Double sink, disposal, dishwasher, 70s house - was this done correctly?

[pkirkovsky]

Hello!

Our kitchen sink recently developed a small drain leak due to old & cracking fittings, and I'd like to do an overhaul.

After looking at some posts about this setup, I am starting to wonder whether the plumbing was done correctly when the house was built. Based on other posts it seems that the drain setup we currently have may be needlessly complex.
Is this the case? If so, what's the best way to remedy it?

Thank you!

(disposal is a Kenmore 60581, if that's important)

 

[Kowalsky]

In my opinion and knowledge thare shoul be separate trap for that disposal because now it is shared with right side of the sink. When you turn the disposal on the majority of the discharge can run accros that T and up to the bowl. Plus separate P traps are by the code. Also I would disconnect that dishwasher from the disposal and connect it to branched taipiece installed under the right side of the sink. Many states prohibit DW draining directly to disposal. So ..... left side from the sink: disposal, trap. right side of the sink: tailpiece with barbed DW branch (7/8 or 5/8), trap. Both traps should meet at the same level and join at the T or perhaps Y and that T or Y should enter the wall drain. Use extensions when posible and needed, and dont forget to cap the disposal DW inlet hole. Connect DW drain hose to that tailpiece and clamp it. Some states may require air gap device for proper DW drain connection. Good luck. I just realized that your post is from over a month ago