UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
TOGGY
 
Posts: n/a
Default Pipe Bending

I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy
  #2   Report Post  
Peter Taylor
 
Posts: n/a
Default Pipe Bending

"TOGGY" wrote in message
m...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


Are you helping the pipe round with your hand? I tried this and it went kinky.
You have to hold only the bender handles.

Peter

  #3   Report Post  
 
Posts: n/a
Default Pipe Bending

Peter Taylor wrote:
"TOGGY" wrote in message
m...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


Are you helping the pipe round with your hand? I tried this and it went kinky.
You have to hold only the bender handles.


Peter


Is it a single kink, or a series of little creases on the inside radius of the pipe ?.

If it is the creases, then try a little WD40 on the straight die part of the bender.


AndyP
--

We were always told that a million monkeys typing for a million years
would eventually produce the works of Shakespeare. Now, thanks to the
Internet, we know this is not true.
  #6   Report Post  
Peter Taylor
 
Posts: n/a
Default Pipe Bending


wrote in message
...

Is it a single kink, or a series of little creases on the inside radius of the

pipe ?.

If it is the creases, then try a little WD40 on the straight die part of the

bender.

What a good idea!


  #7   Report Post  
Martin
 
Posts: n/a
Default Pipe Bending


"TOGGY" wrote in message
m...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


Are you using a pipe bending spring?
If not, you should be.


  #8   Report Post  
Tony Bryer
 
Posts: n/a
Default Pipe Bending

In article , Martin wrote:
Are you using a pipe bending spring?
If not, you should be.


Not with a pipe bender ....

Kinking used to be a problem with some continental-sourced tube but
I've not had this problem in 20 years.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm


  #9   Report Post  
Andy Hall
 
Posts: n/a
Default Pipe Bending

On Mon, 19 Jan 2004 18:04:54 +0000 (UTC), "Martin"
wrote:


"TOGGY" wrote in message
om...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


Are you using a pipe bending spring?
If not, you should be.

Not necessary with a pipe bender.
..andy

To email, substitute .nospam with .gl
  #10   Report Post  
Ed Sirett
 
Posts: n/a
Default Pipe Bending

On Mon, 19 Jan 2004 18:25:35 +0000, Tony Bryer wrote:

In article , Martin wrote:
Are you using a pipe bending spring?
If not, you should be.


IMHO a bending spring is a waste of time.


Not with a pipe bender ....

Kinking used to be a problem with some continental-sourced tube but
I've not had this problem in 20 years.


Is is important that the round dies adnd the straight dies are
all firmly in place (but still with a slight possibility of movement).
Also a bit of lubrication is helpful.
The wheels are worth lubricating also.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html




  #13   Report Post  
PoP
 
Posts: n/a
Default Pipe Bending

On Mon, 19 Jan 2004 20:16:59 +0000, "Ed Sirett"
wrote:

IMHO a bending spring is a waste of time.


They were fine 25 years ago when I bought mine to do my CH system. But
back then you had two types of copper tube - the bendy stuff which was
fairly malleble with thick walls, and the viagra treated stuff with
thin walls that resisted bending.

PoP

Sending email to my published email address isn't
guaranteed to reach me.
  #16   Report Post  
Andy Hall
 
Posts: n/a
Default Pipe Bending

On 20 Jan 2004 15:41:23 GMT, (Andrew
Gabriel) wrote:

In article ,
(TOGGY) writes:

Thanks for all your replies.

Have tried the wd40 trick just as a test but to no avail. How can
i tell if the tube is table x or y? I bought it from the local
William Wilson, which is always pretty busy, so i doubt if it would
be lying around for all that long.


It's sometimes faintly ink-jet printed or dot-matrix embossed
into the surface of the tube. From memory, I think the table
X tube has a 0.9mm copper thickness, sometimes written as
15x0.9 or some such. I've never used table Y tube.

What make pipe bender do you have? Not sure the answer will help
much, unless it's something like Fisher Price ;-) Mine's a
Record one from B&Q a few years ago. I noticed CPC had a special
offer sometime before christmas for one something not much over
£20 IIRC, which looked like a Record one but the picture was
too small to be sure. That would make it half the price I paid
for mine, albeit some years ago.

One other thought -- you do have the separate stright former
pieces don't you? When I was looking in B&Q for one for someone
else more recently, none of the boxes had those pieces in them.
I could imagine people buying the pipe benders and assuming the
roller is supposed to press directly on the pipe -- not sure
what happens if you try doing it like that, but I imagine it
will screw up one way or another :-)


I have a Rothenberger one and it comes with dies for 15mm, 16mm and
22mm. If you use the 16mm one on 15mm tube it mangles it like this.



..andy

To email, substitute .nospam with .gl
  #17   Report Post  
TOGGY
 
Posts: n/a
Default Pipe Bending

(Andrew Gabriel) wrote in message ...
In article ,
(TOGGY) writes:

Thanks for all your replies.

Have tried the wd40 trick just as a test but to no avail. How can
i tell if the tube is table x or y? I bought it from the local
William Wilson, which is always pretty busy, so i doubt if it would
be lying around for all that long.


It's sometimes faintly ink-jet printed or dot-matrix embossed
into the surface of the tube. From memory, I think the table
X tube has a 0.9mm copper thickness, sometimes written as
15x0.9 or some such. I've never used table Y tube.


Will have a good look at my pipe when i get home.

What make pipe bender do you have? Not sure the answer will help
much, unless it's something like Fisher Price ;-) Mine's a
Record one from B&Q a few years ago. I noticed CPC had a special
offer sometime before christmas for one something not much over
£20 IIRC, which looked like a Record one but the picture was
too small to be sure. That would make it half the price I paid
for mine, albeit some years ago.

The pipe bender was my late father in laws. the make is rigid and is
in good nick, dont know how old it is but doesnt appear much more
than a year or so old, looking at its condition probably not even
that.


One other thought -- you do have the separate stright former
pieces don't you? When I was looking in B&Q for one for someone
else more recently, none of the boxes had those pieces in them.
I could imagine people buying the pipe benders and assuming the
roller is supposed to press directly on the pipe -- not sure
what happens if you try doing it like that, but I imagine it
will screw up one way or another :-)


No removable parts on the bender both dies are fixed and following
all the advice hear, scrubbed clean and oiled.
  #19   Report Post  
John
 
Posts: n/a
Default Pipe Bending

On this subject, anybody know of a 'cheap' pipe bender that will only be
used for the occasional DIY/friends job, it will be better than using lots
of elbows etc

TIA

John


  #20   Report Post  
Dave Plowman
 
Posts: n/a
Default Pipe Bending

In article ,
John wrote:
On this subject, anybody know of a 'cheap' pipe bender that will only be
used for the occasional DIY/friends job, it will be better than using
lots of elbows etc


They come up regularly on Ebay and seem to go for about 20 quid. Dunno how
good they are - I've got a Record, and never had any problems with any
tube.

--
*Always remember you're unique, just like everyone else.

Dave Plowman London SW 12
RIP Acorn


  #21   Report Post  
Pete C
 
Posts: n/a
Default Pipe Bending

Toggy,

Putting a pipe bending spring inside will help stop it kinking.

Also try annealing the tube by heating it up and letting it cool
slowly.

cheers,
Pete.
  #22   Report Post  
Dave Plowman
 
Posts: n/a
Default Pipe Bending

In article ,
Pete C wrote:
Putting a pipe bending spring inside will help stop it kinking.


The beauty of a pipe bending machine is you can bend the pipe near
anywhere along its length. Don't fancy your chances of getting a spring
out from the middle of a 3 metre length.

Also try annealing the tube by heating it up and letting it cool
slowly.


It shouldn't be necessary with a machine.

--
*If they arrest the Energizer Bunny, would they charge it with battery? *

Dave Plowman London SW 12
RIP Acorn
  #23   Report Post  
PoP
 
Posts: n/a
Default Pipe Bending

On Tue, 20 Jan 2004 23:48:42 +0000 (GMT), Dave Plowman
wrote:

The beauty of a pipe bending machine is you can bend the pipe near
anywhere along its length. Don't fancy your chances of getting a spring
out from the middle of a 3 metre length.


When I used to use a bending spring (several years ago now) I found
that a straightened out coat hanger did the business. You can probably
also use curtain wire.

However bending springs are 20th century

PoP

Sending email to my published email address isn't
guaranteed to reach me.
  #24   Report Post  
Dave Plowman
 
Posts: n/a
Default Pipe Bending

In article ,
PoP wrote:
The beauty of a pipe bending machine is you can bend the pipe near
anywhere along its length. Don't fancy your chances of getting a spring
out from the middle of a 3 metre length.


When I used to use a bending spring (several years ago now) I found
that a straightened out coat hanger did the business. You can probably
also use curtain wire.


It will depend on the bend, but I suspect the old soft copper didn't grip
a spring like the modern stuff does. Besides, the modern stuff will simply
crinkle if you try and bend it more than a few degrees with a spring.

However bending springs are 20th century


--
*Never put off until tomorrow what you can avoid altogether *

Dave Plowman London SW 12
RIP Acorn
  #25   Report Post  
BillP
 
Posts: n/a
Default Pipe Bending


"TOGGY" wrote in message
m...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


I've put this document together, it might be useful to new users of pipe
benders.
It's an easy method of getting bends in the right place with no wasted
off-cuts.
www.geocites.com/wjp_gof/Bending.doc

BillP











  #26   Report Post  
Pete C
 
Posts: n/a
Default Pipe Bending

Hi,

On Tue, 20 Jan 2004 23:48:42 +0000 (GMT), Dave Plowman
wrote:

In article ,
Pete C wrote:
Putting a pipe bending spring inside will help stop it kinking.


The beauty of a pipe bending machine is you can bend the pipe near
anywhere along its length. Don't fancy your chances of getting a spring
out from the middle of a 3 metre length.


Just tie a length of fencing wire or similar to the spring, pull it in
to where the bend will be, once the bend is made pulling on the wire
will stretch the spring making it's diameter contract and it will come
out quite easily.

Also try annealing the tube by heating it up and letting it cool
slowly.


It shouldn't be necessary with a machine.


True, but if it's a one off then it might be better than a trip to get
another machine or a spring.

Just reread the original post and wonder if it's worth lining the
round 'former' of the pipe bender with a thin strip of rubber, this
might help the prevent inner side of the tube sliding and being
compressed into a kink while bending it.

cheers,
Pete.
  #27   Report Post  
Andy Hall
 
Posts: n/a
Default Pipe Bending

On Wed, 21 Jan 2004 19:07:47 -0000, "BillP" wrote:


"TOGGY" wrote in message
om...
I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy


I've put this document together, it might be useful to new users of pipe
benders.
It's an easy method of getting bends in the right place with no wasted
off-cuts.
www.geocites.com/wjp_gof/Bending.doc

BillP


That's a real help. I ended up deducing something similar last time
I needed to do some accurate pipe installation.

Regarding the kinking, I am sure that I remember that putting sand in
the pipe was one technique to address this, but it seemed a bad idea
in case grains are left behind










..andy

To email, substitute .nospam with .gl
  #28   Report Post  
Peter Taylor
 
Posts: n/a
Default Pipe Bending

BillP wrote

I've put this document together, it might be useful to new users of pipe
benders.
It's an easy method of getting bends in the right place with no wasted
off-cuts.
www.geocites.com/wjp_gof/Bending.doc

BillP



That's brilliant Bill, especially the diagrams. Is there any tips for when I've
pulled a bend too far?

Peter

  #29   Report Post  
Andrew Gabriel
 
Posts: n/a
Default Pipe Bending

In article ,
John Stumbles writes:

I think you'll find the former is a bit loose: if you find a bit of thin
(1mm - 2mm) metal and slip it between the former and the wheel it should
improve matters. Is your bender one of those turquoise colour ones (from
Screwfix or B&Q)? I had one and sent it back as I decided it was crap[1]
and bought a Hilmor from BES instead. I still occassionally get
wrinklies but it's the exception rather than the rule, whereas it was
the other way round with the other.


I've got a Record bender from B&Q, and in spite of heavy use,
I've never had a single wrinkly. :-}

--
Andrew Gabriel
  #30   Report Post  
Dave Liquorice
 
Posts: n/a
Default Pipe Bending

On Wed, 21 Jan 2004 19:07:47 -0000, BillP wrote:

www.geocites.com/wjp_gof/Bending.doc


"This page is not available."

I suspect that you have just used your entire months bandwidth in the
last 4hrs. The power of posting a link in a newsgroup...

--
Cheers
Dave. pam is missing e-mail





  #31   Report Post  
Ed Sirett
 
Posts: n/a
Default Pipe Bending

On Wed, 21 Jan 2004 21:43:20 +0000, Pete C wrote:

Hi,

On Tue, 20 Jan 2004 23:48:42 +0000 (GMT), Dave Plowman
wrote:

In article ,
Pete C wrote:
Putting a pipe bending spring inside will help stop it kinking.


The beauty of a pipe bending machine is you can bend the pipe near
anywhere along its length. Don't fancy your chances of getting a spring
out from the middle of a 3 metre length.


Just tie a length of fencing wire or similar to the spring, pull it in
to where the bend will be, once the bend is made pulling on the wire
will stretch the spring making it's diameter contract and it will come
out quite easily.

Also try annealing the tube by heating it up and letting it cool
slowly.


It shouldn't be necessary with a machine.


True, but if it's a one off then it might be better than a trip to get
another machine or a spring.

Just reread the original post and wonder if it's worth lining the
round 'former' of the pipe bender with a thin strip of rubber, this
might help the prevent inner side of the tube sliding and being
compressed into a kink while bending it.


A Kopex rotary pipe cutter is such a boon but it will make the spring
almost impossible to extract.
My Record bender only kinks (inside ripples) pipe very occasionally which
is always a wake up call to do some maintenance on the bender.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html


  #32   Report Post  
John Stumbles
 
Posts: n/a
Default Pipe Bending

BillP wrote:

"TOGGY" wrote in message
m...

I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.



Anybody any ideas as to what i am doing wrong.


I think you'll find the former is a bit loose: if you find a bit of thin
(1mm - 2mm) metal and slip it between the former and the wheel it should
improve matters. Is your bender one of those turquoise colour ones (from
Screwfix or B&Q)? I had one and sent it back as I decided it was crap[1]
and bought a Hilmor from BES instead. I still occassionally get
wrinklies but it's the exception rather than the rule, whereas it was
the other way round with the other.


[1] with apologies to the inventor of that most useful device for
treansferring 'soil' to sewer for the misuse of his name :-)


I've put this document together, it might be useful to new users of pipe
benders.
It's an easy method of getting bends in the right place with no wasted
off-cuts.
www.geocites.com/wjp_gof/Bending.doc


Excellent! I'll give that a try.

John S
  #33   Report Post  
Pete C
 
Posts: n/a
Default Pipe Bending

On Wed, 21 Jan 2004 23:27:57 +0000, "Ed Sirett"
wrote:

snip

A Kopex rotary pipe cutter is such a boon but it will make the spring
almost impossible to extract.
My Record bender only kinks (inside ripples) pipe very occasionally which
is always a wake up call to do some maintenance on the bender.


What sort of maintenance?

cheers,
Pete.
  #39   Report Post  
BillP
 
Posts: n/a
Default Pipe Bending


"Dave Liquorice" wrote in message
. 1...
On Wed, 21 Jan 2004 19:07:47 -0000, BillP wrote:

www.geocites.com/wjp_gof/Bending.doc


"This page is not available."

I suspect that you have just used your entire months bandwidth in the
last 4hrs. The power of posting a link in a newsgroup...

--
Cheers
Dave. pam is missing e-mail



Hi Dave,

Yep seems to have died.

I've never posted a link before. Is that what usually happens?

If people are finding it useful, can it be posted somewhere else and linked
to from the FAQ site?

BillP.


  #40   Report Post  
BillP
 
Posts: n/a
Default Pipe Bending


"Peter Taylor" wrote in message
...

Is there any tips for when I've
pulled a bend too far?

Peter


HI Peter,

It depends on how far you've over pulled the bend. It's sometimes better to
slightly over pull than under pull. If you under pull, stick the bend back
in the machine and pull the bend further. Don't be tempted to just ease it a
little more out of the machine as it usually caves in all of a sudden and
kinks. If you've over pulled slightly however, you can ease it back to 90 by
just opening the bend by hand.

Some benders have marks on the edge of the round former. Hilti and Record
do. If you've seen these and wondered what they're for, I'll include the
explanation on the Bending.doc, but as Dave has pointed out that link seems
to have died.

The marks are used as followed. Start pulling the bend, if you stop when the
centre line of the pipe is in line with the first mark, you've pulled 30
degrees, c/l pipe with next mark 45 degrees, c/l of pipe with next mark 90
degrees.

BillP


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Does anybody make 10cm pipe that is composed of 'cake slice' sections? Jo UK diy 1 November 3rd 03 01:43 AM
WC soil Pipe hays UK diy 17 October 30th 03 05:21 PM
Soil pipe connection Neil D. UK diy 2 September 15th 03 11:11 PM
pipe bending to make a shower 'rail' NC UK diy 19 August 16th 03 04:32 PM
Converting soil pipe access panel to allow 40mm pipe Scott UK diy 1 August 12th 03 10:14 PM


All times are GMT +1. The time now is 02:44 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"