Clesse CSR485 OPSO LPG Manual Changeover Regulator Kit – Irish F-Valve The Clesse CSR485 OPSO LPG Manual Changeover Regulator Kit gives you a safe, reliable and continuous propane supply for homes, commercial kitchens and outdoor gas systems. With Irish F-Valveconnections this all in one kit fits all Calor and Flogas cylinders and is perfect for installations where safety, durability and uninterrupted performance are key. Featuring Over Pressure Shut Off (OPSO) safety technology and manual changeover you can switch between two cylinders – so your gas supply never stops. Built from high quality materials and tested to EN 16129 the CSR485 will perform for years even in the harshest of UK weather. Key Features & Benef