How can I connect a sink, dishwasher, and laundry pump all to one drain?
You need have to have a vent between the washer and kitchen drain and you can't have a running trap in the pipe like that either, I know codes are different all over the U.S. but this is the way we would have to do it according to southeastern builders/plumbing code, been a master plumber for 18 years. Not sure if my drawing is going to post but you need a combo for the ks drain and a combo for washer drain, with a trap and pro vent above the trap on a make shift vent terminated wherever you cab access it in the future. Good luck