My house was built in 1974 I have a pipe outside that is in the brick of the house it looks like a cast iron pipe about 3' or 4' in diameter when I was clothes or drain the sink the water comes out of the pipe and floods my yard how do I fix this the stack is that the black pipes on top of the house I'm new at this ( ha ha)

my house was built in 1974 i have a pipe outside that is in the brick of the house it looks like a cast iron pipe about 3' or 4' in diameter when i was clothes or drain the sink the water comes out of the pipe and floods my yard how do i fix this
Hey Cassie,
City sewer or septic tank? You have a partial blockage downstream from the stack. There should be a cleanout located near the base of the stack. Rent a sewer machine, (see image) and open up the cleanout and send the snake down the line. If you can't locate the cleanout you'll hafta go down the cast iron pipe. If you're on a septic tank there's a very good possibility that the discharge from the washer's too much and the tank needs to be pumped and the filter bed checked out. Good luck, Tom

Tom said it: clogged sewer main. Proceed as he suggested.