Cutting cast iron from inside?

mike99gtJune 6, 2010

I'm trying to transition from 4" cast iron to ABS using a fernco. The end of the cast pipe is pretty jagged and can't get a good seal with the coupling. How would I go about squaring the end of the cast iron? I've attached a picture to better show the situation. Thanks, Mike

Uploaded with

Thank you for reporting this comment. Undo

The pros always seem to have a nifty answer to this but it might be as simple as breaking up more concrete - most of the time I'm working in brand-new construction and half the time the plumbers are breaking up part of the floor slab!

Seriously, though, I guess there's not enough room for an angle grinder, but I wonder if you could use a Dremel-type tool? I suspect it'd take ages and you want to use adequate face/eye protection as this can be a dangerous procedure.

    Bookmark   June 7, 2010 at 3:33AM
Thank you for reporting this comment. Undo

You could get a 4" angle grinder in there and cut from the inside. A worn wheel would fit better. You can also use a cut-off .045 wheel on the same grinder. That would be my choice.

    Bookmark   June 7, 2010 at 6:14AM
Thank you for reporting this comment. Undo

HD has a flange assembly that slips into the pipe and is sealed with 3 gaskets on the outside. No idea if it's code, but I used one for an upper floor and it solved the problem. Not sure about using it on the ground floor, though.

    Bookmark   June 7, 2010 at 10:15AM
Thank you for reporting this comment. Undo

I just realized you may not be using it for a toilet. Sorry about that.

    Bookmark   June 7, 2010 at 10:17AM
Thank you for reporting this comment. Undo

How big a line are you trying to connect with?

A donut would slip inside the iron pipe and have a hole for the OD of the mating pipe.

    Bookmark   June 7, 2010 at 12:41PM
Thank you for reporting this comment. Undo

Ended up going at it with a dremel and cut off wheel(s). I scored a line and broke the chunks out with a hammer. Made a somewhat clean cut but it took a while. Thanks for the suggestions everyone on to the next part of this never ending project :-)

    Bookmark   June 8, 2010 at 12:10AM
Sign Up to comment
More Discussions
New Water Softener problem (Fleck 5000 ProFloSXT)
Hello, I recently moved into a home that uses well...
Fed up and ready to tackle my well water issues
I've been reading posts trying to educate myself for...
fleck fusion high flow metered water softener
Our Culligan has died and we aint too heartbroken about...
softener is not using up salt
I have hard well water (35 gpg, 0.5ppm iron, pH 7.0,...
Terminox ISM for iron/manganese removal
Hi, I have had a water softener with other assorted...
Sponsored Products
Piazzo 1-Light Cut Glass Wall Fixture
LBC Lighting
Oxford Outdoor Clock with Thermometer
$99.50 | FRONTGATE
QEP Cutting Tools & Blades 24 in. Rip Porcelain and Ceramic Tile Cutter 10630Q
$79.97 | Home Depot
Home Decorators Area Rug: Standard Flokati Red 2' 4" x 4' 6"
$79.00 | Home Depot
WAC Modern Forms | Razor 37 Inch LED Bath Light
$499.00 | YLighting
Crystorama Dawson Nine-Light 29'' Wide Chandelier
Garden Trellis Tiffany Style 25" High Table Lamp
Lamps Plus
Poppy Glossary Rug 5' x 8'
$489.00 | Horchow
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™