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SPECIAL PRECAUTIONS
For Schier Grease Interceptor Installations - Failure to follow this guidance
voids your warranty
Indirect
Connections
If your dishwashing
sink(s) discharges into a
floor drain/sink (drain),
you must regulate the
flow into the drain to
avoid an overflow of
water onto the kitchen
floor. This can be done by
installing a valve or flow restriction cap on the sink piping that
discharges into the drain. See drawing for guidance.
For detailed guidance on indirect connections, go to:
webtools.schierproducts.com/Technical_Data/Indirect_Connections.pdf
High Temperature Kitchen Water
cold water supply line
high temperature
effluent ( > 150º F)
approved backflow
prevention assembly
DTV (drain water
tempering valve)
directly connected
If water is entering the interceptor at excessive temperature (over
150º F), a drain water tempering valve (DTV) and approved backflow
prevention assembly must be installed. Most state and local
plumbing codes prohibit water above 150º F being discharged into
the sanitary sewer. Water above 150º F will weaken or deform PVC
Schedule 40 pipe, poly drainage fixtures like interceptors and erode
the coating of cast iron (leading to eventual failure).
Schier | GB-1000-L Installation Guide
indirectly connected
DO NOT
COMPACT BACKFILL
MECHANICALLY
Compact by
hand only
Installations with Risers
3 FCR2 Risers Max
94"
94"
Corrugated Riser Pipe
Requirements
Riser adapter model CA2 must
be used when installing
interceptors using 24" diameter
corrugated pipe as a riser. This
will adequately embed the
cover adapter in the concrete
slab, preventing cover/cover
adapture failure under traffic
rated loads.
Max Water Level
Risers are not designed
to retain water
CA2
6 - 94"
6 - 94"
page 3 of 9
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