Intent 1:
To limit the probability that an inappropriate location
for the fixture traps will lead to:
- an inadequate trap arm length, which could lead to blockage
of vents by solids leaving traps,
- an excessive trap arm fall, which could lead to excessive
siphonic action on traps,
- an excessive trap arm direction change, which could
lead to flow obstructions between traps and vent connections, and
- the evaporation of trap seals due to air movement in
DWV systems.
This is to limit the probability
of vent or trap seal failure, which could lead to the entry of sewer
gases into occupied space, which could lead to negative effects on
indoor air quality, which could lead to harm to persons.