Looking for some advice, I want to stack our washer dryer and move it to the corner of the room, to do this it would require somehow creating a drain solution for the washer. The drain pipe and water outlets are running in front of the wall so I don’t have to cut any dry wall. Right now it empties into a utility sink but there is a 1.5 inch standing drain pipe that we were supposed to use but I preferred emptying into the sink because of the size of the drain pipe.
I want to add a drain pipe 7 ft to the existing standing drain pipe or even just empty it directly into the sink still which I’m sure would be weird but I assume that would just be a pipe open on both sides which could also make it a 2 inch pipe so I don’t have to worry about about flooding.
What is the best way to go about this and would I need extra venting for a 7 ft horizontal slope. Here’s a crappy picture I am imagining. https://imgur.com/a/Reks1R5