Washer drain/standpipe leaks through wall/floor... how far should the drain hose be inserted into the standpipe?

Hello, This is my first question on here.. I have two bathrooms up stairs and one is leaking so that I can see the water stain downstairs on the ceiling. There's also a seems like some water damage beside the tub wall possibly behind the wall below the faucet level. I was wondering what should...

I take a shower and when the shower dry's I see some water leaking at the bottom where it comes through the wall into the shower at floor. After I saw that I went back and added more teflon tape for the shower faucets and new rubber and new monel seats. I still see a little water draining out the...

I want to ask how much will the plumber charge,if they repair? Can I fix it up myself?If so,how can I fix it up?

The wall standpipe for my 10 year old washer machine overflows as the washer discharges water during the cycle. This problem only happened very recently. I tried to run the snake down the pipe but it only went about 2 feet and couldn't go any further. I also noticed the pipe is very rusty as I...