The Above Ground Pool, a player deployable and usable swimming pool, was introduced on July 10th 2020 as part of the RUST SUNBurn DLC update.
To get an Above Ground Pool, you must either purchase the SUNBurn DLC or buy an Above Ground Pool from another player.
The Above Ground Pool takes up approximately three by five foundations. This footprint makes it the largest player-built deployable in RUST.
Once you place the Above Ground Pool, you must fill it with 2,000 ml of water to fill it.
You can achieve this by manually carrying water canisters from a nearby water source. Once it’s been filled with water, players can use floating devices such as Boogie Boards and Inner Tubes to casually float and move around in the pool.
The Above Ground Pool is not very deep and cannot reliably jump into it from substantial heights without damage.