just wondering if this is a universal size & will fit any macdee round syphon as all i know in our loo is a macdee round syphon but not the size

Best thing to do is unscrew the diaphragm side, slide it off and pop out the diaphragm (takes 2 minutes - good YouTube videos if you need) then measure the diaphragm. That's what I did. They seem to be standard size either round or rectangular. My loo is from the 90s and it is the same fit

Macdee Metro Round Toilet Cistern Siphon Diaphragm Washer Repair Wc

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Description

🚽 Upgrade your flush game—don’t let a weak flush hold you back!

EASY DIY UPGRADE - Simple installation means no plumber needed—get your toilet flushing like new and impress your guests with your savvy home maintenance skills.
INSTANT FLUSH REVIVAL - Replace your worn-out siphon washer to restore powerful flush performance and eliminate frustrating weak flushes.
LIGHTWEIGHT DURABLE - At just 10g, this washer is built to last without adding bulk, ensuring long-term reliability in your bathroom setup.
OPTIMIZED HOLE DESIGN - Dual offset holes (13mm & 14mm) plus micro 2mm holes guarantee flawless suction and efficient flushing every time.
PRECISION ENGINEERED FIT - 120mm diameter ensures seamless replacement and perfect compatibility with Macdee Metro round cisterns.

The Macdee Metro Round Toilet Cistern Siphon Diaphragm Washer is a precision replacement part designed to restore optimal flushing performance. Featuring a 120mm diameter with offset holes sized 13mm, 14mm, and 2mm, it ensures perfect fit and water flow for Macdee Metro round cisterns. Lightweight and easy to install, this washer solves suction loss issues, making it an essential upgrade for efficient bathroom maintenance.

Reviews

A**R

Easy fix

Easy to fit and has been working fine.

6.04.2025

K**N

Life saver and great service

My toilet stopped flushing and rather than pay for the expense of getting a plumber I tried to identify the problem myself and identified this as the part I needed. Ordered on Sunday and it arrived on the Tuesday and fitted within half an hour. Works well. Great service.

14.04.2022

T**4

Easy to install

Exactly what i needed to fix the toilet. Easy to install

31.05.2026

D**T

Value for money

Excellent product easy to fit , saves having to buy complete new system money saver

30.08.2024

K**D

So easy and yet so cheap.

Great price, easy to replace better than replacing the flush unit.

28.08.2025

D**R

Fixed my toilet for virtually no cost!

This 'washer' fixed our flushing toilet problems. I am no plumber but I found out a hell of a lot about toilets and their flushing mechanisms. Thanks for your cheap and durable product. Saved me a fortune in plumbers costs (apologies to all you plumbers out there). Thanks people. Regards David Mellor, London

2.04.2020

T**6

Syphon diaphragm

The best syphon diaphragm I have ever used and also because of the syphon design I do not have to separate cistern and pan Win win for me

12.10.2024

R**B

Perfect replacement part.

Replacement part and all working fine.

25.02.2024

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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Manufacturer	Macdee
Part Number	100435
Package Dimensions	14.3 x 14 x 0.01 cm; 10 g
Item model number	100435
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	10 g

Macdee Metro Round Toilet Cistern Siphon Diaphragm Washer Repair WC

Description

Specifications

Reviews

Common Questions