--- product_id: 403741234 title: "JG Speedfit CM451214FS 12mm x 1/2\" BSP Female Water Adaptors (2 Pack)" brand: "john guest" price: "80.38 DT" currency: TND in_stock: true reviews_count: 13 category: "John Guest" url: https://www.desertcart.tn/products/403741234-jg-speedfit-cm451214fs-12mm-x-1-2-bsp-female-water store_origin: TN region: Tunisia --- # Leak-tight seal without tools 12mm push-fit pipe compatibility Durable acetal construction JG Speedfit CM451214FS 12mm x 1/2" BSP Female Water Adaptors (2 Pack) **Brand:** john guest **Price:** 80.38 DT **Availability:** ✅ In Stock ## Summary > 🚀 Upgrade your water connections—fast, flawless, and future-proof! ## Quick Answers - **What is this?** JG Speedfit CM451214FS 12mm x 1/2" BSP Female Water Adaptors (2 Pack) by john guest - **How much does it cost?** 80.38 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/403741234-jg-speedfit-cm451214fs-12mm-x-1-2-bsp-female-water) ## Best For - john guest enthusiasts ## Why This Product - Trusted john guest brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Robust grey acetal material withstands hot and cold potable water environments. - • **Leakproof Confidence:** Instant secure seal ensures zero leaks, protecting your plumbing system. - • **Versatile Application:** Perfect for caravans, motorhomes, boats, and domestic water systems. - • **Trusted Quality Assurance:** Pressure and temperature tested by John Guest for industry-leading reliability. - • **Effortless Push-Fit Installation:** Connect 12mm pipes to 1/2" BSP taps in seconds—no tools or glue needed. ## Overview The JG Speedfit CM451214FS 12mm x 1/2" BSP Female Water Adaptors (2 Pack) offer a premium push-fit solution for connecting 12mm pipes to 1/2" BSP threaded taps. Crafted from durable acetal, these adaptors provide a secure, leak-tight seal instantly without the need for tools, soldering, or glue. Ideal for a range of applications including caravans, motorhomes, boats, and domestic plumbing, they combine ease of installation with long-term reliability, backed by rigorous pressure and temperature testing from John Guest. ## Description Product Description Why Choose JG Speedfit? JG Speedfit push-fit plumbing and heating • Install, demount and refit in seconds without tools • Safer and cleaner with no hot works, flux or glue • Less labour-intensive, especially in tight spaces • Non-toxic, resists corrosion and scale build-up • High performance leakproof connections / compatible with plastic or copper pipe How to make a connection - Standard Fittings Standard Fittings Push pipe up to Pipe Stop. If the Speedfit pipe has been cut correctly the insertion mark on the pipe will be level with the collet head Pull to check connection is secure and test the system Twist & Lock Fittings Twist the screwcap until it touches the body flange. This increases the O-Ring seal around the pipe and locks the pipe into position If you are not using collet clips, ensure that the screwcaps are in the locked position. Pull to check it is secure Premium Piece On every product John Guest Speedfit make, you’ll find the JG monogram proudly stamped, as a mark of trusted authenticity and quality. All their products are pressure and temperature tested to ensure they meet and exceed exacting industry standards. Review: Motorhome - Great stuff done the job Review: Reliable design - Good secure fit, easy to install and no leaks ## Features - Pack of 2 female water adaptors connect 12mm push fit pipe to 1/2" BSP male threaded taps, pumps and water system components - Instant push fit connection creates a secure leak tight seal without tools, soldering, glue or sealing compounds - Durable grey acetal construction provides reliable long term performance in hot and cold potable water applications - Ideal for caravans, motorhomes, boats, water filtration and domestic plumbing systems using compatible 12mm pipe ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09Q969VJV | | Best Sellers Rank | 3,110 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 6 in Pipe Fitting Adapters | | Brand | John Guest | | Colour | White | | Connector Type | Adapter | | Connector type | Adapter | | Customer Reviews | 4.6 out of 5 stars 275 Reviews | | Item Dimensions | 40 x 25 x 25 millimetres | | Item Weight | 20 Grams | | Item dimensions L x W x H | 40 x 25 x 25 millimetres | | Manufacturer | John Guest | | Material | Brass | | Model Number | CM451214FS | | Number of Packs | 2 | | Number of Pieces | 2 | | Part Number | FITSET | | Set Name | John Guest 2-Piece 1/2" BSP to 12mm Female Water Adapter Set | | Size | 12mm | | Thread Size | 1/2" | | Thread Type | BSP | | Unit Count | 1.0 count | ## Product Details - **Size:** 12mm - **Material:** Brass - **Brand:** John Guest - **Colour:** White - **Item dimensions L x W x H:** 40 x 25 x 25 millimetres - **Connector type:** Adapter - **Thread size:** 1/2" - **Thread type:** BSP - **Item weight:** 20 Grams - **Number of pieces:** 2 ## Images ![JG Speedfit CM451214FS 12mm x 1/2" BSP Female Water Adaptors (2 Pack) - Image 1](https://m.media-amazon.com/images/I/61ZbX4X5M3L.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Motorhome *by M***. on 26 December 2025* Great stuff done the job ### ⭐⭐⭐⭐⭐ Reliable design *by P***L on 29 August 2026* Good secure fit, easy to install and no leaks ### ⭐⭐⭐⭐⭐ Secure and totally watertight. *by F***O on 19 April 2026* First time I've used these type of push fits. Sceptical at first. But these john guest fittings are absolutely brilliant. Zero leaks. Just use quality pipe as well. ## Frequently Bought Together - John Guest Female 1/2" BSP to 12mm Push Fit Water Adaptor **(2 Pack)** - John Guest PP Shut Off Valve Connection 12 mm (One Supplied) - John Guest Male 1/2" BSP to 12mm Push Fit Water Adaptor **(2 Pack)** --- ## 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.tn/products/403741234-jg-speedfit-cm451214fs-12mm-x-1-2-bsp-female-water](https://www.desertcart.tn/products/403741234-jg-speedfit-cm451214fs-12mm-x-1-2-bsp-female-water) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-25*