HGP 4-Pack Automatic Changeover Gas Regulator – Reliable and Efficient Multi-Cylinder LPG Management The HGP 4-Pack Automatic Changeover Gas Regulator with OPSO (UK POL) is a high-performance solution designed to manage LPG supply from multi-cylinder systems efficiently. This advanced regulator automatically switches between cylinders when one becomes empty, ensuring a continuous and uninterrupted gas flow for residential, commercial, and off-grid applications. Equipped with OPSO (Over Pressure Shut-Off) technology, this regulator enhances safety by preventing overpressure in the system, protecting appliances and ensuring reliable operation. The UK POL connections provide secure compatibility with propane cylinders, while its robust design guarantees durability and long-lasting performance.