$30$ pts

Water Supply System

Upfeed system

When the pressure from the city mains is sufficient to overcome all friction in the system with the calculated flow and still maintain the minimum pressure needed at the highest outlet, the system used is called an upfeed system.

Will $40$ psi minimum maintained city mains pressure be sufficient for the structure shown?

Assumptions

$5$ psi friction loss on the water meter

$9\frac{}{100}ft$ pressure loss in piping

Fittings add $50\%$ to effective pipe length

Distance from water main to the farthest fixtures:

Second$-$floor shower head $=90ft$

Garden hose bibb $=60ft$

$9$ ft floor height

$5$ ft from mains to first$-$floor

From Table $9\mathrm{.}1$:

Required minimum flow pressures are:

$8$ psi$-$showerhead

$15$ psi $-5/8-$in sillcock

Highest fixture is the shower head:

Shower head $-7$ ft above the second floor

Total height $=5ft+9ft+7ft=21ft$

Garden hose bibb is $8$ ft above the water main

Schematic plumbing section of an upfeed water distribution system using city mains pressure. The building is a two$-$story residence.

$[$ THATS THE PICTURE$]$

$$ Shower $(13$pts$)$

Fixture pressure $=$ Mains pressure $-$ Static head $-$ Total friction

$$ House Bibb $(13$ pts$)$

Fixture pressure $=$ Mains pressure $-$ Static head $-$ Total friction

$$ Would the mains pressure be adequated if the hose bibb was a $3/4-$in$,$ requiring $30$ psi? $(6$ pts$)$