There is a hot and cold water fountain in Terminal 3 after security between the entrance to the male and female toilets
I have attached the photos of the water fountain in T3 at Las Vegas McCarran airport.
Thanks for a great website. It’s very useful.
Alan F
Water refill station after security checkpoint for A/B gates in Terminal 1. Take a left past security check lines and look for restrooms.
#plasticfree @LASairport