When required, interceptors and separators (including
grease, oil and sand interceptors etc.) shall be provided when, in
the opinion of the Administrative Authority, Allegheny County Sanitary
Authority or Sanitary Authorities, they are necessary for the proper
handling of liquid wastes containing grease, flammable wastes, sand,
glass and other ingredients harmful to the building drainage system,
the public sewer, treatment plant, or processes.
A. Approval. The size, type, and location of each interceptor
or separator shall be approved by the Administrative Authority, and
no wastes, other than those requiring treatment or separation, shall
be discharged into any interceptor. Before installing any special
type separator, a drawing, including all pertinent information, shall
be submitted for approval to the Administrative Authority.
B. Grease interceptors. Grease interceptors where necessary
or required, shall not be located in any kitchen or room where food
is prepared, cooked, mixed, baked, smoked, preserved, exposed, bottled,
packed, handled, stored or manufactured. This provision need not apply
where a semi-automatic draw-off type grease interceptor is provided.
No food waste grinder unit shall be connected to any grease interceptor.
C. Venting interceptors. Interceptors shall be so designed
that they will not become air bound if closed covers are used. Each
interceptor shall be properly vented. Oil or other flammable waste
separators shall be provided with a three inch vapor vent extending
from the top of the separator and terminating independently in the
open air at an approved location at least 12 feet above grade or as
approved by the Administrative Authority.
D. Interceptors and separators to be readily accessible.
Each interceptor and separator shall be so installed that it is readily
accessible for removal of cover, servicing and maintenance. Need for
use of ladders or moving bulky objects in order to service interceptors
shall constitute a violation of accessibility.
E. Maintenance of interceptors, separators and grease
traps. Interceptors, separators and grease traps shall be maintained
in efficient operating condition by periodic removal of accumulated
grease, scum, oil or other floating substances and solids deposited
in the interceptor, separator, or grease trap. When grease traps are
installed, a maintenance schedule and records, including that hauler,
shall be kept on the premise and made available upon request to the
Administrative Authority.
Backwater valves, when required by other sections
of this code or used on fixtures subject to backflow, shall be installed
in accordance with requirements of the Administrative Authority.
A. Fixture branches below grade. Backwater valves shall
be installed in the building drain branch which receives only the
discharge from fixtures connected to branches which are located below
grade and subject to backflow.
B. Materials for backwater valves. Backwater valves shall
have all bearing parts of corrosion resistant material.
C. Construction of backwater valves. Backwater valves
shall be constructed so a mechanical seal against backflow will be
provided.
D. Diameter of backwater valves. Backwater valves, when
fully opened, shall have a capacity not less than that of the pipes
in which they are installed.
E. Location of backwater valves. Backwater valves shall
be installed so their working parts will be accessible for service
and repairs.