Fuel & Vent Line Replacement - Hose Sizes and Total Lengths?

[james wack]

I suspect this has been asked and answered multiple times, but now that I'm ready to order new fuel hose, cannot find the right thread(s). Tanks are
down, sending units cleaned and tested, new tank top seals and fill port connectors in hand (thank you Applied GMC). Just need new soft lines sizes
and total lengths to get them on order this morning.

In my review of prior forum threads, I saw several recommendations to use USCG A1-15 barrier lined hose. Now that I've considered it, seems like a
no-brainer. Is it?

In case anyone is wondering - I elected to re-use the original sending units and tank-selector configuration. PO installed an in-line pump just
forward of the tank selector valve and activated by an Aux fuel pump switch at the dash. Strainer socks were removed previously in favor of in-line
filter outside the tanks. This arrangement has given me zero issues so, if it ain't broke...

--
Wackster - 1976 23' Crestmont
Baltimore, Maryland

 

[LQQKatJon]

I put this on my blog a while ago. I think it is still relevant:

https://lqqkatjon.blogspot.com/search?q=fuel+lines

Gates "Barricade" hose is the stuff to use: SAE 30R14

--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/

 

[james wack]

Goodness - that was quick and covers the topic soup to nuts. Thank you.
--
Wackster - 1976 23' Crestmont
Baltimore, Maryland

 

[RF_Burns]

Some of us have replaced the rubber hoses on top of the fuel tanks with metal lines in the hope that we will not have to take them down again.

http://www.gmcmhphotos.com/photos/g7006-fuel-tank-lines.html

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

 

[jim kanomata1]

Keep in mind ALL rubber in the fuel system must be replaced, including the
fuel pump and selector switch and sometimes the vapor separator
Also seriously consider using an aux. fuel pump with switch as there is
great chances for vapor loc at warmer temperature.
Do it now, than doing it later.

On Fri, Sep 27, 2019 at 7:53 AM Bruce Hislop via Gmclist <

> Some of us have replaced the rubber hoses on top of the fuel tanks with
> metal lines in the hope that we will not have to take them down again.
>
> http://www.gmcmhphotos.com/photos/g7006-fuel-tank-lines.html
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[powwerjon]

James,
Here is an album of the rebuild of the fuel tanks on our stretch coach which has 3 fuel tanks, the front 2 tied together to as a one 50 gal main tank and the reserve tank 25 gals in the rear position. Exact backwards of the factory installation.

http://www.gmcmhphotos.com/photos/g6928-fuel-tank-system-rebuild.html

J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan, Midland

 

[dan molnes]

Don't use 3/8" for the tank vent lines on top like my P.O. Did ,you'll shut down a Costco gas station real fast even with clamps tight. 5/16 only

Sent from my iPad

>
> James,
> Here is an album of the rebuild of the fuel tanks on our stretch coach which has 3 fuel tanks, the front 2 tied together to as a one 50 gal main tank and the reserve tank 25 gals in the rear position. Exact backwards of the factory installation.
>
> http://www.gmcmhphotos.com/photos/g6928-fuel-tank-system-rebuild.html
>
> J.R. Wright
> GMC Great Laker MHC
> GMCGL Tech Editor
> GMC Eastern States Charter Member
> GMCMI
> 78 GMC Buskirk 29.5’ Stretch
> 75 GMC Avion (Under Reconstruction)
> Michigan, Midland
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Larry Davick]

I understand that Poly-Armour brake line is very malleable and available at Napa and elsewhere. It's a coated composite steel and copper line I
think.
--
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy