I am interested in food waste disposer, the model is InSinkErator Evolution 200 premium food waste disposer.

What concerns me is that in the kitchen we have a long horizontal waste pipe under the floor (see the attached picture). So my question is if such pipe could couse problems? F.i. grinded food keeps in the horizontal pipe.


enter image description here

  • Are you sure its really horizontal? Have you put a level on it? The 'normal' slope for a waste pipe that I'm aware of is only about 1 in 50 (1 in 48 if you're working at 1/4 inch per foot). – brhans Aug 23 '16 at 19:29
  • @brhans ok, I am no sure regarding slope, will ask. Anyway - if there is 'normal' slope - could the length of the pipe cause problems? Is diameter of the pipe suitable? – Tadas Šukys Aug 23 '16 at 19:40

With 1/4" per foot (a normal drain line) you should be fine. If the pipe is totally horizontal it may not work well over time as oils , grease soap scum and just normal organic matter will cause backups. 10' with the drop from the disposal may not be a problem even if close to horizontal. Make sure to run water for a little while after the disposal is clear to flush the material down the drain. If greasy stuff use Hot water and you will probably be fine.

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Thats fine if there is the grade like they said, if you have a level look for about a quarter bubble. Or measure to the floor from center of at both ends of the section of the pipe. There should be a 2 and a half inch difference.

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