Deck 24: Plumbing Codes: Nonpotable Water Systems

Question 1

Which of the following is NOT a source of gray water?

A)swimming pool backflush operations
B)air conditioning condensate
C)foundation drain water
D)kitchen sinks

Answer 1

D

Question 2

As a rule, most codes require the overflow pipe from a nonpotable water tank to be of what size compared to the inlet piping?

A)half
B)equal to
C)double
D)three times as large

Answer 2

B

Question 3

When vents are used for storage thanks, the 2015 Uniform Plumbing code requires that the pipes serving as vents terminate a minimum of what distance above grade?

A)1 foot
B)3 inches
C)10 inches
D)6 inches

Answer 3

D

Question 4

Most codes demand that nonpotable water systems must have a minimum horizontal clearance of what distance from potable water wells?

A)10 feet
B)20 feet
C)100 feet
D)50 feet

Question 5

As a means to conserve our natural resources, many individuals and companies have turned to collecting black water for uses that do not require potable water.

Question 6

Who is required to keep an up-to-date maintenance log indicating the frequency of inspection and maintenance of nonpotable water systems?

A)local water board representative
B)code inspector
C)property owner
D)system installer

Question 7

Under what circumstances can nonpotable water be available for human consumption?

A)when there is a localized water shortage
B)when the user is interested in water conservation
C)when mixed with potable water
D)none of the above

Question 8

Most codes limit system pressure in nonpotable water systems employing pumps to what level of psi?

A)100 psi
B)60 psi
C)120 psi
D)80 psi

Question 9

At what point does the 2015 International Plumbing Code dictate that a nonpotable water system be designed by a registered design professional or person authorized by local jurisdiction?

A)discharge of more than 250 gallons per day
B)discharge of more than 360 gallons per day
C)discharge of more than 100 gallons per day
D)discharge of more than 150 gallons per day

Question 10

Most codes require nonpotable water piping to be what color as to visually distinguish it from potable water lines?

A)red
B)purple
C)black
D)orange

Question 11

How are gray water and reclaimed water different?

A)gray water is treated water
B)reclaimed water is safe for human consumption
C)reclaimed water is treated water
D)gray water is safe for animal consumption

Question 12

When the necessary system pressure cannot be achieved by elevating a tank, a pump is usually added.

Question 13

If a cross connection is found between a nonpotable and potable water system, what must be done before the potable water system can be put into permanent service?

A)it must be disinfected
B)it must be rebuilt, with new piping in affected areas
C)it must be flushed thoroughly
D)the nonpotable water system must be uninstalled

Question 14

Which of the following would NOT produce what the UPC defines as gray water?

A)laundry tubs
B)toilet
C)showers
D)clothes washers

Question 15

When a nonpotable water supply and a potable water system are located within the same property, the authority having jurisdiction may require a cross-connection test to prove that the building fixtures and systems are not crossed.