Less smell and less harmfull gases in pighouses.

Pigs eat and grow better.

Less tail-biting and ear sucking.

Less smell when spreading slurry.

More comfortable working conditions inside of pighouses.

Smell of manure doesn't stick to hands and clothes so much.

Pigs are healthier.

Waterlines and -valves are cleaner .

And like You can see on next chart of official test that pigs grows much better when they gets water from pipe.
Read whole test "Test results".