Hi... Thinking about moving the washer down in the basement but the main sewer drain leaving the house is about 2' off the floor. There is currently a sewer lift installed for downstairs toilet that complicated cutting into the existing drain for new Y. Without getting to detailed, there is an existing 4" Y with a capped 2" PVC stubb at 56" off floor. I would like to situate the washer about 16 ft away and tie into the existing Y at 56". All plumbing is PVC. My questions are:

What is the required run/rise for this 16' distance.( 2 45's in it also
Do you think Washer will lift the H2o after adding 56" and rise required?
Do I need a P trap?
Do I need to Vent?
Will a veri-vent work?
What are thoughts of letting washer dump into lift ( I'm not a professional but it sounds like a high volume of water for the lift and would rather let gravity do the work)

Appreciate the help.

I am pretty sure it can pump that distance. The problem will be when the pump stops the water left in the drain line flows back into the tub. With a normal short drain line its not enough water to be visiable see but with one that long the water might rise up into the spin basket. A check valve might stop that from happening but would require maintenance to keep it clean and working properly.