Clesse Compact TR800 Auto Changeover Valve with OPSO & Galvanised Pigtails (Irish) The Clesse Compact TR800 Automatic Changeover Propane Gas Regulator Kit (F-Valve) gives you safe, reliable and uninterrupted propane supply by automatically switching between cylinders when one runs out. With its compact design and high-performance safety features it’s perfect for residential, commercial and off-grid LPG systems. This kit includes a TR800 automatic changeover regulator, two 20-inch high-pressure Irish F-Valve pigtails with excess flow and non-return valves, a mounting bracket, and a full-bore EN331 MOP5 butterfly ball valve with test point for easy and secure ins