This is the washer that holds the water in the toilet cistern. If cistern empties slowly on its own this washer can be the problem.
Replacement Seal Washer Siamp Optima 49/ 50 Spare For The flush Valve 34490507
Black Toilet Flush Button Dual Flush Toilet Push Button Compatible with Optima 49 Adjustable Push Button Toilet Flush Replacement Part
For Siamp For Optima 49 Toilet Cistern Push Button | Single Flush Replacement Switch with Chrome Finish | Compatible with Standard and Raised Toilets | Silver ABS(B)
Dual Flush Toilet Button Compatible with Optima 49 – Chrome-Plated Replacement
3x Replacement Flush Valve Rubber Seal Washer For Siamp Optima 49/50 34490507
Toilet Button Flush Flushwise Replacement Compatible with Optima 49 Silver Dual
