Home » Public Forums » GMCnet » 1/2" tank vent steel tube source needed.
| 1/2" tank vent steel tube source needed. [message #167673] |
Thu, 26 April 2012 21:15  |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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I need to find a source for the 1/2" steel tubing used as the tank fill vent line between the tanks and the front of the frame. This tube is similar to the standard 3/8" steel fuel line.
I do not want to deal with coiled tube. I'm looking for straight sections. I've called around asking for 1/2" fuel line tubing but none of the auto parts stores around me carry it straight or coiled any larger than 3/8". I have checked with local heavy truck repair facilities and they do not have it. One hydraulic vendor did not have any with the zinc coating but did have something called JIC tube available in 1/2". I'm not sure what that is. I know the JIC fittings are 37* and that tube should be rated on the OD.
Is this stuff that hard to find or am I not asking for the right product or calling the right places?
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167687 is a reply to message #167682] |
Thu, 26 April 2012 22:14  |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| Robert Mueller wrote on Thu, 26 April 2012 21:50 |
Steve,
Could you please go to the Parts Book 78Z page 12-2 and advise just which
tube you're looking for.
BTW when I was building ground support equipment for Project Apollo if I
needed a really straight piece of long tubing I'd clamp one end to something
solid and the other end to a come along and then "stretch" the tubing and it
came out straight.
Thanks,
Rob
|
Part ID #32 on page 12-2
A friend said he had some 1/2" aluminum tube, coil that I could use. I suspect your stretch straighting would work on that. Is AL tube suitable for use in a fuel system, especially with ethanol?
BTW the run from that tube (#32) up to the fuel filler, on my '74, is 1/2" rubber hose. It had a "factory installed" kink that reduced the effective diameter by more than half. I will be bending up a tube section to replace that rubber hose section.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: 1/2" tank vent steel tube source needed. [message #167693 is a reply to message #167673] |
Thu, 26 April 2012 22:43 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
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Senior Member |
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Steve,
Check McMaster-Carr site and look for DOM tubing, it's available in .035 and .049 wall thickness. The .035 is plenty thick for what you want.
Stock # 9220K91 for 3ft $ 7.75
# 9220K35 for 6ft $ 11.92
Using the first step of a double flair tool can create the lip to retain the hose.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167701 is a reply to message #167687] |
Thu, 26 April 2012 23:09 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Steve,
OK, I interpret the manual to mean that the vent lines are 3/8" ID rubber
from the tank fuel level sender to the solid tubes #40 and the "T" #38.
IIRC on Double Trouble these lines were rubber.
Somewhere in the back of my mind I seem to remember someone suggesting that
the tank vents be separated into two tubes and reconnected as close to the
filler vent as possible. It sped up filling the tanks and reduced the
burping.
Is this the vent they were talking about and is memory working well?
Regards,
Rob M.
-----Original Message-----
From: Steve Southworth
Part ID #32 on page 12-2
A friend said he had some 1/2" aluminum tube, coil that I could use. I
suspect your stretch straighting would work on that. Is AL tube suitable
for use in a fuel system, especially with ethanol?
BTW the run from that tube (#32) up to the fuel filler, on my '74, is 1/2"
rubber hose. It had a "factory installed" kink that reduced the effective
diameter by more than half. I will be bending up a tube section to replace
that rubber hose section.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167716 is a reply to message #167701] |
Fri, 27 April 2012 01:58 |
Chuck Garton
Messages: 54
Registered: June 2006
Karma: 0
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Member |
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Both my coaches (73 & 77) came with the 1/2" vent tube. It had 3/8"
hose fittings for the rear tank and forward tank and a 1/2" fitting in
front. I am the one that replaced the rubber tubing with 3/8" steel
tubing and kept the vent lines separate all the way to the top of the
left front fender well. NAPA sells 3/8" steel tubing in 25' rolls. As
Rob said this really sped up the refueling process. To see what I did
to my fuel system go to www.gmcpc.org and click on shadetree and third
fuel tank installation.
Chuck Garton
77 Kingslet 455
Ridgecrest, CA
On Thu, Apr 26, 2012 at 9:09 PM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Steve,
>
> OK, I interpret the manual to mean that the vent lines are 3/8" ID rubber
> from the tank fuel level sender to the solid tubes #40 and the "T" #38.
>
> IIRC on Double Trouble these lines were rubber.
>
> Somewhere in the back of my mind I seem to remember someone suggesting that
> the tank vents be separated into two tubes and reconnected as close to the
> filler vent as possible. It sped up filling the tanks and reduced the
> burping.
>
> Is this the vent they were talking about and is memory working well?
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Steve Southworth
>
> Part ID #32 on page 12-2
>
> A friend said he had some 1/2" aluminum tube, coil that I could use. I
> suspect your stretch straighting would work on that. Is AL tube suitable
> for use in a fuel system, especially with ethanol?
>
> BTW the run from that tube (#32) up to the fuel filler, on my '74, is 1/2"
> rubber hose. It had a "factory installed" kink that reduced the effective
> diameter by more than half. I will be bending up a tube section to replace
> that rubber hose section.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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> _______________________________________________
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167720 is a reply to message #167673] |
Fri, 27 April 2012 07:02 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Steve,
My vent system on the stretch is made out of type L copper tubing that
has soldered together using copper fittings. You can get it at any
big box store.
http://www.lowes.com/pd_23817-27953-3/8+L+60_0__?productId=3133029&Ntt=copper+pipe&pl=1¤tURL=%2Fpl__0__s%3FNtt%3Dcopper%2Bpipe&f acetInfo=
or
http://tinyurl.com/7uo8jmo
You could jump up to 3/4" if you wanted a bigger line.
If you think that you need to add protection for the copper tubing
just use undercoating spray on it.
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCMHI
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan
On Apr 26, 2012, at 10:15 PM, Steve Southworth wrote:
>
>
> I need to find a source for the 1/2" steel tubing used as the tank
> fill vent line between the tanks and the front of the frame. This
> tube is similar to the standard 3/8" steel fuel line.
>
> I do not want to deal with coiled tube. I'm looking for straight
> sections. I've called around asking for 1/2" fuel line tubing but
> none of the auto parts stores around me carry it straight or coiled
> any larger than 3/8". I have checked with local heavy truck repair
> facilities and they do not have it. One hydraulic vendor did not
> have any with the zinc coating but did have something called JIC
> tube available in 1/2". I'm not sure what that is. I know the JIC
> fittings are 37* and that tube should be rated on the OD.
>
> Is this stuff that hard to find or am I not asking for the right
> product or calling the right places?
>
>
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167728 is a reply to message #167701] |
Fri, 27 April 2012 08:11 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| Robert Mueller wrote on Thu, 26 April 2012 23:09 |
Steve,
OK, I interpret the manual to mean that the vent lines are 3/8" ID rubber
from the tank fuel level sender to the solid tubes #40 and the "T" #38.
IIRC on Double Trouble these lines were rubber.
Regards,
Rob M.
|
Correct.
I gave thought to the double 3/8" lines but prefer to go the original way. I think, that if done correctly, I.E. no kinks or other restrictions, it will work properly.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: 1/2" tank vent steel tube source needed. [message #167773 is a reply to message #167673] |
Fri, 27 April 2012 13:55 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
|
Senior Member |
|
|
| midlf wrote on Thu, 26 April 2012 21:15 |
I need to find a source for the 1/2" steel tubing used as the tank fill vent line between the tanks and the front of the frame. This tube is similar to the standard 3/8" steel fuel line.
Is this stuff that hard to find or am I not asking for the right product or calling the right places?
|
Well duh - I solved the problem. I was poking around this AM on the design for the new fuel system and found my original drawings that I had forgotten about. (no comments needed, I already know what that means.) The new fuel venting system needs separate lines up to just below the filler and 3/8" lines will work just fine. Thanks for the input.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167790 is a reply to message #167718] |
Fri, 27 April 2012 16:43 |
Chuck Garton
Messages: 54
Registered: June 2006
Karma: 0
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Member |
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Rob,
Most of the time, I can use the high setting. I understand when the
gas station puts new filters in the lines, one gets a faster flow,
dirty filters flow is slower.
I have experienced no need to stop and burp.
I do get a splash out of the filler if I let get full at the high
setting. I usually calculate how much gas it take to get 10 MPG and
when that number comes up, I go to the slow setting. This avoids
splash back. My 13,500 lb coach gets a steady 8 MPG.
Chuck
On Fri, Apr 27, 2012 at 1:54 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Chuck,
>
> Thanks for commenting and proving that my memory is not as bad as I think it
> is and I'm not getting senile - YET! ;-)
>
> I would appreciate some more details about when you refuel.
>
> 1) Can you set the fuel filler nozzle at the highest position and the tanks
> fill without it shutting off?
>
> 2) Do you have to stop to let the tanks burp?
>
> 3) When you get close to full is there any spray back out of the fuel filler
> on the GMC?
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Chuck Garton
>
> Both my coaches (73 & 77) came with the 1/2" vent tube. It had 3/8"
> hose fittings for the rear tank and forward tank and a 1/2" fitting in
> front. I am the one that replaced the rubber tubing with 3/8" steel
> tubing and kept the vent lines separate all the way to the top of the
> left front fender well. NAPA sells 3/8" steel tubing in 25' rolls. As
> Rob said this really sped up the refueling process. To see what I did
> to my fuel system go to www.gmcpc.org and click on shadetree and third
> fuel tank installation.
>
> Chuck Garton
> 77 Kingslet 455
> Ridgecrest, CA
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167792 is a reply to message #167790] |
Fri, 27 April 2012 17:24 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Chuck,
THANKS! Since you have three 3/8" vent lines dumping into the 1/2" vent line
without any problems it is safe to assume that two will work fine too!
Regards,
Rob M.
-----Original Message-----
From: Chuck Garton
Rob,
Most of the time, I can use the high setting. I understand when the
gas station puts new filters in the lines, one gets a faster flow,
dirty filters flow is slower.
I have experienced no need to stop and burp.
I do get a splash out of the filler if I let get full at the high
setting. I usually calculate how much gas it take to get 10 MPG and
when that number comes up, I go to the slow setting. This avoids
splash back. My 13,500 lb coach gets a steady 8 MPG.
Chuck
On Fri, Apr 27, 2012 at 1:54 AM, Rob Mueller <robmueller@iinet.net.au>
wrote:
> Chuck,
>
> Thanks for commenting and proving that my memory is not as bad as I think
it
> is and I'm not getting senile - YET! ;-)
>
> I would appreciate some more details about when you refuel.
>
> 1) Can you set the fuel filler nozzle at the highest position and the
tanks
> fill without it shutting off?
>
> 2) Do you have to stop to let the tanks burp?
>
> 3) When you get close to full is there any spray back out of the fuel
filler
> on the GMC?
>
> Regards,
> Rob M.
>
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GMCnet mailing list
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] 1/2" tank vent steel tube source needed. [message #167851 is a reply to message #167792] |
Sat, 28 April 2012 01:07 |
Chuck Garton
Messages: 54
Registered: June 2006
Karma: 0
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Member |
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Yes. Mine was set up that way before the third tank went in.
Chuck
On Fri, Apr 27, 2012 at 3:24 PM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Chuck,
>
> THANKS! Since you have three 3/8" vent lines dumping into the 1/2" vent line
> without any problems it is safe to assume that two will work fine too!
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Chuck Garton
>
> Rob,
>
> Most of the time, I can use the high setting. I understand when the
> gas station puts new filters in the lines, one gets a faster flow,
> dirty filters flow is slower.
>
> I have experienced no need to stop and burp.
>
> I do get a splash out of the filler if I let get full at the high
> setting. I usually calculate how much gas it take to get 10 MPG and
> when that number comes up, I go to the slow setting. This avoids
> splash back. My 13,500 lb coach gets a steady 8 MPG.
>
> Chuck
>
> On Fri, Apr 27, 2012 at 1:54 AM, Rob Mueller <robmueller@iinet.net.au>
> wrote:
>> Chuck,
>>
>> Thanks for commenting and proving that my memory is not as bad as I think
> it
>> is and I'm not getting senile - YET! ;-)
>>
>> I would appreciate some more details about when you refuel.
>>
>> 1) Can you set the fuel filler nozzle at the highest position and the
> tanks
>> fill without it shutting off?
>>
>> 2) Do you have to stop to let the tanks burp?
>>
>> 3) When you get close to full is there any spray back out of the fuel
> filler
>> on the GMC?
>>
>> Regards,
>> Rob M.
>>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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