PLUMBING CODE 3

Backflow prevention for hot water over ___ shall be a listed type assembly designed to operate at temperature of ___ or higher without rendering any portion of the assembly inoperative.

a. 100°F

b. 110°F

c. 120°F

d. 140°F

b. 110°F

Non-absorbent materials shall be provided ___ in front of urinal.

a. 1.2 m

b. 0.3 m

c. 0.9 m

d. 0.6 m

d. 0.6 m

WSFU of wash sink, circular or multiple (each set of faucets)

a. 4

b. 3

c. 2

d. 1

c. 2

Minimum diameter of a building sewer

a. 150 mm

b. 200 mm

c. 250 mm

d. 300 mm

a. 150 mm

does not connect directly with the drainage system

Indirect waste pipe

minimum airgap for drainage from the rim of the floor sink

25 mm

Water lifts, expansion tanks, cooling jackets, sprinkler systems, drip or overflow pans shall discharge to _____.

Air gap

Swimming pools shall discharge to ____

Indirect waste

Indirect waste pipes exceeding ___m and less than ___m shall be directly trapped, but not needed to be vented

1.5m and 4.6m

Indirect waste pipes less than ____ in length need not be larger in diameter than the drain outlet or tailpiece of the fixture, appliance or equipment served

4.6m

minimum dimension of indirect waste pipe

13mm

height of standpipe receptor above the trap of clotheswashers

0.45 m to 0.8 m

Height of trap for clotheswashers. No rap shall be below the floor

0.15 m to 0.45 m

shall drain through airgap

Sterile equipment

May be installed with indirect wastes

Drinking Fountains

Necessary for the connection of dishwashing machine to a food waste disposer

Dishwasher airgap fitting

minimum inlet for waste line carrying refrigeration waste

32 mm

maximum temperature to discharge under pressure directly into drainage system

60°C

Pipes from boilers shall discharge through____

Indirect waste pipe

Deep seal trap shall extend within ___ of the bottom of the tank

152 mm

opening on the highest point of the deep seal trap to serve as a siphon breaker

19 mm

thickness of chemical-resistant glass-lined pipe, silicon iron pipe, lead pipe as vents serving acid or corrosive chemical

3.2 mm

The owner shall make and keep a permanent record of the location of all pipings and venting carrying _____

Chemical Materials

Minimum size of indirect waste line carrying refrigeration waste

a. 32 mm

b. 38 mm

c. 51 mm

d. 76 mm

a. 32 mm

Condensers of metal shall not be less than ___ thick.

a. G.A. No. 17

b. G.A. No. 12

c. G.A. No. 16

d. G.A. No. 24

b. G.A. No. 12

a fitting that provides a liquid seal which prevents the backflow of foul air

Trap

Note: Memorize picture

that portion of a fixture drain between a trap and the vent

Trap arm

Note: memorize picture

the maximum vertical depth of liquid that a trap will retain

Trap seal

Note: memorize picture

the vertical distance between the dip and the crown weir of a trap

seal

Note: memorize picture

connects the outlet of a plumbing fixture to the trap

Tailpiece

Note: Memorize the picture

maximum length of tailpiece

0.6 m

measured from the trap weir to the inner edge of the vent

Developed length

minimum developed length of trap arm

2x the diameter of trap arm

A change in direction of trap arm which does not exceed ___ does not require a cleanout

90°

For trap arms 76 mm in diameter and larger with a change of direction greater than ___, a cleanout is required at bend

22-1/2°

maximum developed length between trap of a water closet from top of closet ring to inner edge of vent

1.8 m

Memorize

thickness for exposed and readily accessible drawn brass tubing trap, excluding urine

Gauge 17 B&S or 1.1 mm

maximum number of slip joint on the outlet side of a trap

1

depth of water seal

51 mm to 102 mm (2” to 4”)

2 classifications of traps

1. Common Seal P-Trap

2. Deep Seal P-Trap

trap intended for fixtures set on the floor like bathtub, foot and sitz bath. Shall be installed with vent

Drum trap

Prohibited traps

• “S” trap

• Bell and crown vented traps

• Double-trapping

• Drum traps are allowed only when permitted

FAMILIARIZE

protection for drains or traps subject to infrequent use

Trap primer

term used when water seal escapes from the p-trap

Trap seal loss

result of minus pressure in the drainage system

Siphonage

Indirect o momentum siphoning

Caused by plus pressure. When large amount of water flow drops downward rapidly forming a slug like, the air inside the pipe will be compressed downward

Backpressure

minor problem and less probable to drain water inside the trap. This happens on floor drains not regularly used to admit water.

Evaporation

wind velocity passing over the top of the soil pipe may affect the trap seal

wind effect

The kind of trap seal loss that seldom happens and is rarely experienced by homeowners. Draining of water seal caused by foreign objects like thread or string suspended and extended over the outlet arm of the trap

Capillary Action

memorize

retains grease from 1 to 4 fixtures

Grease trap

Separates and retains deleterious, hazardous, or undesirable matters

Interceptor (Clarifier)

Atleast 3 cu. m. serving one or more fixtures and which is remotely located

Grease Interceptor

rate of flow of individual grease trap

1.3 L/s to 3.4 L/s