It goes into the main sewer system. It will go through your sewer system and then out to the main sewer. That is if you live in town!
washer drains lent filled water comes up into tub
to the sewers
my washer keep on by passing the spin cycle and will not drain out the water.
To get water to it, and to have it drain
The drain from the washer to the main line is getting plugged and the floor drain is easier. Drain cleaner in the floor drain should take care of it.
Simple, there is somthing clogging you drain or YOUR WASHERS BROKEN GET A NEW ONE
Kitchen sink and washer use same drain line. Drain line clogged causing backup of drainage from washer into kitchen sink. Have drain line unclogged to take care of problem. If drain line not clogged, check for proper venting of drain lines.
It depends on what kind of washer you have! Normally the water will drain on it's own, though it takes time because the drain doesn't suck it in or anything - it just drains out on it's own; but it still depends on the type of washer you have. If there isn't a drain in the bottom then you'll probably have to scoop it out or something, which is probably some back-breaking work. Check if your washer has drains in the bottom.
Of course
A drain plug washer is not necessary unless you have oil leaking from the drain plug.
Sounds like a venting problem. The washer is trying to push the water down the drain and the tub is an easier route. When it stops pumping, the washer drain become the vent and lets the air escape. You can try some drain cleaner in the tub and the washer drains. This may open it enough to help.
Connection of the washer drain hose to the tub drain is very important. This will help prevent leaks for example.
You have to use toilet more
Usually there is a gap around the washer hose that lets enough air in that it does not need a vent.