I'm installing a sink, faucet & garbage disposal. Got the sink in, new shut
off valves, faucet installed & working, all fine so far. BUT the new sink's
drain hole is in a different position that the old one, basically right
above the ABS drain line as it runs under the sink to where it had attached
to the old drain (new sink is single bowl, old was double). There is not
enough clearance between the drain line & sink bottom to fit the disposal,
so I need to re-route the drain line. There's a white ABS stub (it's white,
I'm assuming it's ABS. House is about 30 years old) sticking out of the
wall about 2-3 inches, not much exposed. Black plastic pipe is glued to
this to form the old drain line. Ideally, I would like this old black line
to "disappear", leaving the bare stub, to which I would glue a new line
routed as I need. I've never dealt with this kind of pipe before. How d I
remove the black section from the white stub, leaving the stub as long as
possible & ready to receive the new drain? Any tips as to working with this
Can't answer your question about how to deal with that pipe, but wanted to
point out that it's important to be sure that the drain pipe (the one coming
out of the wall) needs to be below the drain outlet of the disposal. If the
drain pipe is above the disposal outlet, there will always be a level of
water (sewage, really) sitting in the bottom of the disposal. This 1) stinks,
and 2) rusts the innards of the disposal. Disposals weren't meant to have
water sitting in them.
Your installation instructions may have mentioned this, maybe not.
The black plastic pipe you talk about must be polyethelene pipe. Poly
pipe can be easily cut with a hand tool designed for that purpose.
It is the same type of tool used to cut any type of plastic pipe.
Looks like a pair of scissors and has one sharp blade, not expensive,
makes a nice square cut. Link:
If the clearance don't allow for that tool then you can use a
reciprocating saw or even a hacksaw. If you decide you don't want to
cut it then any kind of fittings are available for poly pipe.
Thanks for the replies. I got it together using the stub sticking out of
the wall which existed after I hacksawed the elbow off that was there.
There was JUST enough. As Lawrence said the black pipe is PVC. 1st time
I've dealt with it, the primer & glue routine (nasty stuff!) though I've
seen it done countless times on home shows. Everything works great, looks
great & NO LEAKS! And the disposal drain was plenty high - I had to buy an
extender for the outlet tube for it to reach low enough!
As Lawrence said the black pipe is PVC.
Glad you got it fixed but I did not say that. I said that it sounded
like poly pipe which is quite a lot different stuff. Now that I
review your post I realize that you are talking about your waste line
in which case I was not right about anything. I wish I was. Let's see
if I can be right about something.
All plastic WASTE lines regardless of what it is named or what color
it is can be put together with the primer and glue you mention, cut it
any way you like.
If it were your SUPPLY lines we were talking about then it would
matter exactly what type of plastic pipe we are talking about and my
post would perhaps have made more sense.
There are two type of SUPPLY piping that are commonly called "black
pipe". One is steel pipe which isn't used so much anymore for water
supply but often still is used for gas supply lines. It is threaded
together with pipe tape or pipe dope.
The other is polyethelye pipe which is the cheapest stuff and is put
together with clamps or bands. Poly pipe is highly durable however
and is used in underground applications. It is also used anywhere
cost is the primary concern. I know that doesn't help but hopefully
it is factual.
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