WD-H Series interceptors are designed to be suspended in an upper floor. The
housing depth is adjustable; locate the holes along the sides of the housing to
achieve the required piping elevation. Adjust the flanges on the interior of the
housing to the desired height and secure them with the hex bolts and nuts provid-
ed. Pour the interceptor housing into a minimum 4" concrete slab and suspend the
interceptor by positioning the side interceptor flanges above the housing flanges.
Tighten the flanges in place to suspend the interceptor.
PDI Certified interceptors are shipped with a vented flow control fitting which is
packed inside the interceptor. The flow control must be installed in a horizontal
position prior to the grease interceptor, and as close as possible to the underside
of the lowest fixture served. For multiple fixture installations, a single flow control
should be used.
The flow control air intake (vent) connection should be terminated or re-vented a
minimum of 6"(152) above the flood rim of the sink. The interceptor outlet side dis-
charge line should also be vented to retain a water seal and prevent siphoning.
Pipe connections are either no hub or IPS. Make no hub connections with a suit-
able no hub or transition coupling (by others); IPS connections are made with an
IPS nipple (by others) corresponding to the interceptor's connection size.
Please reference Plumbing & Drainage Institute Standard PDI-G101 for additional
single and multiple fixture installation requirements and diagrams. All installation
recommendations are subject to approval of the local code authority.
Maintenance
Grease interceptors must be cleaned regularly to maintain efficiency; service the
interceptor prior to the accumulated FOG reaching the interceptor's stated capac-
ity (in lbs.). The frequency of cleaning required is dependent upon the amount of
incoming FOG and the capacity of the interceptor. Typical cleaning intervals can
vary from once a week to once in several weeks, and it is good practice to establish
a regular schedule once the frequency has been determined.
To clean the interceptor, remove the bolt(s) securing the top cover and remove
the cover. The separated FOG will have accumulated at the top of the interceptor,
above the static water line. FOG should be removed manually or by an appropriate
service into proper containers and disposed of in a manner suitable to local author-
ities. After removing the accumulated FOG, evacuate the interceptor completely to
remove any debris that may have accumulated at the bottom of the interceptor.
Prior to replacing the cover, make sure the inlet, outlet and internal air relief are free
of obstructions, and inspect the cover gasket for damage or potential leak points.
Fill the interceptor with clean water prior to resuming use.
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