using cleanout for kitchen drain

[qas]

I am installing a kitchen in my basement and want to know if it is okay to use the cleanout as a kitchen sink drain. I will install a fitting so that the pipe can still be cleaned out and be used as a drain. Also will be using a Studor vent to prevent gas seepage.

Any thoughts?

[LazyPup]

If the existing cleanout is in a vertical plane you may attach a sanitary Tee to the existing cleanout with a new cleanout cap on the end of the Tee and your new drain line attaching to the side inlet.

If the cleanout is on a horizontal line you would need to use a Wye &1/8 bend or a combo to attach your new line and put the cleanout cap on the end.

If you are tying into a horizontal line or if you are tying into a vertical stack that does not serve a toilet from above you may not need the studor vent. It would depend upon the length of your new line to the sink.

If you will provide additional information on the layout and length of run I will help you lay it out.

[qas]

Im kinda lost when you refer to horizontal and perpendicular. (i know what they mean but in relation to piping am confused.) The cleanout in my home is at the very front of the house, closest to the street. It is simply a pipe in the ground (4 inches) with no vent. the kitchen sink will be just above it. I know that they sell a fitting at home depot wich will screw into the existing cleanout and provide for a opening that will still allow for a cleanout and an opening (2 inches) that will allow for the kitchen sink to drain to). Since there is not vent (nearest one is 4 inches and about 20 feet away). So I think a studor vent will be necessary.

[LazyPup]

The code requires that you keep the existing cleanout the same diameter.

I have attached an illustrated solution where you can attach your new line to the cleanout while maintaining the cleanout to code spec.

Note the length limits on the top horizontal line. If your horizontal run is equal to or less than the defined lengths you will not need to install the studor vent.

The vertical length is not critical unless it exceeds 40' then you would need to increase the line by one nominal trade size (1-1/2" to 2")

You would need to know whether your local code is based upon either the Uniform Plumbing Code or the International Residential Code.