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  #1  
Old 01-21-2018, 05:03 PM
bobnoffs bobnoffs is offline
 
Join Date: Jul 2012
Location: n. wi
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Default fuel vent routing
i am planning out my vent line and my intended route will take it a couple inches below where it attaches to the tank. it will run like that for 15'' and then go to top of cabin, 15'' above tank and at that point attach to antisiphon line and then head to the belly where it will exit. i am familiar with anti siphon, siphoning etc. is there a reason not to allow the vent line below its attach point to the tank? i am sure the low portion of the line will at times have fuel but i don't see any problem. opinions?
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  #2  
Old 01-21-2018, 05:39 PM
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DonFromTX DonFromTX is offline
 
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Location: La Feria Texas
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I would be nervous of having a spot that can trap liquid. Condensation could be frozen there and stop the vent.
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  #3  
Old 01-22-2018, 08:05 AM
bobnoffs bobnoffs is offline
 
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hey don,
good call. i will definitely route my vent line to avoid any low sports. glad i asked.
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n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12. in the hangar now as of 10/15/19
RV-12 kit as of 9/13
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  #4  
Old 01-22-2018, 08:25 AM
219PB 219PB is offline
 
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Location: Victoria, Tx
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I know that there has been a lot of discussion around this topic on this forum. How do we explain Van's stock fuel vent routing? Major loop seal.
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  #5  
Old 01-22-2018, 05:30 PM
bobnoffs bobnoffs is offline
 
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Location: n. wi
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i too would be interested in any thoughts about this
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n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12. in the hangar now as of 10/15/19
RV-12 kit as of 9/13
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  #6  
Old 01-23-2018, 08:56 AM
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Raymo Raymo is offline
 
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I did the Rocket style vents in the wing root. Much easier than the plans routing and it works great.
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