Place a garden hose in the pool. Allow it to coil on the bottom of the pool so it does not come out of the pool after you turn on the water.
Connect the female end of the garden hose to an outside faucet. Turn on the water.
Check the pool every few hours to ensure it is filling properly. Look for leaks outside the pool and tears in the vinyl liner.
Turn off the water when the level inside the pool reaches the designated fill line. This line is approximately at 90 percent fill capacity of the pool.