Due to tree root problems, I've gotten a few estimates for a sewer line
replacement from my house to the curb.

I have two questions. 1) if it turns out that my existing sewer line is 6"
clay pipe, is there anything wrong with the contractor inserting 4" PVC pipe
through existing clay pipe for some of the installation rather than removing
the existing clay pipe? The reason for doing this would be to avoid having
to tunnel under a staircase that ascends in a direction perpendicular to
the pipe and which is located above the pipe. By inserting PVC pipe through
existing clay pipe, this could avoid damaging the staircase or causing it to
settle. Is there anything wrong with inserting the 4" PVC pipe through
existing 6" clay pipe in a problem section rather than removing the clay
pipe altogether? None of the clay pipe would still actually be used,
since the PVC pipe would simply be inserted through it to avoid a problem
area. All the sewage would flow through the PVC pipe, except that some of
the PVC pipe would be inserted through existing clay pipe. Is this
acceptable?

2) if the existing sewer line is made of metal (cast iron?) and there are no
joints in it between the house and the location where it extends beyond the
staircase (11 feet from the house), would there be any problem with the
contractor attaching a PVC pipe to this location (11 feet beyond the house)
rather than starting at the house itself. The contractor seemed confident
that if the existing pipe is made of metal (cast iron?) and is good shape,
and has no joints, that he could simply attach a PVC pipe to it with a solid
connection (I think he said a 4 band stainless steel) and seemed confident
there would be no chance of root intrusion at that connection. Is it true
that with the proper connection of a PVC pipe to a metal pipe that there is
no risk of root intrusion, or should I insist that the PVC pipe's connection
should begin at the house (and take the risk of potential damage to the
steps by having them tunnel under them)? I think the contractor may have
talked about using a 4 band stainless steel connector rather than a rubber
connector. As much as I'd like to save the steps, avoiding root intrusion
is more important than saving the steps. Should I insist that the PVC pipe
begin at the house or would connecting to the existing pipe be as solid in
terms avoiding any potential root intrusion?

Thanks.

Jeff

"jeff" wrote in message
...
Due to tree root problems, I've gotten a few estimates for a sewer line
replacement from my house to the curb.

(big snip)

1. Will a 4" handle the estimated volume from your house and/or meet local
code?

2. To avoid trashing the steps, is there a painless way to take a different
route out of the basement?

aem sends....