Physical Water Surface is fully compatible with Unreal Engine 4.14.
If you’re using 4.14 or higher and the water surface looks a bit blurry, please select FXAA under Project Settings -> Rendering -> Anti-Aliasing Method. In 4.14, the Anti-Aliasing Method setting is no longer part of the PostProcessVolume settings, so it’s possible that the setting automatically reverts to TemporalAA when you update to 4.14. You can find more information on good Anti-Antialiasing settings in the wiki: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums