Just had a plumbing company install a dishwasher hookup for us. The location of the dishwasher was not by the sink or the same wall. All the plumbing is underneath in our unfinished basement (see image link below). They ran the dishwasher drain hose into the floor and the drain hose runs around 7 feet before it connects into a trap that then runs into main line from the kitchen sink drain(see gray dishwasher hose into image connecting to trap). The kitchen sink drain is vented underneath with a aav vent. My concern is do I have worry about that trap not being effective, not blocking sewer gases for the dishwasher and it siphoning? Due to there is no vent for the dishwasher and nearest one comes from the main drain line it connects into, being the kitchen sink roughly 10 feet away from where these two join the main going to the left of the image?this run eventually connects into the main line that heads outside to the mound sceptic, they tie into that main line located in that cutout you see in the cement wall entering into that are seen in the top right corner of the cutout.



Thank you!

a licensed plumbing company did that ?

i would have a talk with the local plumbing inspector.

Ya local licensed plumbing company, would you say that the trap would be ineffective?

is the hose inserted into the trap standpipe tightly or just stuck in loosely.
the trap with no vent is very likely to lose its seal when some other fixture is draining.
if the hose is attached tightly , you will not get sewer gas into the house because the hose i long and tall and full of water.

so, it will work. it is not up to code but you will not get sewer gas into your home..

Packy,

Would it have been better for them to just have the dishwasher drain into the washing machine drain/box/standpipe on back wall ?

Looks like it has a AAV.

Curly

that certainly would have been a better option.

I was wondering the same thing as to why they didn’t run it into the washing box outlet drain because it was vented.

Also the dishwasher drain hose comes out of the back of the dishwasher directly into the ground they didn’t do a high loop with it before going into the ground

It looks like that drain line is supported by active romex and conduit. This is an absolute fail on every planet in the Federation. Jokers did that, not professional plumbers.