Any idea how to increase water pressure in a pre war building? Will mgmt need to update the plumbing in the basement only or will it also require to update each unit?

Thanks

I think it depends on where you are in the building. I believe a lot of higher floors in coops get their pressure from the holding tank on the roof while the lower floors get it from the street.

Right, street pressure is usually sufficient up through five or six floors. Anything higher needs a roof tank.

An engineer would have to look at the system and determine the cause of the low pressure. E.g., the capacity of the pipes might be undersized due to scaling or bad design.