--- product_id: 451451710 title: "Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507" brand: "taps2traps" price: "S$13" currency: SGD in_stock: true reviews_count: 8 category: "Taps2 Traps" url: https://www.desertcart.sg/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima store_origin: SG region: Singapore --- # Superior water-tight rubber seal Instant leak fix, DIY-friendly Precision fit for Siamp Optima 49 & 50 Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Optima 49 & 50 34490507 **Brand:** taps2traps **Price:** S$13 **Availability:** ✅ In Stock ## Summary > 🚽 Seal the deal on leaks—flush with confidence every time! ## 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?** S$13 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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 - • **Optimized Dimensions:** 4.3cm internal and 7.1cm external diameter for a snug, reliable fit that stops water wastage. - • **Trusted by Thousands:** Rated 4.5 stars with nearly 300 reviews, join the savvy pros who’ve upgraded their bathroom efficiency. - • **Perfect Compatibility:** Specifically engineered for Siamp Optima 49 & 50 models, ensuring flawless installation. - • **Quick & Easy Installation:** No plumbing expertise needed—fix your leaky toilet in minutes and avoid costly repairs. - • **Durable Rubber Construction:** Premium rubber material guarantees a long-lasting, watertight seal that prevents slow leaks. ## Overview This replacement rubber flush valve seal washer is designed exclusively for Siamp Optima 49 & 50 toilets. Its durable rubber construction and precise sizing (4.3cm internal, 7.1cm external diameter) ensure a perfect, leak-proof fit that stops slow cistern drainage. Easy to install and highly rated by users, it’s the smart, cost-effective fix for maintaining optimal toilet performance. ## 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: Instant fix - Instant fix for a leaky toilet. Unbelievably quick and easy to fit (and I'm terrible at DIY). Review: Was the exact thing I needed - Very good exactly what I needed ## Features - rubber flush valve sealing washer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B3834LQD | | Best Sellers Rank | 19,848 in DIY & Tools ( See Top 100 in DIY & Tools ) 23 in Tap & Valve Washers | | Brand | Taps2Traps | | Connector Type | Compression | | Country of Origin | China | | Customer Reviews | 4.5 out of 5 stars 292 Reviews | | Exterior Finish | Rubber | | Exterior finish | Rubber | | Inlet Connection Size | 1.69 Inches | | Inlet Connection Type | Compression | | Inlet connection size | 1.69 Inches | | Inlet connection type | Compression | | Manufacturer | Taps2Traps | | Material | Rubber | | Model Number | 0735203234951 | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Number of Ports | 2 | | Outlet Connection Size | 1.69 Inches | | Outlet Connection Type | Compression | | Outlet connection type | Compression | | Set Name | Single | | Size | 4.3cm (Internal) - 7.1cm (External) | | Specification Met | CE | | Thread Size | 2.8cm | | Thread Type | NPT | | UPC | 735203234951 | | Unit Count | 1.0 count | | Valve Type | Check Valve | ## 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 ### ⭐⭐⭐⭐⭐ Instant fix *by R***H on 2 October 2025* Instant fix for a leaky toilet. Unbelievably quick and easy to fit (and I'm terrible at DIY). ### ⭐⭐⭐⭐⭐ Was the exact thing I needed *by A***R on 8 June 2026* Very good exactly what I needed ### ⭐⭐⭐⭐ 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 - Replacement Toilet Flush Valve Rubber Seal Washer for Siamp Skipper 45 & Storm 33A --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima](https://www.desertcart.sg/products/451451710-replacement-toilet-flush-valve-rubber-seal-washer-for-siamp-optima) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-08*