The 405006 Caroma Outlet Valve Seal is one of the leading causes for a leaking Caroma Toilet (a.k.a. a phantom flush). A leaking flush valve is generally characterized by an occasional refilling of the tank without the unit being flushed.
This is very simple to explain.
The outlet valve seal is located on the bottom of the overflow tube. This tube lifts up when one of the top flush buttons are depressed. If for any reason the seal looses it shape, (wrinkled, cracked, torn, not seated right, etc...) the water will slowly leak out around the seal and into the toilet bowl. This will eventually drop the water level in the toilet tank until it triggers the fill valve to turn on. Once the water is refilled in the tank, the cycle will continue until the outlet valve seal is replaced.
Works with Hi-Flow Outlet Valves; 415042 , 415043 , 415047 & 415056
Works with Duo-Flow Outlet Valve; 414290
** This part only replaces the older square style outlet valve seals. This will not work on the M5 (Round) Valves.
***Valve Pictured is for Reference only and is not included.