You will find that a fair number of airliners from Boeing and Airbus do not require water checks on a daily basis.
Most airlines require that a sample of the fuel being uplifted is checked at the fuel bowser for water.
The aircraft now tend to have jet fuel pumps which can pick up the water unlike the old types. The A330 has a requirement to have a water drain because l understand this type of pump is not fitted, hear that this is a future mod.
Some a/c have a requirement for a water check on a weekly basis but it is the airline that introduce this and not the manufacture.
You can not do a water drain after you refuel because it will be of no use, you require 3 or more hours for the water to settle to its lowest point in the sump of the tank.
Hope this is of help.