If your Grohe Adagio push button isn't producing an adequate amount of pressure to lift your flush valve, it's more than likely that you'll need to replace this bellows. Over time the bellows may develop small fractures in it's surface as it's constantly expanding and contracting, therefore not keeping the air contained and not producing enough pressure to lift the flush valve assembly. black air bellows are 35mm dia at the base will fit Grohe Adagio 6L Cistern - 37762 SH0 Grohe Adagio 6L Cistern - 37945 SH0

Brand Name	Grohe
Item Group ID	2722
Shipping Weight	0.00kg
Shipping Service	Small Delivery - Free
GTIN	4005176885419