bending stainless pipe without a pipe bender

Deebee · Post by **Deebee** » Sat May 02, 2015 10:26 am

I need to make new filter for the new 100 l pot.
I have some 15 mm stainless tube from the inside og an old water tank. Instead of buying a length of pipe i 5hought i would use what i have . Now i need to bend the pipe so that it curves downwards to the bottom of the pot from the back of the tap.
I dont have a pipe bender and here they are expensive. To be honest buying one for the one small job is not worth it either.
So.. is there a way to bend the pipe without risking folding the walls i ?
The curve is literally a 21 mm downwards slow so not huge.

Post by **themadhippy** » Sat May 02, 2015 10:38 am

fill the pipe with sand to stop if collapsing.

Deebee · Post by **Deebee** » Sat May 02, 2015 10:42 am

themadhippy wrote:fill the pipe with sand to stop if collapsing.

Ok... or similar.. then just bend round something?

Post by **themadhippy** » Sat May 02, 2015 10:53 am

then just bend round something?

A piece of wood with a hole just big enough for the pipe to pass through,it gives you something to bend against

Wonkydonkey · Post by **Wonkydonkey** » Sat May 02, 2015 11:13 am

Make sure you tap down what ever you use, ( so it's more compacted), I saw someone using table salt. Which seemed to work. But I can't remember where I saw ir, ...maybe a YouTube thing

Hope this helps

Pinto · Post by **Pinto** » Sat May 02, 2015 11:44 am

Sand method MIGHT work but at the wall thickness you'll be working with, splitting is a very real possibility. A plumbers pipe bender with a mandrel can bend 15mm stainless tube - do you know of a plumber you could borrow one from ?

cerbera84 · Post by **cerbera84** » Sat May 02, 2015 4:16 pm

table salt worked for me, keep tapping it down and fill the pipe with as much as you can. but don't attempt to rinse it out with water until you've removed most of the salt - I tried to remove salt from my immersion chiller by blasting water into it and it just compacted and was a PITA to remove

Deebee · Post by **Deebee** » Sat May 02, 2015 4:47 pm

cerbera84 wrote:table salt worked for me, keep tapping it down and fill the pipe with as much as you can. but don't attempt to rinse it out with water until you've removed most of the salt - I tried to remove salt from my immersion chiller by blasting water into it and it just compacted and was a PITA to remove

And how did you bend it? Need to make a very shallow curve

cerbera84 · Post by **cerbera84** » Sat May 02, 2015 7:23 pm

I was doing an immersion chiller so I bent mine round a paint can. I thought the madhippy had a good idea with drilling hole through wood and bend against that. To be honest when I did my pickup tube I used two 90 degree elbows. You could always get a 45 degree elbow compression fitting instead of bending anything

tourer · Post by **tourer** » Sat May 02, 2015 9:53 pm

DeeBee, get yourself one of these http://www.screwfix.com/p/plumbing-tool ... oCVn3w_wcB they're cheap enough, but be aware that the spring has to be a tight fit or you will get a kink in the pipe. Been there and i dont know if it's the pipe or the spring.

Wonkydonkey · Post by **Wonkydonkey** » Sun May 03, 2015 8:15 am

tourer wrote:DeeBee, get yourself one of these http://www.screwfix.com/p/plumbing-tool ... oCVn3w_wcB they're cheap enough, but be aware that the spring has to be a tight fit or you will get a kink in the pipe. Been there and i dont know if it's the pipe or the spring.

Have you seen where he is, Norway ! The postage would mind bendingly high.

Pinto · Post by **Pinto** » Sun May 03, 2015 9:46 am

True, but I think that indoor plumbing is quite popular in Nordic countries too

I'm sure that there must be a Norwegian plumber's merchant who could sell him one....

cerbera84 wrote:I was doing an immersion chiller so I bent mine round a paint can. I thought the madhippy had a good idea with drilling hole through wood and bend against that. To be honest when I did my pickup tube I used two 90 degree elbows. You could always get a 45 degree elbow compression fitting instead of bending anything

If memory serves, as long at the diameter of your mandrel equals or exceeds 6x the diameter of your pipe, it should be fairly easy to get a smooth, wrinkle free bend/spiral. Some stainless compression fittings would certainly be the easy route

tourer · Post by **tourer** » Sun May 03, 2015 7:35 pm

Wonkydonkey wrote:
tourer wrote:DeeBee, get yourself one of these http://www.screwfix.com/p/plumbing-tool ... oCVn3w_wcB they're cheap enough, but be aware that the spring has to be a tight fit or you will get a kink in the pipe. Been there and i dont know if it's the pipe or the spring.

Have you seen where he is, Norway ! The postage would mind bendingly high.

No Wonkydonkey i hadn't noticed, but would have thought he could still get one locally?

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bending stainless pipe without a pipe bender

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