My parent left me this house and she hadn't even had her

>>1019326
unclog drain.
Plunge first, that may do it (get a sink plunger).
If that doesn't work, then I would suggest a snake rather than a chemical, but that's just me.

I have a dishwasher that does the same thing: when it flushes out all the water, the sink it's connected to backs up for 20 seconds or so.
It still goes down tho, because my drain isn't clogged.

>>1019326
You used the correct connection, I assume? Basically an upside down "Y"? If so, like anon said, snake out the drain, or check the p-trap and replace/clean if blocked.

was it working before? was it already clogged? if so for how long?

snake is the way to go

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>>1019481

Not OP

But, depending on the age of the house and condition of the pipes, a snake won't cut it.

This is what my 1930's house plumbing looked like

>>1019662
what is that shit, rust or grease?
I have a vintage honda, been sitting for 15 years and when I cut the fuel lines they looked like that.

>>1019662
wtf!

>>1019944
probably rust(steel pipes) + grease + random other shit. if a drain doesn't get used very often or you don't deal with it when the starts getting clogged up things will settle and that's what happens

>>1019662
is that mud?
>vomitchan.png

>>1019662
wow..

>>1019326
First clean the drain lines, then do some reading on plumbing a dishwasher and make sure it is plumbed correctly. It won't drain right if the pipes or standpipe are undersized, and it needs an airgap to be safe.

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>>1019944
>>1019961
>>1019964
>>1019990

I have no idea but I just went through all of the usual plumbing fixes and that's what I found when I said "fuck it, I'm cutting it out"

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>>1020028

It went from a 2 inch trap to a 1.5 inch then dumped into the 4 inch cast iron main drain. I spent all of yesterday fixing this WW2-era abortion

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>>1020029

One more because it works so much better and was worth the day off from work

>>1020028
>>1019662
Are those steel pipes with brass fittings? I was always told to never mix different metal pipes without a dielectric fittings as it causes corrosion to build up in the pipe otherwise. I guess they were right.

>>1020066
>I was always told to never mix different metal pipes without a dielectric fittings as it causes corrosion to build up in the pipe otherwise. I guess they were right.
You were told correctly. It's usually called "galvanic corrosion".
https://en.wikipedia.org/wiki/Galvanic_corrosion

For typical home-plumbing use, the easy way to remember is that pipes and fittings of different metals can be used but they must never touch directly. You must put a plastic fitting or pipe in-between them.

>>1020082
>https://en.wikipedia.org/wiki/Galvanic_corrosion
They actually can touch without corrosion, but they cant have an electrolyte between them. You could have a piece of dielectric piece between dissimilar metal, but if the whole thing is flooded with an electrolyte like water then it will corrode. That is why an anode take in a water heater works.

>>1020034
is that steel wool wtf

>>1019326
>no disposal

It doesn't need one.

>>1020162
It was probably stuffed into the holes around the main pipe to stop rodents from entering.

>>1020162
>>1020166

Yeah it seems there was a rodent problem a few years back, no evidence of it now so I took out the wool but left the poison cartridge (just in case).

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Not to bump an ancient thread but here's a better pic of the plumbing. -op