How to bend PETG tubing

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what's up guys JC cents here we're going

to do a video that I've been asked to do

a bajillion times like literally a

bajillion I counted you guys have been

asked me how to do hard line tubing

tutorial and I didn't want to just take

random tube and start bending it for the

sake of a tutorial I want the tube to go

in something so I decided that we need

to go ahead and do an upgrade to coconut

monkeys computer because if you guys

remember I did a tutorial about how to

install a basic water cooling kit and we

use the Alpha cool loop and

unfortunately alpha cools tubing and

radiators are the radiators good it's

just it has a ton of flux in there

and as you can see the clear fluid and

clear tubing has turned a lovely shade

of aquamarine we don't want that so

we're gonna go ahead and do a hard-line

tube upgrade to his system and I figure

would show you guys how to do it in the

meantime today I'm going to show you

guys how to do some hardline bending

tutorials but speaking of tutorials if

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hard alright so how to bend hardline you

know we'll start with this there are two

types of hardline tubes out there there

is PT G and there is acrylic both of

them have their pros and both of them

have their cons I'm not going to get

into that I've already done a video on

that go and check it out click the

little magnifying glass on my channe

and just look up PE TG and you will find

any video about hardline now PT G and

acrylic both have their pros and their

cons if you guys want to know more about

that check out the video I did on that

will keep this video a watchable length

and not get too in-depth on that but

basically PT G is just plastic and fused

and kerlick which makes it much more

flexible as you can see it's not going

to crack it's easy it's easier to work

with it melts and bends at a lower


I say melt but really that's what you're

doing when you bend it as you're melting

it and you're keeping its shape by

inserting some sort of a silicone insert

which is what we've got right here I've

got two of these one is sanded down one

is knots and basically that's just

because there's some tolerances between

the two I like the etg because it's also

very prone to not breaking and

shattering which right there if I did

that with acrylic would have broken in

fact I've got proof of that right here

because you can see that these are like

all chipped and broken on the end

because if right now if I was to do that

a piece would probably fly off hit

coconut monkey in the face then he will

sue me and my insurance rates will go up

he'll become rich and that's not the

point of today's video but when it comes

to bending there are some tools that

you're going to need I like to keep

things really really simple and basic

some guys like to do the saw method

monsoon mm PC tech a lot of companies

sell tools that you guys can use to cut

this stuff but I like to keep it really

really simple this right here is a

cobalt I got it from Lowe's obviously

because it's cobalt this is a two pipe

cutter and they have different types of

blades you can put in here but I just

wouldn't got this it's like $9.99 it's a

pipe cutter and it's the same thing you

would use to cut copper pipe it works on

ptg you can't use it on acrylic though

in fact let me demonstrate why let me

grab a piece of acrylic here because I

don't really use this stuff anymore if I

try to put this on acrylic the way it

works is you tighten this knob down you

turn it you tighten it you turn it the

problem is the moment you start to crank

on it and cut it it looks like okay

we're going to cut yeah we're cutting

the problem is once you start to crank

it it's going to crack did you hear that

and this is how unfortunately

what it looks like acrylic is very very

similar to glass and it's like a plastic

glass if you won't fact acrylics not

even technically a glass or a plastic

it's more like a glass so anyway that's

why we don't do that but PE TG anyway

I've got a piece of PPG right here

somewhere that's also acrylic I've got

so much cylindrical stuff hanging out in

here don't ask why anyway this is PE TG

and one of the ways that you can tell

the difference is by looking at it from

the side PT G has a slight bluish tinge

to it where kerlick is going to look

very clear like glass but I like to use

this because it makes cutting a lot

simpler you can mark it with like a pin

or I like to put a scratch where I want

it where I want to cut and then just use

this to cut it and then to clean up the

inside I just use a step bit because one

of these steps is perfect for the

diameter of the tube just turn it by

hand like that and it will just shave

the PE TG very simple part of the

problems with PT G though versus acrylic

is it's very soft

and the problem is if you try and get

one of those those outer tools that a

monsoon actually sells when work will

cut the inside and the outside by just

kind of turning it the problem is that

chatters and the blade will skip and

jump you don't get a very clean cut so

that's why I like to use these two tools

this is a very clean outer bend this is

a very clean outer cut this is a very

clean intercut and that's what you want

other thing you're going to need

obviously a heat gun this is a very

cheap Wagner I would recommend spending

a couple of extra bucks and getting the

one that has the big base so that it

will sit on your desk and not flop and

move around on you and it's weighted

that would be actually a lot easier but

really this is just a hairdryer on

freaking steroids that's all it is and

it gets really hot well well in fact

right now we'll show you how the methods

for bending how to know when the

temperature is right for bending and

then what happens when you overheat it

or under heat it because that's the most

common problem I see is people bend too

soon it's not hot enough when they Bend

and they get flat spots and that looks

terrible the flipside is when it gets

too hot then it bubbles and blisters and

that's obviously terrible too

so let's go ahead hook this stuff up and

then I'll show you a little bit

do some of the bending and then what

we'll do here is we'll kind of do a sort

of a build montage you guys know I like

to do of upgrading coconut monkeys PC

because I kind of want this to be a

twofer make his PC look better and show

you guys how to do it in the mean time

so let's get started all right so I just

set my gun up like this this one's kind

of tippy be careful this end gets very

very hot as you can see things have

melted to it including some of the skin

from my thumb you guys don't want that

very very hot things are hot but anyway

there are most heat guns have two speeds

some of the higher-end ones have three

actually temperature so you got a medium

and a high let's go ahead and do this

actually let me take a piece of the

acrylic break that off right here and

I'm gonna show you guys what it looks

you see how easy I just broke that off I

mean literally that's this is one of the

reasons why we don't use acrylic that

much anymore in the modding world once

it once it gets any sort of a crack or a

stress fracture a leak is kind of scary

I'm going to show you what it looks like

when it starts to melt I'm gonna put

this on a medium heat if I go high where

this turns red-hot it's guaranteed to to

pretty much go from perfect temperature

to overheated instantly sometimes if I

want to get things going I'll put it on

high to get it kind of warmed up quickly

and then I'll move it down to medium

that way we don't get too hot too

quickly but let me go ahead and show you

what it looks like if you try and bend

it without an insert inserts are

absolutely necessary that you have to

have it if you don't have it then things

are going to fail let me show you what

it looks like if you try and do it

without an insert

okay so the temperature is pretty much

right for bending if I had an insert in

there but if I try and bend it without

anything in there

you see what happens it's very much like

what happens to a garden hose if you

don't have water in it you guys know if

you bend a garden hose without the water

on what happens the hose this collapses

but the one with the water is on the

hose can't collapse because it the the

space is filled this is also how men

Durrell bent pipes for exhausts and

things like that happen so as you can

see this piece would now be ruined

there's no there's no salvaging that

we're going to move on to another piece

here let me show you what happens if

when the temperature isn't right because

that's also a very common thing that

we've seen before so I'm going to go

ahead and do a bend here

towards the end where it's not hot

enough and we're going to show you what

that looks like so because one of the

most common things I get is Jay this is

happening I don't know why so if you can

see that the result of a certain

imperfection when it comes to

temperature and you can say oh okay that

happened to my my bend because it was

too cold or too hot that's going to be

the most useful thing you're going to

get today because I'm not going to be

able to show you how to properly measure

or how to determine where to do your

bends because I'll be honest I don't

measure at all everything I do is by

eyeball and I'm usually right the first

time it's more or less like an art I

mean how does an artist paint their

picture and just get it right because I

just do and I know that's not exactly I

just do so therefore you should do

that's like the worst tutorial in

history so that's why I'm trying to show

you some of the techniques and then

maybe you can develop you know your own

just do it

Nike mentality when it comes to this

anyway I own I key like $18,000 now or

something like that one thing to that's

really important is you'll notice here

that I'm always rotating it we don't

want to get it too hot so I'm always

rotating it and I'm moving back and

forth because a common issue people do

too is they only heat one spot but the

thing is for the bend radius to be nice

and smooth and even you've got to have

all the area along it also at the right


otherwise you'll have variants in there

where some of it cannot bend some of it

can the outer portion of the radius has

to be usually the hottest portion other

because it's got the most stretch

involved where the inside is going to be

kind of

crushing on itself so once I start to do

my bend - I'll heat up the outer radius

more than the inside what I'm also doing

- is I'm kind of letting the weights of

the tube I don't want that to fall in my

lap I want kids maybe another kid anyway

I don't I want that the weight of the

silicone insert and the tube to just

kind of be dangling on it that way I can

tell when it's starting to become soft

enough to bend because I think if you've

ever tried this before you start to ask

yourself like is it hot enough I can't

tell and they start trying to wiggle it

then you're Bend radius might be off in

the wrong spot just lots of things that

can go wrong but you can see now it is

starting to bend a little bit right here

see that just a little bit not much I

know if the camera can get that but it's

starting to bend right there I'm gonna

keep rotating rotating rotating if I

want to get a little bit more intense

heat I can move it closer move it

farther away I'd rather use the distance

I am to the nozzle of the heat gun to

control my temperature rather than

turning the gun hotter that's usually

not the way we want to do things here a

few moments later okay so as you can see

here it's starting to become malleable

now and sometimes I've seen some folks

go okay this is the right time to start

bending and then they just start to bend

well do you see what happened right

there that kink that you're seeing right

there is a result of two things one it's

a result of being a very tight radius at

too cold of a temperature and then

moving it too fast so this happens more

so with acrylic than ptg but ptg does it

as well where we were too cold and we

tried to bend and that's what happened

the other thing that would happen too is

right here you would probably get a

smooth radius and then a flat spot on

either end because again it would crush

this is obviously a piece of trash now

this is I think a lot of people sent me

pictures of this asking why did it do

that what happened what happens when

it's too hot well let me show you

acrylic acrylic is probably the most

dramatic result when it comes to being

too hot because it blisters up pretty

bad let me going to show you that we're

going to put this one on red hot to show

you guys because I think a lot of people

they're in pace

they just want to start doing their

bends they want to get it done and they

really start to to force their their

pipe a little bit to hardship you know

what I'm saying there you can take that

however you want but anyway this is what

too hot looks like all right so you're

looking at this and you're going okay

it's very flexible yeah my radius is

fairly smooth I make a little bit of a

flat spot right there but that's because

I didn't heat it that much it's still

very malleable so you're sitting here

letting it cool you know blowing on it

don't also don't dip it in water if you

dip this in water it will it will just

spider crack every word so you want to

sit here and hold it in the position you

want it to be in while you're letting it

cool you can't blow on it a little bit

blow on your pipe as you do you can see

it starts to get as it cools it gets

more more stiff and rigid trying to burn

your lips it sounds like a terrible

tutorial about something else new you go

okay yes I've got my bend and you're

like I can't get my tube out sometimes

you and I might to put little bit of

water in there you twist it as you twist

and pull and then you go oh man and

that's what you get you get these wort

looking things on there that's an

example of overheated acrylic now you

get the same thing with ptg the

difference is the ptg bubbles are bigger

they're much more bigger to get more

wavy rather than just being a straight

up blister like that but also that not

only do you create these blisters you

also weak in that spot where it can just

snap right off now it may look like I

actually pulled really hard on that I

really didn't but you notice it broke

right where the blisters are you see

that so you create a weak spot to when

you overheat it you create extra

brittleness so let's say this is a good

piece right here and something else you

may have noticed is as it was bending I

was flipping it like this and then I was

doing the inner radius and I was doing

the outer radius and I was kind of doing

that because as it's starting to bend

I'm just kind of

slowly work in that angle so I get the

radius that I want you notice I'm not

using a bending aid where some guys will

take like a tube and they'll Bend on the

tube it can collapse on itself and

create a perfect 90 or 45 or whatever

angle you want without having to worry

about you know going against something

that sometimes you see people say use a

toilet paper roll and or something round

like a pole or a desk leg I don't do any

of that this is just the way I do it

just freehand freeform like this but as

you're starting to get the bend you're

going to want to start working the

inside of the radius the outer radius

more than the inside like I said because

that's where it's stretching the most

and then eventually you can get a very

clean 90 degree angle that's pretty much

it that is all I do when I do my hard

line tubing so let's go and do this now

let's get this system drained and then

let's make this thing look a lot better

than it does now transition



whatever things in it looks a hell of a

lot better than it did before obviously

with all of that stained tubing having a

piece of that to me right there this

this tubing was clear when the when the

build was done member we did this back

in June of 2014 so it's been a year and

a half and this is what happened but not

only did the tubing you know leach a

little bit of plasticizer this color is

coming from the fact that the Aqua our

alpha cool radiator was not flushed

which is entirely my bad normally you

would take vinegar or some sort of like

a system prep and then you would clean

the system with a with an acid of some

sort and you wouldn't get this stuff in

fact all of that crud is sitting here in

this bowl and you'll see that up close

this is what's in radiators most of the

time unless it's a you know brand that

tends to clean their radiators before

shipping alpha cool does not so make

sure you clean your radiators but

bending the tubes and stuff is really

not that big of a deal

what you it it's like anything else the

more you practice easier it gets this is

the only Bend that we did that we ended

up not using everything else was the

first time attempt but that's because

I've been doing this now for so long

that it's pretty easy but anyway that's

pretty much it just make sure you keep

an eye on your temperatures don't try

and bend it when it's too cool keep an

eye on it before it gets hot it can not

only modulate the temperature of by

turning your heat gun either on medium

low or high but you can also vary the

temperature by how far away from the gun

that you are and make sure you heat up

the sides of where you're going to bend

to otherwise you get flat spots or it

will just it'll start to be a nice

smooth radius and then it will just kind

of sharpen out really bad and it look

terrible if it's not you know heat if

heats not evenly applied all the way

around where the radius is going to be

but other than that I hope this videos

helped you guys like I said I know it's

not the best tutorial with hardline

tubing but down in the comments once you

guys tell us about your builds if you

follow me on Twitter send me some

pictures of your hard line tubing builds

and if you guys are using soft tubing

and you want to avoid looking like this

in the future then definitely make sure

to kind of give hard line tubing a try

it's not it's easy it's just cutting the

tube and plugging it in you know and

then clamping it down as soft tubing is

but the end result definitely

a whole lot better anyway time to get

out of here guys thanks for watching

today's video a little bit longer than

usual but that's okay I want you guys to

learn something follow on social medias

and all that stuff and don't forget

check out Linda console and you guys can

learn how to do really cool stuff and

maybe even this in the future anyway

time to get out of here

see you in the next one