Water Distribution - Nomenclature Flashcards Preview

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Flashcards in Water Distribution - Nomenclature Deck (21)
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1

DCW (Domestic Cold Water)

Potable water for human consumption, bathing, etc.

2

DHW (Domestic Hot Water)

Heated domestic cold water.

3

HWR (Hot Water Return)

Recirculated DHW to expedite hot water to fixture.

4

TW (Tempered Water)

Potable water, 60°F to 100°F for use at emergency wash fixtures.

5

ICW (Industrial Cold Water)

Non-potable water

6

IHW (Industrial Hot Water)

Non-potable. Heated industrial cold water.

7

RCW (Reclaimed Water)

Non-potable. For reuse in flush fixtures and irrigation AFTER TREATMENT

8

IRR (Irrigation water)

Non-potable used for irrigation or landscaping purposes only.

9

FU (Fixture Units)

A unit assigned to plumbing fixtures to determine water demand.
Can be converted to GPM.

10

TP (Trap Primer)

Adds small amounts of water to p-traps so the seal is maintained on infrequently used sanitary sewer traps.

11

WHA (Water Hammer Arrestor)

ABSORBS water hammer (hydraulic shock) in pipes.

12

PRV (Pressure Regulating/Reducing Valve)

Used to reduce or regulate pressure WITHIN A WATER LINE to a desired setting.

13

PSV (Pressure Safety Valve)

Prevents over-pressurization.

14

Flow Control Valve (Circuit Setter)

Limits the FLOW of DHW to maintain minimum temperature

15

BFP (Back Flow Preventer)

Prevents contamination of domestic water supply.

16

Pressure Drop - Maintain less than or equal to _____for mains and branches

2psig drop per 100 ft of piping

17

Velocity - ACCO standard is... DCW velocities shall not exceed ___ fps and DHW shall not exceed ___ fps

6 and 4

18

Aquastat

A temperature sensor that controls the recirculation pump. Hot water, pump on. Cold water, pump off.

19

What is a mixing valve?

A valve used to reduce temperature

20

Where is a WHA installed?

Before the last quick closing valve in a water line

21

Where is the aquastat located?

on the hot water return loop