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Default Cast Iron Soil Stack replacement

Hi,

I have a cast iron soil stack that is cracked badly a length of about
5 feet. The crack goes from the top of one section to the bottom of
that section. The other sections seem fine above and below.

I would like to replace with PVC. It is a straight shot from the
basement up through the first floor and to the second story bathroom.
Ther are no other conections on first floor or basement.

The problem is BELOW where the toilet / bathtub / and bathroom sink
meet at the stack, so I just have to replace a strait length of pipe
down to the basement.

1. How do I loosen the conncetions between two pieces of cast iron so
I can take out this damaged section and the 2 sections below it. Heat
the lead and Oakum and twist the sections apart?? Will that get the
pipe sections seperated? How is it best done?

2. How do I reconnect PVC to this cast iron piece.

3. Do I need to support it from above? Can I grab ahold of the vent on
the roof with a clamp and thus support the stack above the cut?

Click here for pictures: http://trillionfive.com/plumbing.html

Any other advice!?? Thanks guys!!!

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Default Cast Iron Soil Stack replacement

opps here is link. Click below.

http://www.flickr.com/photos/31219867@N00/

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Default Cast Iron Soil Stack replacement

On Jun 3, 9:13?pm, slindsey3000 wrote:
Hi,

I have a cast iron soil stack that is cracked badly a length of about
5 feet. The crack goes from the top of one section to the bottom of
that section. The other sections seem fine above and below.

I would like to replace with PVC. It is a straight shot from the
basement up through the first floor and to the second story bathroom.
Ther are no other conections on first floor or basement.

The problem is BELOW where the toilet / bathtub / and bathroom sink
meet at the stack, so I just have to replace a strait length of pipe
down to the basement.

1. How do I loosen the conncetions between two pieces of cast iron so
I can take out this damaged section and the 2 sections below it. Heat
the lead and Oakum and twist the sections apart?? Will that get the
pipe sections seperated? How is it best done?

2. How do I reconnect PVC to this cast iron piece.

3. Do I need to support it from above? Can I grab ahold of the vent on
the roof with a clamp and thus support the stack above the cut?

Click here for pictures:http://trillionfive.com/plumbing.html

Any other advice!?? Thanks guys!!!


first if the cast iron carries waste water thru a living area
replacing with PVC will make water passages amazingly loud. unreal how
loud PVC is

you need to support the cast iron above and below the cut. you DONT
want anything to move and not only leak indoors but perhaps create a
roof leak, strap and support it well before beginning cast is very
heavy better safe than sorry.

you can easily use ferncos to join new PVC or cast iron lengths
together. today they use hubless cast iron, basically cast iron with
ferncos.

Cast cuts easily with a sawzall or specialized cutter, if the
balance is OK just replace the bad area.

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Default Cast Iron Soil Stack replacement

On Jun 3, 8:13 pm, slindsey3000 wrote:

1. How do I loosen the conncetions between two pieces of cast iron so
I can take out this damaged section and the 2 sections below it. Heat
the lead and Oakum and twist the sections apart?? Will that get the
pipe sections seperated? How is it best done?


It's very hard to get the joints apart even when one end is free. If I
understand your situation, both ends of this section are joined. Even
if you could loosen the joint, how would you get the section out? I
would suggest renting a chain cutter made to cut cast iron pipe. They
are quite heavy and require some clearance around the diameter of the
pipe for the chain and cutters to go through. But once you get them
hooked on they will allow you to cut the pipe pretty quickly. I would
remove the bell on the non damaged section of pipe, it will be easier
to install the repair.

2. How do I reconnect PVC to this cast iron piece.


They are called Fernco fittings. They are like a piece of stiff rubber
hose with two hose clamps. You slide the hose over the cast iron,
tighten the clamps.


3. Do I need to support it from above? Can I grab ahold of the vent on
the roof with a clamp and thus support the stack above the cut?


Yes, it needs to be supported above the cut, but you can't support it
on the roof. It is normally supported by a riser support, here's a
pictu http://www.pipingtech.com/products/p...lamp/fig90.htm
There is most likely a riser support in place that you can't see near
the bottom of the stack, but once you remove a section above it, all
the weight going up and out the roof needs to be supported. So you
need to get another riser in place above your damaged section before
you start cutting it out.


Click here for pictures:http://trillionfive.com/plumbing.html

Any other advice!?? Thanks guys!!!


It would be easy to do a lot of damage or get hurt doing this. If you
have the stack exposed you might consider brining a plumber in to
replace it.


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Default Cast Iron Soil Stack replacement

wrote:
On Jun 3, 9:13?pm, slindsey3000 wrote:

Hi,

I have a cast iron soil stack that is cracked badly a length of about
5 feet. The crack goes from the top of one section to the bottom of
that section. The other sections seem fine above and below.

I would like to replace with PVC. It is a straight shot from the
basement up through the first floor and to the second story bathroom.
Ther are no other conections on first floor or basement.

The problem is BELOW where the toilet / bathtub / and bathroom sink
meet at the stack, so I just have to replace a strait length of pipe
down to the basement.

1. How do I loosen the conncetions between two pieces of cast iron so
I can take out this damaged section and the 2 sections below it. Heat
the lead and Oakum and twist the sections apart?? Will that get the
pipe sections seperated? How is it best done?

2. How do I reconnect PVC to this cast iron piece.

3. Do I need to support it from above? Can I grab ahold of the vent on
the roof with a clamp and thus support the stack above the cut?

Click here for pictures:
http://trillionfive.com/plumbing.html

Any other advice!?? Thanks guys!!!



first if the cast iron carries waste water thru a living area
replacing with PVC will make water passages amazingly loud. unreal how
loud PVC is

you need to support the cast iron above and below the cut. you DONT
want anything to move and not only leak indoors but perhaps create a
roof leak, strap and support it well before beginning cast is very
heavy better safe than sorry.

you can easily use ferncos to join new PVC or cast iron lengths
together. today they use hubless cast iron, basically cast iron with
ferncos.

Cast cuts easily with a sawzall or specialized cutter, if the
balance is OK just replace the bad area.


Echoing what hallerb said.

If noise (dripping/sloshing) will be annoying,
forget the PVC. Use new hubless cast iron pipe.

You can not heat the lead out of that top hub
(without burning house down). There isn't access
above to drill it out either. Consider making a
saw cut vertically thru the bell and then splitting
it open, like a melon.

Support is vital. If the stack above shifts even
a small amount, you may disturb the bath connections
enough to have a major leak on your hands.

This is very tricky work; plan, plan, plan...

Jim
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