3. Drinking water is piped from a water main into a house via a PVC (i.e., smooth) pipe. There is a total of 20 linear feet of 1" diameter pipe between the water main and a point just inside the house that is 10 ft above the water main. This drinking water pipe branches from the water main (K₁ = 0.2), a water meter taps into the pipe (KL = 7), there are two 90° bends (K₁ = 1.5), and finally a (fully open) water shutoff ball valve (K₁ = 0.05) before the point just inside the house. The pipe maintains a flow of 0.05 ft³/s. If the goal is for the gage pressure of the water to be 8640 lb/ft² (aka 60 psi) just inside the house, what must the gage pressure of the water be at the water main? Leave your answer in lb/ft.2. water meter 90° elbow water shutoff house branch flow Il diameter z = 10 A ball valve, 90° elbow fully open z=0ft water main *drawing not to scale

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Saeed Moaveni
Chapter9: Mass And Mass-related Variables In Engineering
Section: Chapter Questions
Problem 37P
Question
3. Drinking water is piped from a water main into a house via a PVC (i.e., smooth) pipe.
There is a total of 20 linear feet of 1" diameter pipe between the water main and a point
just inside the house that is 10 ft above the water main. This drinking water pipe
branches from the water main (K₁ = 0.2), a water meter taps into the pipe (KL = 7), there
are two 90° bends (K₁ = 1.5), and finally a (fully open) water shutoff ball valve (K₁ = 0.05)
before the point just inside the house. The pipe maintains a flow of 0.05 ft³/s. If the goal
is for the gage pressure of the water to be 8640 lb/ft² (aka 60 psi) just inside the house,
what must the gage pressure of the water be at the water main? Leave your answer in
lb/ft.2.
water meter
90° elbow
water shutoff
house
branch flow
Il diameter
z = 10 A
ball valve,
90° elbow
fully open
z=0ft
water
main
*drawing not to scale
Transcribed Image Text:3. Drinking water is piped from a water main into a house via a PVC (i.e., smooth) pipe. There is a total of 20 linear feet of 1" diameter pipe between the water main and a point just inside the house that is 10 ft above the water main. This drinking water pipe branches from the water main (K₁ = 0.2), a water meter taps into the pipe (KL = 7), there are two 90° bends (K₁ = 1.5), and finally a (fully open) water shutoff ball valve (K₁ = 0.05) before the point just inside the house. The pipe maintains a flow of 0.05 ft³/s. If the goal is for the gage pressure of the water to be 8640 lb/ft² (aka 60 psi) just inside the house, what must the gage pressure of the water be at the water main? Leave your answer in lb/ft.2. water meter 90° elbow water shutoff house branch flow Il diameter z = 10 A ball valve, 90° elbow fully open z=0ft water main *drawing not to scale
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