The following
will give you a better understanding of the correct
Grease Interceptor configuration. To view larger images,
click on the thumbnail.
Grease
Interceptor – Note manhole covers with
access over influent and effluent “Ts.”
1500 gallon
concrete interceptor
Installation
of Interceptor
Variety
of styles for interceptors - Some do not have
proper
baffle configuration and are poorly designed.
Mid-wall
with slit of
two compartment interceptors
Many
have 6” pipe in mid-wall baffle
PVC
“T” – This is the influent side.
Concrete
style effluent baffle –
Make sure the Effluent baffle or T extends down
to depth of Mid-wall slit or hole or to approximately
one foot of the bottom of tank
The Aluminum
Effluent Baffle collapsed.
Make sure that Effluent T (and Influent T) are
made of sturdy material (i.e. PVC 40).
Baffle
but no effluent T preventing FOG discharge.
Length
that the T extends downward is important, The
T’s on the right are too short for a four
foot deep interceptor. They would need to extend
down to within one to one and a half feet of the
bottom of the interceptor
Even
with 2 manhole access or even 3 manhole access,
some Interceptor designs prevent view of influent
and effluent outlets (or T). Some effluents do
not have a T or baffle or have been installed
incorrectly. Expect approximately 50% of interceptors
to be maintained adequately.
Interceptors
in series (Two 1,500 gallon interceptors).
This is great but they must be maintained just
like other interceptors.
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