HGP LPG Manual Changeover Regulator Kit with OPSO - UK POL A proper manual changeover LPG regulator kit that gives you a rock-solid, continuous propane supply from two cylinders. And the brains of it all is a Clesse regulator that's been certified to EN16129, with a built in OPSO (Over Pressure Shut-Off) to keep everything running safely. This is the kind of thing you need for homes, catering vans, park homes, caravans, holiday lets and inland waterways where things need to run smoothly and safely. Switch between cylinders yourself when one runs out - no need to worry about appliances shutting down or anything like that. What This Kit Actually Does This system takes two UK POL propane cylinders and turns them into a single 37mbar LPG supply. When th