Potable/Non-Potable
Term used for water that is safe for human consumption
What is Potable Water?
Low hazard to potable water
What is Pollution (not a health risk)?
Minimum building entrance pressure per IPC
What is 15 PSI?
Fixture units are used to size these.
What are Water Distribution Systems?
Low water pressure only at one fixture
What is the result of a Clogged aerator / local blockage?
Examples of a potable water source
What are Municipal supply or Approved well?
High hazard to potable water
What is Contamination (a health risk)?
Pressure measured when fixtures are closed
What is Static pressure?
Layout of central main with branches.
What is a Trunk-and-Branch Layout?
Low water pressure at all fixtures when multiple run
What is the result of undersized piping?
Examples of a non-potable water source
What are Irrigation Canals or Untreated Rainwater?
The most reliable backflow prevention method
What is an Air Gap?
Primary cause of pressure loss in piping
What is Friction?
An advantage of a Home-Run Layout.
What Layout results in even pressure & isolation of fixtures
Possible causes of high pressure inside building
What are Missing or Faulty PRV?
IPC section that governs potable water
What is IPC 602?
Device required for high hazard back pressure
What is a Reduced Pressure Principle Backflow Prevention Assembly?
Pressure Gauge
What tool measures water pressure?
Appendix E
What is the IPC appendix for water pipe sizing methods?
This can result in reduced Flow Rate & Pressure
What is Scaling in pipes?
Separation of potable and non-potable systems
How is contamination of drinking water prevented?
IPC section for backflow prevention
What is IPC 608?
The loss in pressure if static is 60psi & highest fixture is 20psi
What is 40 psi?
The calculated FU for 1 kitchen sink, 1 lavatory, and 1 shower
What is 4.5 WSFU?
Can be used to prevent back-siphonage from hose bibb
What is a vacuum breaker or air gap?