On Feb 3, 8:17*am, Doug Miller
wrote:
micky wrote in news:43hni71mn90h6hobj0vhe0e3koac8b8dag@
4ax.com:

In NYC, city water pressure is enough for 4 flights or 5 and if you
have 6, you have to put a combination pump in the basement.

???

"4 or 5 flights" is maybe sixty feet, definitely less than 30 psi of head loss.

Indianapolis city water pressure is around 120 psi -- which would still leave 90 psi available on the sixth
floor. Is NYC pressure that much lower? Or is the pump a city code requirement?

More the age factor of some of the water system...

It was installed many many years before Indianapolis was digging
wells and still using buckets and hand operated pumps to draw
water out of the ground...

Older cities typically have a lower pressure water system as an
artifact of the nature of having a system cobbled together by
pipes of various ages including some originally laid connections
going all the way back to antiquity...

NYC street level water pressure (not the high pressure, high volume
water mains) being 120 psi would be entertaining, as it is highly
likely
that there would be geysers erupting at every street corner...

~~ Evan