Cast Iron leak repair

[Joe41561]

Hello all,

I attached a drawing of this. The house is almost 50 years old. I have a small leak in a vertical cast iron pipe in my basement. The cast iron section is about 5-6 feet high from the clean out at the basement floor and joins a 3" copper drain near my basement ceiling that goes all the way up through the first/second floor and attic. This is what I am thinking of doing to repair the pipe, please let me know if it sounds like a good plan.

1) Install riser clamp to secure the 3" copper drain pipe, in case it is not well secured by the original plumbers
2) Cut the copper drain before it transitions to 4" cast iron.
3) Cut the 4" cast iron 2-3" above the cast iron clean out (the leak is about 4" above the cleanout so this is going to be close).
4) Use shielded fernco to go from the 3" copper drain to 4" pvc pipe with a pvc clean out at the bottom (don't want to test fate by opening cast iron clean out in the future) and then a shielded fernco from pvc pipe to cast iron.

What kind of riser clamp and how many should I use for the 3" copper drain? I found a copper epoxy coated riser clamp which I thought would be good to avoid possible corrosion since I've read galvanized metal clamp might corrode with the copper pipe over time. Links below:

Here are the parts that I am looking to use:
Riser clamp:
http://www.supplyhouse.com/Empire-Industries-50CTI0300-3-Copper-Epoxy-Coated-Riser-Clamp

Shielded ferncos:
http://www.supplyhouse.com/Fernco-3...st-Iron-to-PVC-Steel-or-Extra-Heavy-Cast-Iron
http://www.supplyhouse.com/Fernco-3...ing-PVC-Steel-Extra-Heavy-Cast-Iron-to-Copper

Thanks in advance!

 

[Cacher_Chick]

What you are proposing will be fine. It might not be easy to find a banded coupler to transition from 3" copper to 4" PVC.

 

[Sponsor]

 

[Reach4]

I think that the Fernco 3007-43 from his 3rd link or Mission PK-43 would do that.

 

[Joe41561]

A few questions:

1) Is this riser clamp the proper clamp to use for copper (to avoid corrision)?
http://www.supplyhouse.com/Empire-Industries-50CTI0300-3-Copper-Epoxy-Coated-Riser-Clamp

2) How many of them do I need to install? I have access to the 3" copper pipe in the attic, at the second floor and in the basement ceiling.

3) Do the Ferncos I found look correct? I am wondering if there are different sizes of cast iron or if they are all around the same size (house is about 50 years old).
http://www.supplyhouse.com/Fernco-3...st-Iron-to-PVC-Steel-or-Extra-Heavy-Cast-Iron
http://www.supplyhouse.com/Fernco-3...ing-PVC-Steel-Extra-Heavy-Cast-Iron-to-Copper

Thanks!

 

[Reach4]

I am wondering if there are different sizes of cast iron

There are different sizes. Try measuring the diameter with a caliper, or measure the circumference with a tape measure.

 

[Smooky]

If it is leaking in the vertical section, there could be a partial clog below that point that is causing water to back up and leak out. If you have access to the pipe so you can determine exactly where it is leaking, you might be able to try some type of repair clamp or other half-ass repair. You can always cut it out and do a proper repair if it doesn't work.


https://www.zoro.com/smith-blair-repair-clamp-pipe-size-4-in-3-in-l-24500045003000/i/G2356182/

https://www.zoro.com/smith-blair-repair-clamp-full-circle-ss-4-in-22600045012000/i/G2412225/

 

[Jadnashua]

Generally, there are two types of CI...'normal' and 'HD' (heavy duty). The ID is the same, but the OD isn't. ALso, there really isn't a standard for the size of the hubs.