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Maintenance
Grease interceptors must be cleaned regularly to maintain efficiency; service the
interceptor prior to the accumulated FOG reaching the interceptor's stated capacity
(in lbs.) The frequency of cleaning required is dependent upon the amount of incom-
ing 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 to 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 authorities. Af-
ter 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.
Semi-Automatic Interceptors WD-A, WD-
AH, WD-LA
Function
Watts WD-A, WD-AH, and WD-LA Series semi-automatic grease interceptors are
designed for installation in or adjacent to commercial kitchens. Semi-automatic
interceptors allow for flushing of accumulated FOG from outside the interceptor.
Sizing
WD-A, WD-AH, and WD-LA Series interceptors are sized by flow rate. Standard
hydro-mechanical interceptor sizing guidelines can be referenced in Plumbing &
Drainage Institute Standard PDI-G101.
Air Intake
Flow Control Tee
Draw-Off
Hose
Shut-Off Valve
WD-AH Series
5
Vent
Waste
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