--- product_id: 176361693 title: "Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm" brand: "seawhisper" price: "£12.11" currency: GBP in_stock: true category: "Seawhisper" url: https://www.desertcart.co.uk/products/176361693-tap-valve-cartridge-inserts-1-4-turn-ceramic-disc-bath store_origin: GB region: United Kingdom --- # 38mm height compact size Includes wrench & screws 28 spline teeth precision Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm **Brand:** seawhisper **Price:** £12.11 **Availability:** ✅ In Stock ## Summary > 🚰 Upgrade your tap game—no drips, just smooth flow! ## Quick Answers - **What is this?** Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm by seawhisper - **How much does it cost?** £12.11 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/176361693-tap-valve-cartridge-inserts-1-4-turn-ceramic-disc-bath) ## Best For - seawhisper enthusiasts ## Why This Product - Trusted seawhisper brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Drip-Free Performance:** Stops annoying leaks, saving costly tap replacements - • **Easy DIY Installation:** Comes with screws and wrench for hassle-free fitting in 15 minutes - • **Universal Compatibility:** Fits double-handle kitchen & bathroom taps with BSP 1/2" thread - • **Precision 28-Spline Design:** Engineered for seamless fit and smooth quarter-turn operation - • **Durable Brass & Ceramic Build:** Half a million turns guaranteed with premium materials ## Overview The Tap Valve Cartridge Insert SP3308 is a high-quality replacement valve featuring 28 precision splines and a compact 38mm height. Crafted from superior brass and ceramic, it promises durability for over half a million turns. Designed for BSP 1/2" threaded double-handle taps, it stops leaks effectively and includes all necessary screws and a wrench for quick, easy installation—perfect for millennial pros who value efficiency and reliability. ## Description Shop Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm. Free delivery on eligible orders of £20 or more. ## Features - Dimensions - Height: 38mm. Thread width: 20.5mm. Splines: 28 teeth. Please check dimensions to make sure buy the right size. What you will get? Tap Cartridge, Screw and Wrench. - Fits double handles kitchen and bathroom basin taps, BSP 1/2" thread. 28 teeth on splines. Also drilled and threaded to fit for a M4 screw. - High quantity - Made of superior brass and ceramic (Made for a life cycle of half a million turns of the tap). They are the finest quality and hardest ceramic available. - No more drips - Did the job of stopping kitchen tap from dripping and saved a bomb in not having to replace the tap. - Fully compatible with your 3308R tap, and no need to count splines or measure multiple parts. Excellent value and very easy to fit, definitely better than forking out for a replacement tap. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B082VZZNKS | | Best Sellers Rank | 14,157 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Tap Cartridges | | Brand | Seawhisper | | Connector Type | Threaded | | Country of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (1,240) | | Exterior Finish | Brass | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | BSPT | | Manufacturer | Seawhisper | | Material | Brass | | Model Number | 3308R | | Number of Ports | 2 | | Outlet Connection Size | 0.5 Inches | | Outlet Connection Type | BSPT | | Size | 0.5 inches | | Thread Size | 0.5 inches | | Thread Type | BSP | | Unit Count | 1.0 count | | Valve Type | Ceramic Disc Valve | ## Product Details - **Brand:** Seawhisper - **Exterior finish:** Brass - **Inlet connection size:** 0.5 Inches - **Inlet connection type:** BSPT - **Material:** Brass - **Number of Packs:** 1 - **Number of ports:** 2 - **Outlet connection size:** 0.5 Inches - **Outlet connection type:** BSPT - **Unit count:** 1.0 count ## Images ![Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Image 1](https://m.media-amazon.com/images/I/615HMke0GJL.jpg) ![Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Image 2](https://m.media-amazon.com/images/I/619D20tDw5L.jpg) ![Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Image 3](https://m.media-amazon.com/images/I/7158Tecu4NL.jpg) ![Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Image 4](https://m.media-amazon.com/images/I/71Ay5OendfL.jpg) ![Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Image 5](https://m.media-amazon.com/images/I/71YAAfoHQuL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: How do I know if this cartridge fits my kitchen tap?** A: Please count the number of teeth on the spline (the top part that fits into the handle). Our cartridge is designed to be a compatible replacement for various premium kitchen taps that require this specific 28-teeth configuration. **Q: Is this compatible with high-end European brand taps like the Ascona series?** A: This valve is specifically engineered to be compatible with 28-teeth spline models often found in high-end kitchen tap series. We recommend checking your original part's dimensions and tooth count to ensure a great fit before ordering. **Q: What is the material of this replacement valve?** A: Our cartridges are made of high-quality solid brass and ceramic, ensuring durability and a leak-free experience. The 28-teeth design provides a precise and secure connection for your tap handle. **Q: Does it come with the necessary screws for installation?** A: Yes, each 28-teeth cartridge comes with a matching M4 screw to ensure you have everything needed for a quick and easy replacement process. **Q: What should I do if the handle is still loose after installation?** A: A loose handle usually means the tooth count doesn't match. Please double-check that your tap requires a 28-teeth spline. If you have the correct 28-teeth handle, our precision-machined spline will provide a tight, wobble-free fit. ## Frequently Bought Together - Tap Valve Cartridge Inserts 1/4 Turn Ceramic Disc Bath SP3308 28 Splines 38mm - Spline Plastic Tap Handle Adaptor Insert & Screw SP3530 3530R SP3537 3537R Compatible with Franke Ascona Wave Bern Ascona Maris Cartridges - Tap Cartridges For Franke Ascona 3308R 3794R x 28 Splines x 39mm Mini Valve Bottom Thread Valve Hot and Cold --- ## 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.co.uk/products/176361693-tap-valve-cartridge-inserts-1-4-turn-ceramic-disc-bath](https://www.desertcart.co.uk/products/176361693-tap-valve-cartridge-inserts-1-4-turn-ceramic-disc-bath) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-30*