--- product_id: 64457686 title: "John Guest 15mm x 3/8\" Straight Connector" brand: "john guest" price: "$22.96" currency: USD in_stock: true reviews_count: 4 category: "John Guest" url: https://www.desertcart.us/products/64457686-john-guest-15mm-x-3-8-straight-connector store_origin: US region: United States of America --- # BSI & WRAS certified reliability 15mm to 3/8" precision fit Lead-free plastic with Grip & Seal tech John Guest 15mm x 3/8" Straight Connector **Brand:** john guest **Price:** $22.96 **Availability:** ✅ In Stock ## Summary > 🔗 Connect with confidence—where precision meets peace of mind! ## Quick Answers - **What is this?** John Guest 15mm x 3/8" Straight Connector by john guest - **How much does it cost?** $22.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/64457686-john-guest-15mm-x-3-8-straight-connector) ## 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 - • **Push-Fit Precision:** Innovative Grip and Seal technology clicks into place for secure, leak-free connections. - • **Safe & Sustainable:** Lead-free plastic ensures clean water delivery with eco-conscious peace of mind. - • **Versatile Application:** Perfect for hot/cold water and central heating systems—engineered for your modern home. - • **Seamless Pipe Transition:** Effortlessly connects 15mm copper to 3/8" plastic pipes for flawless flow. - • **Trusted Quality Assurance:** BSI and WRAS certifications guarantee industry-leading safety and performance. ## Overview The John Guest 15mm x 3/8" Straight Connector is a compact, lead-free plastic adapter designed for seamless connection between copper and plastic pipes. Featuring advanced Grip and Seal technology, it ensures a secure, leak-proof fit. Certified by BSI and WRAS, this connector is ideal for hot and cold water as well as central heating systems, delivering reliable performance trusted by professionals. ## Description Shop John Guest 15mm x 3/8" Straight Connector. Free delivery on eligible orders of £20 or more. Review: Quality fitting, did the job perfectly. - Used to connect a 15mm copper pipe to a 3/8" plastic tube for drinking water from our borehole, worked perfectly. Review: Used for reducing pipework on a beer cooler - Good solid push fit fitting. You can tell when it is fully in place as you feel a sort of click as it beds home. We needed to drop from 15mm to 3/8" then use another reducer to get down from 3/8" to the 5/16" cooling line we use (unfortunately there doesn't appear to be a direct 15mm to 5/16" reducer) ## Features - DIMENSIONS: 15 mm to 3/8 inch connection ports - MATERIAL: Lead-free plastic construction with Grip and Seal technology - COMPATIBILITY: Suitable for plastic and copper pipe connections - CERTIFICATIONS: BSI and WRAS approved - APPLICATIONS: For hot and cold water and central heating systems ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00HVFULY2 | | Best Sellers Rank | 32,385 in DIY & Tools ( See Top 100 in DIY & Tools ) 213 in Pipes, Pipe Fittings & Accessories | | Brand | John Guest | | Colour | Grey, White | | Connector Type | Adapter | | Customer Reviews | 4.7 4.7 out of 5 stars (42) | | Item Dimensions | 5.5 x 2.5 x 2.5 centimetres | | Item Weight | 10 Grams | | Manufacturer | John Guest | | Material | Copper, Plastic | | Number of Pieces | 1 | | Size | 15mm x 3/8" | | Thread Size | 0.375 inches | | Thread Type | UN | | Unit Count | 1.0 count | ## Product Details - **Brand:** John Guest - **Colour:** Grey, White - **Connector type:** Adapter - **Item dimensions L x W x H:** 5.5 x 2.5 x 2.5 centimetres - **Item weight:** 10 Grams - **Material:** Copper, Plastic - **Number of pieces:** 1 - **Size:** 15mm x 3/8" - **Thread size:** 0.375 inches - **Thread type:** UN ## Images ![John Guest 15mm x 3/8" Straight Connector - Image 1](https://m.media-amazon.com/images/I/51CdLE0LYJL.jpg) ![John Guest 15mm x 3/8" Straight Connector - Image 2](https://m.media-amazon.com/images/I/5183Yem7EoL.jpg) ![John Guest 15mm x 3/8" Straight Connector - Image 3](https://m.media-amazon.com/images/I/61KwpDN2K3L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality fitting, did the job perfectly. *by A***W on 11 January 2025* Used to connect a 15mm copper pipe to a 3/8" plastic tube for drinking water from our borehole, worked perfectly. ### ⭐⭐⭐⭐⭐ Used for reducing pipework on a beer cooler *by K***N on 3 May 2024* Good solid push fit fitting. You can tell when it is fully in place as you feel a sort of click as it beds home. We needed to drop from 15mm to 3/8" then use another reducer to get down from 3/8" to the 5/16" cooling line we use (unfortunately there doesn't appear to be a direct 15mm to 5/16" reducer) ### ⭐⭐⭐⭐⭐ It’s a J G fitting *by M***Y on 26 May 2020* It’s a John Guest fitting, as usual no leaks. You cannot buy better. ## Frequently Bought Together - John Guest 15mm x 3/8" Straight Connector - 5m Blue Water Tube 3/8" (9.5mm OD) for Reverse Osmosis Systems, Refrigerators, Espresso Coffee Machines, Vending Machines, Water Filters. - John Guest PPSV041212WP Plastic Push Shut Off Valve, White, 3/8 in. Tube OD --- ## 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.us/products/64457686-john-guest-15mm-x-3-8-straight-connector](https://www.desertcart.us/products/64457686-john-guest-15mm-x-3-8-straight-connector) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-25*