Do drains leading into lift pump need vents and traps

[GeorgeH]

My main sewer drain exits the house at about 5 feet above basement floor. There are four drains in the basement (floor drain, laundry sink, washing machine drain, and a pipe that sticks about one foot out of the floor) All of these lead to a pit outside the house (several feet below basement floor level) which has a pump that pumps up to to the sewer line. Do the drains in the basement need to have traps and vents?

I am trying to install a (2nd) washing machine drain onto the pipe that is one foot out of the floor. Any advice on required heights, traps, vents would be appreciated. Thank you.

 

[Terry]

Yes. Any plumbing leading into a sewage basin with pump gets traps and venting.
And the sewage basin gets a 2" vent and a 2" discharge with check valve and gate valve.

The last thing you want is non-trapped plumbing fixtures on a sewage pump. It would be a horrible smell.
And the traps need venting, just like all plumbing is, to prevent those traps from having water pulled from them.