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Gravity Grease Interceptor Installation Specifications <br /> <br />LƓƭƷğƌƌğƷźƚƓ wĻƨǒźƩĻƒĻƓƷƭʹ <br /> New construction <br /> Remodel/change in operation <br /> Under-slab plumbing <br /> Causing or contributing to an accelerated line maintenance location <br /> Interceptors are not intended for the introduction of domestic sewage <br /> Sample Box Required <br /> Manhole lid access over each baffle tube required <br /> Interceptor located in an area subject to traffic must be HS-20 traffic rated <br /> Alternative materials considered (e.g., HDPE or fiberglass) <br /> Interceptor must have IAPMO approval <br /> Use of cast iron pipe for grease interceptor applications is prohibited <br /> Installed on exterior of building <br />o Avoid drive-thru lanes <br />o Accessible for inspection and maintenance <br />o Minimum 2% gravity flow <br /> <br />