Fixing pipes underneath kitchen sink

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Regina91

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I’m a first time home owner with a real fixer upper! The last year I have diyed just about everything but this is my first attempt at plumbing (other than replacing a toilet). I am replacing my sink (going from a shallow two bowl to a deeper one bowl) and would like to correct the plumbing under the sink. I don’t know the correct terminology to use, but I know this is not the correct way a sink should be plumbed. I’d like to take the time to learn, take it apart and, put it back together with new pipes so it’s done correctly. I’m really confused as to why wastewater must be “pushed up hill.” I have no idea where to even begin, could anyone help me understand what I am looking at and direct me to the best way to get the plumbing in good working order?

Also, I was given a used (but in perfect working condition) dishwasher. I’ve gotten decent with woodwork so I know I could cut the cabinets out next to the sink and get the dishwasher to fit. I also have an existing power outlet I can drop to the dishwater, but with my sink situation do you all think it would be possible to make happen or am
I setting myself up for disaster? It would just be a real treat to not have to hand wash everything!

Other info: This home was a homeowner self-build in the early 70s so much of what he did was not up to code then and definitely not code now.

Thanks very much!
Gina
 

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That’s terrible.

Take a pic of where the drain line enters the wall from the side please.
 
Yes the person who did this did an awful job. Cut out the piping back as far as you can. You need to leave something to attach back onto. Start over with this one.
 
Twowaxhack,

Thanks for your reply! Here are the side views.

That’s terrible.

Take a pic of where the drain line enters the wall from the side please.
 

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JG,

Thanks for your feedback! I am not sure where it is best to cut the piping. Could you give me your thoughts? The drain line comes out of the wall and directly into what I think is a 1/4 bend. At the red line the pipe is just about flush with the wall, could I cut on the green line? Or if I cut at the red line is there a way I can attach a new pipe to a line that’s basically flush with the wall?

Yes the person who did this did an awful job. Cut out the piping back as far as you can. You need to leave something to attach back onto. Start over with this one.
 

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Yeah I would cut as close to the 1/4 bend as you can. You will probably have to cut the drywall out around the pipe so you can get primer and glue back onto it. Before you cut the pipe check to make sure they're is enough pipe to get a trap adapter onto.
 

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