33
Note: In applications in which a lot of grease/fat could
enter the pumping chamber, a grease trap should be
installed.
11.2
Odours
Symptom
Possible causes
Solution
Effluent odour directly
outside the house or
inside the house
Pipe connections to toilets /
drains not connected
correctly.
Check that the traps / U - bends in the drains are
fitted and the joints sealed & contain water.
Air vent on pipe work not
fitted or fitted incorrectly on
house.
Ensure all effluent pipes are vented correctly with
vent stacks. Vents are normally fitted to all lines and
they should be higher that the eve of the roof, as per
building regulations.
Pipe work is damaged or
blocked or fitted incorrectly.
Inspect pipe work to ensure it is undamaged and clear
of obstructions or sagging.
Bad effluent odour
directly over the tank
Pipe work to or from the tank
is blocked.
Check the level of liquid in the tank. Ensure the pipes
are not blocked and are fitted correctly to the tank.
Defective pump
Ensure pump is working properly.
Tank vent blocked
Unblock tank vent
Note:
Before taking any corrective action, always positively identify the real source of the odour. Check if the
odour is coming from another outside source such as a storm drain. All pumping chambers vent gases
back through soil pipe and out roof vents. Improperly installed roof vents can cause odour problems.
Traps in drains prevent odours from entering the home. To function they must contain water and be sealed
correctly.
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