Hi All
one of my cline has recently changed his double drain sink with a single drain sink.
I now need to redo all the plumbing to allow for single drain usage.
I am having a hard time trying to find what is the proper way to install the disposal and dishwasher to a single drain,
and at the same time what is the proper layout of the PVC piping.


we will highly appreciate your feed back.
Thanks in advance

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rainwater harvesting systems

James can you send a pic of the sink area you are working in?

Pat

The disposal should have an access port on the side that the dishwasher discharge line would connect on to. Note: Make sure that you punch-out the port so that the water can flow into the disposal. A qualified and licensed plumber should be able to do this in short order.

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Scott Patterson
Spring Hill, TN
http://www.traceinspections.com

In Illinois the dishwasher is not to be connected to the garbage disposal unit.

Section 890.770 Dishwashing Machines

a) Domestic Dishwasher (Private Residence). When a domestic dishwashing machine drain line is connected to the house side of a trap from a sink, the drain from the dishwasher shall be carried up to the underside of the spill rim of the sink. Dishwashing machines shall discharge separately into a trap or tail piece of the kitchen sink and shall not connect to the food waste disposal unit.

The way I plumbed in a single basin sink with a dishwasher and garbage disposal. Is two p-traps. The trap off the disposal is the easy one. The dishwasher one you need to make a fitting out or copper that increases from the discharge hose size to the size of the trap. I wish I took pictures to share with you.

Best thing to do is call your local plumbing inspector and ask him his preferred way of doing it. Every township I have done work in the different plumbing inspectors wanted it done their way, which still met the Illinois code.