Drain pipe lining

Posted by Robert Green on November 6, 2009, 5:17 pm

> Dunno if it's the same technique, but about a year ago the city replaced

the

> main sewer line serving my house.

It doesn't sound like it. They're working on the street behind mine, and I
can feel a lot of vibration, but it doesn't sound like anything breaking up
old concrete pipe. They sent out a notice that described a liner process,
and I believe (but wouldn't swear) that it goes inside the existing pipe. I
should have at least the weekend to do the research and get some sodas to
put on ice to offer to them when they reach here (which will give me an
opportunity to talk to them).

> The line that got replaced was 8" concrete - the replacement line was 10"
> plastic (of some kind). They start at one end of the block and pounded the
> new line through the old one, fracturing the old concrete on the way.

After

> sufficient boom-pause-boom-pause-booms, they reach the end of the block.
> Then they come in with a teeninsy back-hoe, about the size of a riding
> lawnmover, dug down about eight feet, cut a hole in the new pipe and
> connected my sanitary line.

The last time there was water work they killed a 60 year oak tree by backing
into with a backhoe. To their credit, they replaced it with a twig of a
tree that's since died. That's part of why I am worried about the possible
"side effects" of the construction work. My neighbor had it worse: she had
just had a $5,000 concrete driveway installed and it got sliced up like a
salami.

--
Bobby G.

Posted by aemeijers on November 8, 2009, 6:53 am

Robert Green wrote:
(snip)

> The last time there was water work they killed a 60 year oak tree by backing
> into with a backhoe. To their credit, they replaced it with a twig of a
> tree that's since died. That's part of why I am worried about the possible
> "side effects" of the construction work. My neighbor had it worse: she had
> just had a $5,000 concrete driveway installed and it got sliced up like a
> salami.
>

Now that is a good mental note to file away- when you put in a driveway,
figure out what utilities run across it, and mold or cut expansion
cracks at the appropriate spots so it will be easy to patch.

Around here, they try to synchronize sewer/water work with the street
repavings. Makes them feel dumb when the have to cut through year-old
asphalt to replace pipe. Can't always avoid it, due to unexpected
failures (aka shit happens), but at least they try. They seem to just
replace all the driveway aprons with a standard design, if the curbs
have to be redone. Most of the time they do an okay job.

Wish they'd run water and sewer down my street...
--
aem sends...

Posted by Mark on November 3, 2009, 11:22 pm

> Just got a notice from the county that they will be "lining" old drain
> pipes
> in the street rather than digging them up and replacing them.
> Can anyone tell me the pros and cons? I assume this is a "cheapskate"
> method since the local water authority blew all its money on a brand new
> steel & glass hi-rise that was determined to be "excessive" only *after*
> it
> was built.
> Anyway, I am worried that ramming a liner all the way up to my where my
> home's drain line begins is likely to push a huge wad of sludge into my
> drain pipe and leading to my toilets backing up. Of course, they don't
> offer to do the last 20 yards into my home "while they are there" even if
> I
> am willing to pay them the same price per foot that they are charging the
> county. Any input welcome.
> Thanks in advance,
> --
> Bobby G.

They did ours a few years ago and gave us a fairly nice handout about what
they do and how they suggest you prepare. The only thing I complained to
the city about was that they were suppose to leave a door-hanging a few days
before they started, but I never saw one. I did see the trucks in the area
so I prepared.

The main thing I'd recommend is you keep your toilet lids closed. They do
blow air into the lines and that can cause some water to splash out. We
didn't have anything major but I did notice the water level in the toilet
was a little low a few times when they were working in the area.

They didn't offer to do the lines into our homes, if they had I might have
taken them up on it.

Posted by Marilyn & Bob on November 3, 2009, 11:30 pm

>> Just got a notice from the county that they will be "lining" old drain
>> pipes
>> in the street rather than digging them up and replacing them.
>> Can anyone tell me the pros and cons? I assume this is a "cheapskate"
>> method since the local water authority blew all its money on a brand new
>> steel & glass hi-rise that was determined to be "excessive" only *after*
>> it
>> was built.
>> Anyway, I am worried that ramming a liner all the way up to my where my
>> home's drain line begins is likely to push a huge wad of sludge into my
>> drain pipe and leading to my toilets backing up. Of course, they don't
>> offer to do the last 20 yards into my home "while they are there" even if
>> I
>> am willing to pay them the same price per foot that they are charging the
>> county. Any input welcome.
>> Thanks in advance,
>> --
>> Bobby G.

Take a look at www.Insituform.com . Perhaps it will answer some of your
questions.
--
Peace,
BobJ

Posted by Robert Green on November 8, 2009, 1:39 am

> >> Anyway, I am worried that ramming a liner all the way up to my where my
> >> home's drain line begins is likely to push a huge wad of sludge into my
> >> drain pipe and leading to my toilets backing up.

> Take a look at www.Insituform.com . Perhaps it will answer some of your
> questions.
> --
> Peace,
> BobJ

Excellent! It does, indeed answer many of them and more importantly, if the
project engineer ever answers his phone or returns messages, I've got a much
better understanding of the process. At first I thought the name was a
typo, but now I realize it's based on the Latin "in situ" - in place.

I like knowing *exactly* what's going on, how it's done and what the
possible/likely problems are going to be. This information will be helpful.

Thanks for your input, Bob

--
Bobby G.

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