Basement floor drains diagram?

Hi, Just bought a house 2 1/2 months ago for the first time and have had nothing but problems with Plumbing. When the washer rinses, water backs up in toilets, shower, sink in 1st floor bathroom in which the washer is located, The kitchen sink also backs up. The 2nd floor toilet and sink are...

I notice the other day that our basement floor has 3 or 4 eight inch square holes in the floor. Most have some type of drainage pipe running through that has been cut (3 or 4 inch cast iron). How can I plug these up? We want to remodel the basement and these holes are in the middle of the floor. ...

Hi! I have torn up the concrete floor in my basement to make changes to the exising drains and vents. We are moving everything about 90* and adding a sink. Attaching a drawing of what I am thinking. Is is ok to run the vents and drains as shown? My picture is not 3-D, but the vents and drains...

How would you cover a hole in the cement basement floor where the washing machine and laundry tub drain into? I assume that there is a pipe that carries the water to an underground sewer pipe. The problem is, you can see the water sitting in the hole and it make the entire basement stink! We would...

I found out I have some concrete mix in the basement floor drains, and the basement floor drains clogged twice in the past year. How do I remove these concrete mix from the drains?