Where is the gasket that is failing on the Toto fill valve? I have pulled out my in wall fill valve but am not sure which part I need to replace.

Thanks for your question, I was confused as well. There is another gasket on the TOTO fill valve at the water inlet side (the one visible when you remove the yellow compression clip). It is NOT this gasket. What you do is to gently unsnap the top blue cover on the fill valve, unsnap the levers, then give the white plastic disc a turn with pliers. Go easy. The black rubber diaphragm on the TOTO pulls out and you can discard it and replace with the silicone one from the Geberit assembly. The plastic pieces on the Geberit are of no use. Unless the thing is cracked, the TOTO assembly will work perfectly!

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Description

🔧 Seal the deal with Geberit’s blue precision!

CERTIFIED QUALITY ASSURANCE - Meets CE, EN 1074, and DIN 2508 standards—trusted by professionals worldwide.
COMPACT LIGHTWEIGHT DESIGN - At just 0.7 ounces and 4x2x2 inches, installation is hassle-free and space-efficient.
PREMIUM RUBBER PLASTIC MATERIALS - Combines flexibility and durability for long-lasting plumbing reliability.
TAILORED FIT FOR GEBERIT IMPULS 380 - Engineered exclusively for side entry fill valves, ensuring leak-proof performance.
UNIVERSAL COMPATIBILITY WITH CONCEALED CISTERNS - Perfect for UP300, UP200, and AP123 frames—upgrade your hidden plumbing with confidence.

The Geberit G240771001 Seal Kit is a high-quality replacement diaphragm assembly designed specifically for the Impuls380 side fill valve. Crafted from durable rubber and plastic, it fits concealed frame cisterns like UP300, UP200, and AP123. Compact and lightweight, this seal kit meets rigorous European standards and comes backed by a 25-year warranty, making it the go-to choice for professional-grade plumbing maintenance.

Specifications

Material	Rubber
Brand	Geberit
Item dimensions L x W x H	4 x 2 x 2 inches
Exterior Finish	Plastic,Rubber
Inlet Connection Size	2 Inches
Inlet Connection Type	side entry
Outlet Connection Type	side entry
Number of Ports	2
Outlet Connection Size	2 Inches
Specification Met	CE, EN 1074, DIN 2508
Valve Type	Side Fill Valve
Global Trade Identification Number	04025416150657, 08033146425132
Manufacturer	Geberit
UPC	733169623185
Part Number	240.771.00.1
Item Weight	0.704 ounces
Product Dimensions	4 x 2 x 2 inches
Item model number	240.771.00.1
Is Discontinued By Manufacturer	No
Color	Blue
Item Package Quantity	1
Number Of Pieces	1
Usage	Inside
Included Components	Product Only
Batteries Included?	No
Batteries Required?	No
Warranty Description	25 years

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