Liquid Petroleum Gas is used for cooking when your house or apartment is not connected to the city gas network. These tanks contain a mix of propane and butane and the ratio might differ depending on the season. Newer houses have metal pipes that run from the outside of the house to the inside, but this place just has a hose shoved through a hole in the wall and it probably runs directly into the gas range. Or a gas boiler? The pipe in the upper left of the photo comes from a furnace. Most likely an oil furnace.
I rather like the attempt to protect the tank valves from the rain with a bit of wood and some bricks.
Just in case you’re craving more propane, here is another tank. The hose on this one takes quite a rollercoaster ride before disappearing into a hole in the wall.
I’m thinking about making a collection of LPG tank photos, but the results so far are a bit boring. But it’s early days. I might find some interesting perspectives after I practise a bit. One problem is that these tanks are all on private property and I usually can’t get very close. I’ll have to go telephoto . . . .