The John Guest Speedfit 15mm to 12mm Reducer is the perfect solution for quickly and effortlessly reducing the diameter of your plumbing connections. This high-quality black acetal push-fit reducer fitting is designed for seamless integration with John Guest push-fit systems, allowing you to create an instant, leak-tight seal without the hassle of tools, hot works, or sealing agents. The innovative collet locking mechanism securely grips the pipe, ensuring a firm hold without causing any deformation or restricting flow. Made from corrosion-resistant materials, these fittings are fully demountable, which enhances system performance and minimizes downtime during maintenance. Upgrade your plumbing setup with the reliable and efficient John Guest reducer fitting today! This fitting also works well in caravan, campervan, boat, and motorhome applications.