---
product_id: 451451710
title: "Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507"
brand: "taps2traps"
price: "$23"
currency: NZD
in_stock: true
reviews_count: 8
category: "Taps2 Traps"
url: https://www.desertcart.nz/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima
store_origin: NZ
region: New Zealand
---

# Stops slow leaks instantly Durable, high-quality rubber Precision 7.1cm diameter fit Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507

**Brand:** taps2traps
**Price:** $23
**Availability:** ✅ In Stock

## Summary

> 🚽 Seal the deal on leaks — upgrade your flush game now!

## Quick Answers

- **What is this?** Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507 by taps2traps
- **How much does it cost?** $23 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima)

## Best For

- taps2traps enthusiasts

## Why This Product

- Trusted taps2traps brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit Precision:** Designed specifically for Siamp Optima 49 & 50 models with exact 4.3cm internal diameter.
- • **Effortless DIY Upgrade:** Easy to install replacement that transforms your toilet’s performance in minutes.
- • **Leak-Proof Seal Mastery:** Engineered to halt annoying slow cistern leaks, saving water and money.
- • **Eco-Friendly Water Saver:** Stops constant water flow, reducing waste and lowering your utility bills.
- • **Durability Meets Efficiency:** Premium rubber construction ensures long-lasting, reliable sealing power.

## Overview

This replacement rubber flush valve seal washer is tailored for Siamp Optima 49 & 50 toilets, featuring a 7.1cm external diameter and 4.3cm internal diameter. Crafted from durable rubber, it effectively stops slow leaks by providing a tight, reliable seal, is easy to install, and helps conserve water by preventing constant cistern drainage.

## Description

REPLACEMENT SEAL FOR SIAMP OPTIMA 49 & 50 This is the washer that holds the water in the toilet cistern. If cistern empties slowly on its own this washer can be the problem. Washer is fatter in the middle than at the edges Internal diameter 4.3cm - external diameter 7.1cm

Review: Perfect replacement - Perfect replacement seal. Good quality, easy to fit. Stopped water letting through immediately
Review: Perfect fit - Had an annoying constant water flow in my toilet cistern and this replacement seal was perfect for the job. Easy enough to swap out with the original seal which had clear sign of wear. Job done.

## Features

- rubber flush valve sealing washer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B3834LQD |
| Assembled Diameter | 71 Millimetres |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 20,827 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Tap & Valve Washers |
| Certification | CE |
| Customer Reviews | 4.6 4.6 out of 5 stars (274) |
| Cutting Diameter | 71 Millimetres |
| Date First Available | 2 July 2021 |
| Item Weight | 10 g |
| Item model number | 0735203234951 |
| Manufacturer | Taps2Traps |
| Material | Rubber |
| Number of Pieces | 1 |
| Size | 4.3cm (Internal) - 7.1cm (External) |

## Product Details

- **Brand:** Taps2Traps
- **Exterior finish:** Rubber
- **Inlet connection size:** 1.69 Inches
- **Inlet connection type:** Compression
- **Manufacturer:** Taps2Traps
- **Material:** Rubber
- **Number of ports:** 2
- **Outlet connection size:** 1.69 Inches
- **Outlet connection type:** Compression
- **Specification met:** CE

## Images

![Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507 - Image 1](https://m.media-amazon.com/images/I/51EBYbcMClL.jpg)

## Questions & Answers

**Q: Looking for  seal that goes  between cistern and toilet  bowl**
A: This is not for that job, this is a flush valve washer for the mechanism that flushes the water though. You need a doughnut washer to seal between toilet pan and cistern.

**Q: is this compatible with roca single pull flushmpatible with roca**
A: No, it is for Siamp flush valves

**Q: Looking for Beta valve cistern washer**
A: sorry, we do not stock one, this is for Siamp Valves only

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect replacement
*by A***R on 2 July 2025*

Perfect replacement seal. Good quality, easy to fit. Stopped water letting through immediately

### ⭐⭐⭐⭐⭐ Perfect fit
*by B***N on 9 August 2025*

Had an annoying constant water flow in my toilet cistern and this replacement seal was perfect for the job. Easy enough to swap out with the original seal which had clear sign of wear. Job done.

### ⭐⭐⭐⭐ Good product
*by D***D on 4 October 2022*

Good prodcut works and fits well

## Frequently Bought Together

- Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507
- Pack of 3 Replacement Rubber Ball Valve Washers - Fits All Siamp Fill Valves
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**Shop now:** [https://www.desertcart.nz/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima](https://www.desertcart.nz/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-07*