There is one located on the picnic table at the very start of the yao guai tunnels.
There are two located at the Our Lady of Hope Hospital on the second level in the room right of the lunch room. They are on the right side of the counter, or in the cafeteria.
Inside a house in Nipton. The relevant house is located directly southeast of the Town Hall, and has a mailbox with a cattle skull supplanted on it. Located in the kitchen.
There are eight of them in the Ultra-Luxe kitchen. Three are an undersized version, on the bottom shelf of each of the three metal shelves.
In Wolfhorn Ranch. In a small wooden box, on the floor next to the bed.
Right next to Hidden Supply Cave on the Eastern side. A small campfire sheltered by an overhang, found amongst other loot therein.
On the oven in Jeannie May Crawford's house in Novac, although you will lose karma for stealing this item. Unless she has been killed by Boone; in this instance the item will show up "red" but result in no loss of Karma.
On a cooker at the rear of the canteen area, NCR Embassy, the Strip.
In the Silver Peak Mine Shack, in a sunset sasparilla crate in between the two small tables.
Pressure cookers can also be found in many abandoned shacks, ransacked caravans, kitchens, or sometimes amongst piles of junk.
Two or three are located inside of Miguel's Pawn Shop - On display and for sale.
One may be located on the back shelf in the kitchen of the Hostetler Home. Despite being located inside an owned residence, there is no karma loss for taking this, or any other item in the house.
