WATER DISTRIBUTION - ECCC
GE EXAM
Water System Design Process - ANSWERS-1. Determine Peak
Demand (Q/GPM)
2. Size the water distribution pipes
3. Calculate Total Daily Demand for the system
4. Determine storage requirements
Peak Demand (Q) - ANSWERS-Max flow of water each facility in
your plan will need. Determines what size pipe is needed
Types of Distribution Systems - ANSWERS-Loop: Less risk. More
waste
Dead End System (TO): Less waste. More risk
Values of Water Pressure - ANSWERS-1 cubic foot of water = 62.4
lbs/cu ft.
1 square inch, 12" high column of water = .433 lbs
Pressure =.433 psi x Height`
, How to Determine Peak Demand (Q) - ANSWERS-(fixture unit
value) x (# of fixtures) = total F.U.V
compare F.U.V on Peak Demand Table
* use interpolation formula
Calc. for Static Head Pressure - ANSWERS-P = .4333 (change in
height)
Elevation = highest elevation - 2.31 (P)
Calc. for Dynamic Head Pressure - ANSWERS-(static head) - friction
losses
General Numbers for Water Demand and Storage - ANSWERS-TO =
5-25 gallons per day
Storage requirement = TDD/2
Total Daily Demand (TDD) - ANSWERS-TDD = Domestic Demand
(DD) + Facilities Demand (FD)
Amount of water required on a daily basis for a unit to perform its
mission
GE EXAM
Water System Design Process - ANSWERS-1. Determine Peak
Demand (Q/GPM)
2. Size the water distribution pipes
3. Calculate Total Daily Demand for the system
4. Determine storage requirements
Peak Demand (Q) - ANSWERS-Max flow of water each facility in
your plan will need. Determines what size pipe is needed
Types of Distribution Systems - ANSWERS-Loop: Less risk. More
waste
Dead End System (TO): Less waste. More risk
Values of Water Pressure - ANSWERS-1 cubic foot of water = 62.4
lbs/cu ft.
1 square inch, 12" high column of water = .433 lbs
Pressure =.433 psi x Height`
, How to Determine Peak Demand (Q) - ANSWERS-(fixture unit
value) x (# of fixtures) = total F.U.V
compare F.U.V on Peak Demand Table
* use interpolation formula
Calc. for Static Head Pressure - ANSWERS-P = .4333 (change in
height)
Elevation = highest elevation - 2.31 (P)
Calc. for Dynamic Head Pressure - ANSWERS-(static head) - friction
losses
General Numbers for Water Demand and Storage - ANSWERS-TO =
5-25 gallons per day
Storage requirement = TDD/2
Total Daily Demand (TDD) - ANSWERS-TDD = Domestic Demand
(DD) + Facilities Demand (FD)
Amount of water required on a daily basis for a unit to perform its
mission
