Broken sewer line

My house was built in the 1950's. It is a ranch with a basement. The drains from each of the plumbed rooms (kitchen, full bath, half bath, laundry) run outside of the house and tie into the house sewer main. The kitchen and half bath are on the back side of the house. The line that these two rooms connects to is on the rear of the house runs around the side of the house and ties into the line that runs out of the front of the house and then to the city sewer main. Each line has a clean out in the basement and a cleanout outside the houe that was added later. Original house waste lines (including vents) are cast iron. The line on the backside (exterior lines are clay) has degraded to the point that it needs to be replaced. Waste lines leave the basement through the wall approx. 5 feet from the floor. The rear lines are higher than the front line (gravity flow to the street). Here are the questions:

1. Rather than replace the outside line, I would like to run new PVC from the rear rooms (kitchen, half bath, laundry) and connect to the line that exits the front. Is this advisable?

2. Can I tie the new PVC line into the cast cleanout or do I need to but the original cast to tie in?

3. Vents should be OK. Each room has it's own vent.

4. Can I cap and abandon the old clay line, or will it need to be removed (or is that determined by local code)?

This seems like it would be cheaper than digging up and replacing the outside line. I'd welcome any thoughts.

Tieing in the fixtures that way is fine, don't forget to put in a cleanout. Is the clanout you want to tie into hub or no hub. You need to either remove the cleanout or tie into the line beyond the cleanout with a no hub wye. If possible find where the line you are deleting ties in and remove it and either cap it or put in a cleanout to grade.

It has a hub. I assume I'll need to cut the hub off in order to tie in?

A grinder with a metal cutting wheel works good. you might want to put a wye with a cleanout there if it will be a long run to the other fixtures. You can never have too many cleanouts.

Check with your local code about using a clean out to hook up your drains. Here in Illinois that would noe meet the code.

line

How you run the line is okay. Cutting off the hub may destroy the connection because there is usually not enough material behind it to make a new connection. Going into the cleanout will usually create a very "bulky" installation since you will then have to restore the cleanout after you make your connection. Installing a new fitting and connecting to it will often be a better way.

Thanks for all of the advice. I looked at the clean out again this morning. It's a cast wye with with the clean out extension attached. I can drill out the lead and just pull the clean out off correct?

Ohio Code:

708.6 Prohibited installation. Cleanout openings shall not be utilized for the
installation of new fixtures, except where approved and where another cleanout of equal access and capacity is provided.

I'm not installing any new fixtures, or would the new line be considered a fixture? I guess I need to find out what an approved connection is.

Plumbers in Lebanon Ohio

here's a picture of the clean out

co

What they are saying is that if you utilize the cleanout for any purpose, you have to restore it with another cleanout. By the time you install a combo for the new connection and the cleanout, depending on how you do it the pipe is going to be sticking out into the room a long way. You probably have room between the combo and the wall to install another one for the new connection and make a much neater installation

OK. The tie in makes sense now. Thanks for all of your help. Here's the next question with this project. I removed the drywall box that was covering the lines below the half bath and laundry (picture below). In order for this to work, the new 3" pipe will need to run above the bottom of the length of the joist in order to clear the house beam and HVAC. The run will be the opposite direction from the cleanout in this picture to the other side of the basement and the line pictured above. The existing cast layout won't work b/c it drops too low. Is this possible, or am I screwed on this?

Thanks again for all of your help so far.

joists are 2x10

Here's another angle of the toilet and vent.