ABS drain pipe question

[Metaldrgn]

I'm no plumber, but this doesn't look right to me. I found that my drain pipe from the kitchen sink to the floor below was cracked lengthwise and leaking (I'll add pictures or another video later). It destroyed the lower part of the drywall in the lower room. Is it common for the drainpipe to be encased in plaster? I think that's what it is anyhow. Can I just use foam to insulate it after I replace it? Do I need to add a vapor barrier? I live in alaska. Any help is appreciated!

[ame]http://www.youtube.com/watch?v=4ae4mU9SVk0&feature=youtube_gdata[/ame]

 

[Chadkingsplumbing]

I don't think your plumber put all that spray foam in the wall. Maybe the general contractor trying to insulate.

 

[Metaldrgn]

The kitchen was redone about 5 years ago and they may have had to adjust the plumbing. Maybe not, but is it normal for them to add plaster to it like that? Again I don't know if they did it or if it was done when the house was built (mid 80's)

Also anyone have experience with flexible (rubber I think) couplers? I have a few in line with it because it's so hard to move things around. Can I just leave it that way and how long do they usually last?

 

[phishfood]

I try to use the shielded couplings, that have a stainless steel band completely wrapping around the neoprene boot. Installed properly, they help to keep the pipe in proper alignment, unlike the all neoprene/rubber couplings, that will allow the ends of the two pipes to misalign with each other.