rodney Bay Marina Rodney Bay, St. Lucia, W.I Jim Felds, mobile