Chapter 112 Flashcards
When externally located the trap should be within how many millimeters from the fixture?
610 mm
A pipe which usually prevents the accumulation of ground water around the buildings foundations?
footing drain
How can waste gases be pushed back into the building through traps?
Positive pressure in the drainage system
Branch lines should not meet at angle greater than?
45 degrees
Materials often used for indoor sanitary drainage systems are:
Cast iron, galvanized steel and copper
Horizontal branch lines must have a adequate slope to maintain a minimum flow velocity of?
0.6 m/s
How many water does a toilet tank flushometer deliver every 10 seconds?
13.7 L
How often should a water storage heater be drained, cleaned and inspected?
Annually
A pipe used to reduce hydrostatic water pressure on the walls below ground level is called a?
Footing drain
Drawing out of sealing liquids in traps in a drainage system is due to?
Negative pressure
How many basic styles of flushometers are there?
2
How many valves are there on a toilet flush tank?
2
What is the purpose of providing an air fusion in a water system?
Prevent water hammer
