Smaller pipe: Small PVC pipe sizes (3", 4", 6", 8" and 10”) are usually used.
No manholes: Manholes are not used in vacuum sewers.
Field change ease: Field changes can easily be made
as unforeseen underground obstacles can be avoided by going over, under
or around them, reducing impacts from construction
Less excavation: Installation of smaller diameter pipes at shallow depths eliminates the need for wide, deep trenches reducing excavation costs and the duration and severity of community/environmental impacts.
Only one source of power: Power is only required at the vacuum station. No on-lot power demands exist at valves.
vacuum station replaces multiple lift stations: In addition
to power cost savings, this also means less instances of “not
in my backyard”.
No blockages: High scouring velocities are attained, reducing the risk of blockages and keeping wastewater aerated and mixed.
Operator friendly: The system is completely sealed
and has no confined space issues which protects the maintenance personnel
from exposure to the risk of H2S gas hazards.
Environmentally friendly: The system will not allow
major leaks to go unnoticed, resulting in reduced environmental damage
from exfiltration of wastewater.
Reliable: A standby generator at the vacuum station
ensures uninterrupted service to the customer during power outages.
Smaller treatment plants: The elimination of infiltration
permits a reduction of size and cost of the treatment plant and results
in less power being required.
Pretreatment: The air/sewage mixture enters sewers at high velocity, and the air provides some pretreatment to the sewage inside the vacuum sewers.