Grohe Adagio Single Flush Valve Discharge Piston & Base Sealing Washer 43544000
If your Grohe Adagio flush valve won't seal properly and is constantly passing water into the toilet pan but there is no sign of an inlet valve failure, it could very well be that the base sealing washer and discharge piston need to be changed. Overtime as the flush valve is opened and closed, small imperfections tend to occur in the surface of the rubber washer causing the washer to be warped and not providing an adequate seal. Many make the mistake of purchasing a full replacement flush valve at the first sign of any issue, replacing just this washer and discharge piston may save you a lot time and money in the long-term. We advise purchasing a couple of these washers and discharge pistons at a time so you've got one readily available in the event that the washer fails again in future.
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