The John Guest Speedfit Double Check Service Valve JG 15mm 15DCSV is a high-quality plumbing accessory designed for use in various systems. Made from durable acetal material, this double discharge valve features a compact unit height of 38.3mm and a length of 122mm, making it easy to install. With a weight of just 0.0785kg, this product is reliable and efficient, perfect for ensuring the smooth operation of plumbing systems in your home or commercial setting.