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INTERCEPTORS
EXTENSIONS (Bolt-On & Integral)
Extensions should be specified on grease and oil
interceptors when the interceptor is buried in the ground,
vertical adjustment of the interceptor is necessary to
meet the drainage piping, and/or floor level access
requirements. Extension heights range from four inches
to any maximum practical for serviceability. Extensions in
excess of 20" are not recommended. One must consider
the slope of the drainage piping from the fixtures to the
inlet of the interceptor. Typically, allow a slope of ¼" per
foot in the drainage pipe. Therefore, there will be many
installations, especially with large interceptors, where
the sloped drainage pipe ends up below the inlet
connection. An extension is added to the top of the
interceptor so that the inlet can be lowered to meet the
incoming drainage pipe and the lid of the interceptor can
be extended to floor level.
Wade offers three different kinds of extensions: integral,
bolt on and cover shrouds. An integral extension is
specified by expanding the "H" dimension on the
interceptor. The "H" dimension is from the center of the
inlet and outlet to the top of the interceptor. One would
specify a "H" dimension to meet the job requirements
and the interceptor will be manufactured to that
specification. The extension is incorporated into the
production of the interceptor to produce a seamless,
integral interceptor.
A second method of providing an extension is a bolt on
design. In this example, a top is manufactured out of the
same material as the body. The extension is secured to
the body by means of bolts bearing against its base
flange, compressing the sealing gasket to complete the
union. The regular lid is bolted to the extension top in the
same manner as it would be to the body of a standard
interceptor.
SHROUDS
Cover shrouds incorporate either standard or draw-off
grease interceptors mounted on adjustable elevation
cradles in either open or closed bottom housings with
non-skid floor level lids. The cover shroud is adjustable
and is recessed into the slab to house the interceptor.
Cover shrouds are particularly important where below
floor level installation of draw-off grease interceptors is
required, because such models cannot be installed
independently with tops at the finished floor level.
9
Wade Drains ‐ 11910 CR492, Tyler, TX, 75706 ‐ Phone: 800‐638‐9537 Fax: 888‐879‐9233 ‐ www.wadedrains.com
3‐29‐17
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