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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240.771.00.1 Seal Kit for Impuls380 Fill Valve

Product ID: 242504148

Details

Brand
Geberit
Exterior Finish
Plastic Rubber
Global Trade Identification Number
Inlet Connection Size
2 Inches
Inlet Connection Type
Flange
Item dimensions L x W x H
10.2 x 5.1 x

⏳25-year manufacturer warranty

⚙️Precision-engineered diaphragm assembly

🛠️Universal fit for UP300, UP200 & AP123 frames

R888

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Upgrade your flush game with precision and peace of mind!

PRECISION ENGINEERING - Flanged 2-inch inlet/outlet connections ensure leak-proof performance
SEAMLESS COMPATIBILITY - Designed specifically for Impuls380 side fill valves in popular concealed cisterns
DURABILITY YOU CAN TRUST - Robust plastic and rubber finish built to last decades
CERTIFIED QUALITY ASSURANCE - Meets CE, EN 1074, and DIN 2508 standards for plumbing excellence
EFFORTLESS MAINTENANCE UPGRADE - Replace just the seal kit, avoid costly full valve swaps

The Geberit 240.771.00.1 Seal Kit is a precision diaphragm assembly designed for the Impuls380 side fill valve, compatible with UP300, UP200, and AP123 concealed frame cisterns. Featuring durable plastic and rubber construction, 2-inch flanged inlet/outlet connections, and backed by a 25-year warranty, this seal kit offers a cost-effective, certified plumbing repair solution trusted by professionals.

Specifications

ASIN	B006P3OBC4
Best Sellers Rank	#290,188 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #220 in Fillers, Adhesives & Sealants
Brand	Geberit
Brand Name	Geberit
Connector Type	Flanged
Country of Publication	USA
Customer Reviews	4.8 out of 5 stars 1,255 Reviews
Exterior Finish	Plastic, Rubber
Global Trade Identification Number	04025416150657, 08033146425132
Included Components	1
Inlet Connection Size	2 Inches
Inlet Connection Type	Flange
Item Dimensions	10.2 x 5.1 x 5.1 Centimeters
Item Type Name	Toilets and Bidets
Item Weight	0.02 Kilograms
Item dimensions L x W x H	10.2 x 5.1 x 5.1 Centimeters
Manufacturer	Geberit
Manufacturer Part Number	240.771.00.1
Manufacturer Warranty Description	25 years
Model Number	240.771.00.1
Number of Items	1
Number of Packs	1
Number of Pieces	1
Number of Ports	2
Outlet Connection Size	2 Inches
Outlet Connection Type	Flange
Size	Standard
Specification Met	CE, EN 1074, DIN 2508
UPC	733169623185
Unit Count	1.0 Count
Valve Type	Side Fill Valve

Reviews

S**N

Useful item

Very useful

19.10.2025

C**N

Ottimo

Ottimo prodotto, invece di comprare tutto lo scarico completo ho risolto orinando solo questo piccolo pezzo

6.09.2026

A**E

Wieder gute Lieferung

Passt alles prima 👌

11.03.2026

B**M

Flötter

Det var snabbt leverans och billig . Det var exakt samma sak som jag ville ha.

25.03.2023

J**F

Excellent

It was a perfect fit to my old system

5.05.2022

J**P

Justo lo que necesitaba, llego mas rápido de lo esperado

Justo lo que necesitaba, llego mas rápido de lo esperado , no fue necesario cambiar toda la pieza solo este producto,.

26.07.2018

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R888

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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