Don't forget the fittings for the bulk tank drain & hose connection to the big truck that hauled the milk away. Once the tank was empty the whole works had to be cleaned with scalding hot water & special dairy equipment "soap" before starting the cycle over again. 365 days a year, no time off & no vacations.
It is really depressing to drive through Wisconsin, and other former dairy areas & judge how long the dairies have been closed by how run down the buildings have become and whether there are still lot fences, etc.
I could still milk a cow by hand if any of today's cows would stand still for the experience.