On 4/19/2018 10:39 PM, Bob F wrote:
On 4/19/2018 5:29 PM, wrote:
On Thu, 19 Apr 2018 20:06:07 -0400, Frank "frank wrote:

On 4/19/2018 12:24 PM, wrote:
On Thu, 19 Apr 2018 08:24:04 -0700, Bob F wrote:

On 4/19/2018 7:52 AM, trader_4 wrote:
On Thursday, April 19, 2018 at 10:47:28 AM UTC-4, JBI wrote:
I am a student and need to be able to custom cut a thin piece of PVC
pipe of the kind found in bathroom drains, which is a lot thinner
than
sch 40.Â* I am doing this for an art project so I will need to cut
precise holes into it as well as just plain cutting of the ends.Â* Is
there something cheap I can use indoors to do this?Â* So far, I
tried a
really large, kitchen knife but it wouldn't begin to cut through the
pipe.Â* I also tried a multi piece Xacto knife set with many
different
blades, but broke the first blade trying to get through it.
Thanks in
advance for any help.

To cut it, they have a hand held PVC pipe cutter that is
essentially a knife
combined with a holder and two grips that you squeeze.Â* That will
give you clean cuts.Â* To make a hole,
I haven't done that, but I would try using a heated pointed object,
eg nail tip, to first make an indentation as a starting point,
then use a hand held drill.


Those under sink pipes are a lot harder, thinners and more brittle
that
PVC pipe. I seriously doubt if any knife blade is going to cut them
without many repetitions of a blade tip scraping away a bit at a
time. A
fine bladed saw would be a much better bet. Try a hacksaw or coping
saw.

If they are new pipes, a sharp PVC cutter goes right through them but
once they get old and brittle, like you find under a sink, I agree,
wear eye protection because they will shatter.

I hear that CPVC pipe used for hot and cold water plumbing is very
brittle but drain pipes are normal PVC which I would cut with a hacksaw.

It is pretty much the same plastic and it all gets brittle with age.
Sunlight hastens that if the PVC is not UV protected.
You can almost tie a knot in a brand new stick of sched 40. It will
certainly bend more than 360 degrees without breaking.


In mu experience, CPVC pipe that sees a lot of hot water flow gets very
brittle after 20 years, and cannot then be cut with a PVC pipe cutter.
It just splits when the cutter is pressured enough.

The C in CPVC signifies PVC that is crosslinked. I've never used it but
neighbor told me had had replace his copper pipes with it and working
under the sink pulled on a piece to support himself and it just broke.