It used to be that the company that installed the tank then supplied you with LPG but I think that changed a few years ago. Ours was installed by MSF (now Countrywide) and fitted with an aerial link that finds the nearest mobile signal - our daily use is recalculated every day so the tanker comes out whenever it goes down to 40% capacity. Keep an eye on prices all the time. If your regular supplier's price is above that of rival companies it's worth having a word with the sales department and asking why. In our experience they generally reduce your price to match. Our tank is close to the lane - a distinct advantage in winter as it's your responsibility to clear the drive/track from the lane to the tank so you can get deliveries in ice or snow.