Geberit mechanism seal Ø 52x19 | Ref 241.291.00.1 | Sigma 8 built-in toilets from 2016, UP720 and Delta 8

I have listed here the 2 symptoms requiring replacement of theGeberit sealing gasket:

1st symptom:
Small bubbles form on the surface of the gasket. These bubbles may resemble a small blister on your hand. Their random placement impairs the seal and causes a leak into the toilet bowl. This phenomenon is a defect. The only solution: replace the gasket.

2nd symptom:
The gasket is whitish. The true "color" is transparent/opaque, but over time and with wear, the gasket turns white. This condition is often accompanied by a ring of limescale that interferes with the seal. Because the gasket's surface is damaged, limescale builds up more quickly, causing more regular leaks in the bowl. I recommend replacing it if you find it in this condition.

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This Geberit seal is installed in concealed cisterns (wall-hung toilets): Sigma 8 after 2016, UP720 - Delta 8 - UP700 - Unica

Manufacturer reference:241.291.00.1
Outer/Inner Diameter:52 mm x 19 mm