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Kitchen grinder(disposal) to grease trap

Discussion in 'Commercial Plumbing Codes' started by chris kennedy, Aug 31, 2018.

  1. chris kennedy

    chris kennedy Sawhorse

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    Doing a commercial kitchen and today the plumbers failed an inspection due to the fact the grinder was draining through the grease trap. Inspector said it had to go to sanitary.

    Anyone have a code reference to back this up? Inspector didn't site code.

    Thanks
     
  2. Francis Vineyard

    Francis Vineyard Sawhorse

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    IPC (2012) 1003.3.2 where food waste grinders connect to grease interceptor a solids interceptor shall separate the discharge before the grease interceptor.

    And of course your AHJ may have amended this section or a memorandum of agreement with public works that differ.
     
  3. Flexo

    Flexo Registered User

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    The 2012 IPC "1003.3.2 Food Waste Grinders. Where solid waste grinders connect to grease interceptors, a solids interceptor shall separate the discharge before connecting to the grease interceptor. Solids interceptors and grease interceptors shall be sized and rated for the discharge of the food waste grinder. Emulsifiers, chemicals,enzymes and bacteria shall not discharge into the food waste grinder."
     
  4. chris kennedy

    chris kennedy Sawhorse

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  5. jar546

    jar546 *****istrator

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  6. RJJ

    RJJ Platinum Member

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    Problem is that these small grease traps don't do the job and the code is way behind.
     
  7. mtlogcabin

    mtlogcabin Sawhorse

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    IPC allows it to go to the grease interceptor with a solids separator. The UPC does not unless approved by the AHJ

    UPC 1014.1.3
    Unless specifically required or permitted by the AHJ no food disposal unit or dishwasher shall be connected to or discharge into a grease interceptor. Commercial food waste disposer shall be permitted to discharge directly into the buildings drainage system.
     
    Pcinspector1 likes this.
  8. Pcinspector1

    Pcinspector1 Platinum Member

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    Good inspector, knows his stuff!

    You don't want the bathroom toilet paper and what ever the public flushes going into that GT either!
     
  9. Mech

    Mech Sawhorse

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    Was the grease trap sized for the volumetric flow rate of the pump plus the kitchen fixtures?
     

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