In a large bowl, rinse the barley for a few times.
Soak the barley in water, for a minimum of 3 hours.
Rinse the barley, one last time.
Over medium heat, add the barley in a large boiling pot.
Add 2 litres of water.
Add the salt.
Tie individual pandan leaves into knots and add to the pot.
Cover the pot with the lid and bring the water to a rolling boil.
Once it achieves a rolling boil, reduce the the heat to low and allow the barley water to boil for 45 minutes to 1 hour.
When the barley has softened and the water becomes cloudy, turn off the heat and allow the water to cool.
Remove and discard the pandan leaves.
Dish out the barley water without the seeds into serving glasses.
Serve.