Flashcards in Water Distribution - Nomenclature Deck (21)
DCW (Domestic Cold Water)
Potable water for human consumption, bathing, etc.
DHW (Domestic Hot Water)
Heated domestic cold water.
HWR (Hot Water Return)
Recirculated DHW to expedite hot water to fixture.
TW (Tempered Water)
Potable water, 60°F to 100°F for use at emergency wash fixtures.
ICW (Industrial Cold Water)
IHW (Industrial Hot Water)
Non-potable. Heated industrial cold water.
RCW (Reclaimed Water)
Non-potable. For reuse in flush fixtures and irrigation AFTER TREATMENT
IRR (Irrigation water)
Non-potable used for irrigation or landscaping purposes only.
FU (Fixture Units)
A unit assigned to plumbing fixtures to determine water demand.
Can be converted to GPM.
TP (Trap Primer)
Adds small amounts of water to p-traps so the seal is maintained on infrequently used sanitary sewer traps.
WHA (Water Hammer Arrestor)
ABSORBS water hammer (hydraulic shock) in pipes.
PRV (Pressure Regulating/Reducing Valve)
Used to reduce or regulate pressure WITHIN A WATER LINE to a desired setting.
PSV (Pressure Safety Valve)
Flow Control Valve (Circuit Setter)
Limits the FLOW of DHW to maintain minimum temperature
BFP (Back Flow Preventer)
Prevents contamination of domestic water supply.
Pressure Drop - Maintain less than or equal to _____for mains and branches
2psig drop per 100 ft of piping
Velocity - ACCO standard is... DCW velocities shall not exceed ___ fps and DHW shall not exceed ___ fps
6 and 4
A temperature sensor that controls the recirculation pump. Hot water, pump on. Cold water, pump off.
What is a mixing valve?
A valve used to reduce temperature
Where is a WHA installed?
Before the last quick closing valve in a water line