Fuel Lines: What type to use? - Zenith Aircraft Builders and Flyers2024-03-29T15:14:24Zhttps://zenith.aero/forum/topics/fuel-lines-what-type-to-use?feed=yes&xn_auth=noThe conductive carbon coating…tag:zenith.aero,2021-09-12:2606393:Comment:8469862021-09-12T09:57:54.074ZGeoff Klestadthttps://zenith.aero/profile/GeoffKlestadt
<p>The conductive carbon coating is needed because static sparks will be generated and they cause pinhole failures in the teflon tube.</p>
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<p>‘’I started with Earls stainless and teflon. It’s bullet proof but heavy and hard to work with. I then found “Goodridge” stainless and teflon racing hose which is much more flexible, lighter and easier to use. You have to be careful not to over tighten the end fittings or the nut will crack. I got all of it from Pegasus racing. (Goodridge g line…</p>
<p>The conductive carbon coating is needed because static sparks will be generated and they cause pinhole failures in the teflon tube.</p>
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<p>‘’I started with Earls stainless and teflon. It’s bullet proof but heavy and hard to work with. I then found “Goodridge” stainless and teflon racing hose which is much more flexible, lighter and easier to use. You have to be careful not to over tighten the end fittings or the nut will crack. I got all of it from Pegasus racing. (Goodridge g line xf 811 hose and fittings)</p>
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<p>If I was building again, I’d use aluminium tubing as much as possible along with the Goodridge hose for flexible sections.</p> In the fuel lines you referen…tag:zenith.aero,2021-09-07:2606393:Comment:8462952021-09-07T17:49:56.417ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>In the fuel lines you reference, there is no mention that they are carbon impregnated/electrically conductive. In the picture on the website, the PTFE liner appears to be white, which means they are probably not conductive (conductive lines usually have a gray or black liner). If the liner is conductive, it reduces the possibility of a static build-up and a spark. This is one area where you want the best quality available - period!</p>
<p>I'd recommend using braided stainless steel lines -…</p>
<p>In the fuel lines you reference, there is no mention that they are carbon impregnated/electrically conductive. In the picture on the website, the PTFE liner appears to be white, which means they are probably not conductive (conductive lines usually have a gray or black liner). If the liner is conductive, it reduces the possibility of a static build-up and a spark. This is one area where you want the best quality available - period!</p>
<p>I'd recommend using braided stainless steel lines - almost indestructible and permanent. If you're going to fabricate them yourself (I did!), get some quality lines and fittings such as Earl's "Speed-</p>
<p>flex" at <a href="https://www.anplumbing.com/" target="_blank" rel="noopener">ANPlumbing.com</a> or you can have them made-to-order by various vendors such as <a href="https://aircraftspecialty.com/" target="_blank" rel="noopener">Aircraft Specialty</a>.</p>
<p>John</p>
<p>N750A</p> Old thread but I can't decide…tag:zenith.aero,2021-09-07:2606393:Comment:8464662021-09-07T14:46:11.831ZJorge Fernandezhttps://zenith.aero/profile/JORGEFERNANDEZ
<p>Old thread but I can't decide between stainless steel or nylon braided PTFE fuel lines. Any opinions?</p>
<p>I was looking at these.</p>
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<p><a href="https://hotrodfuelhose.com/products/an6-ptfe-lined-nylon-braided-hose?variant=49894217415" target="_blank">https://hotrodfuelhose.com/products/an6-ptfe-lined-nylon-braided-hose?variant=49894217415</a></p>
<p>Old thread but I can't decide between stainless steel or nylon braided PTFE fuel lines. Any opinions?</p>
<p>I was looking at these.</p>
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<p><a href="https://hotrodfuelhose.com/products/an6-ptfe-lined-nylon-braided-hose?variant=49894217415" target="_blank">https://hotrodfuelhose.com/products/an6-ptfe-lined-nylon-braided-hose?variant=49894217415</a></p> Hi Jonathan,
I know this pos…tag:zenith.aero,2016-03-31:2606393:Comment:4985632016-03-31T02:25:19.687ZJason Camillerihttps://zenith.aero/profile/JasonCamilleri
<p>Hi Jonathan,</p>
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<p>I know this post is very old now, but did you ever get an answer on the fuel hose being 6mm id from the gascolator to the mechanical pump? </p>
<p>I have 6mm id from the gascolator to the mechanical pump and it works fine also. The hose is a bit hard to push over the mechanical pump barb, but it does go on and engine works fine.</p>
<p>What size do you have from the gascolator to the mechanical pump?</p>
<p>Hi Jonathan,</p>
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<p>I know this post is very old now, but did you ever get an answer on the fuel hose being 6mm id from the gascolator to the mechanical pump? </p>
<p>I have 6mm id from the gascolator to the mechanical pump and it works fine also. The hose is a bit hard to push over the mechanical pump barb, but it does go on and engine works fine.</p>
<p>What size do you have from the gascolator to the mechanical pump?</p> correction, should be AN816-4…tag:zenith.aero,2010-09-02:2606393:Comment:703522010-09-02T03:42:45.842ZRobert E Pickenshttps://zenith.aero/xn/detail/u_0qgzwqu4g7edn
correction, should be AN816-4-4D. Bob P.
correction, should be AN816-4-4D. Bob P. Dale, I think you would need…tag:zenith.aero,2010-09-01:2606393:Comment:703272010-09-01T22:39:29.563ZRobert E Pickenshttps://zenith.aero/xn/detail/u_0qgzwqu4g7edn
Dale, I think you would need to use an "AN816-4D" nipple which is a 1/4" NPT pipe thread on one end and a 1/4", 37 degree flared tubing on the other. Bob Pickens, Troy Mo.
Dale, I think you would need to use an "AN816-4D" nipple which is a 1/4" NPT pipe thread on one end and a 1/4", 37 degree flared tubing on the other. Bob Pickens, Troy Mo. That's what I thought I bough…tag:zenith.aero,2010-09-01:2606393:Comment:703192010-09-01T20:32:33.064ZDale Medendorphttps://zenith.aero/profile/DaleMedendorp
That's what I thought I bought (1/4" NPT Pipe), but they don't fit. I guess I better look at this a little closer.<br />
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Thanks!
That's what I thought I bought (1/4" NPT Pipe), but they don't fit. I guess I better look at this a little closer.<br />
<br />
Thanks! Word search "AN Fittings" on…tag:zenith.aero,2010-09-01:2606393:Comment:702432010-09-01T12:03:30.019ZChris Aysenhttps://zenith.aero/profile/ChrisAysen
Word search "AN Fittings" on the Aircraft Spruce home page you will see a selection of fittings. The screen fitting in the tank is 1/4" pipe (was on mine anyway) so you would need either a 4-4 fitting or a 6 fitting (choice of steel or aluminum) depending on the OD of the tubing you are using. Don't forget a shut off valve some where close in that area. Also use fairly thick grommets to run the tubing through the root rib if you have to go through the rib. I ran everything through a lightening…
Word search "AN Fittings" on the Aircraft Spruce home page you will see a selection of fittings. The screen fitting in the tank is 1/4" pipe (was on mine anyway) so you would need either a 4-4 fitting or a 6 fitting (choice of steel or aluminum) depending on the OD of the tubing you are using. Don't forget a shut off valve some where close in that area. Also use fairly thick grommets to run the tubing through the root rib if you have to go through the rib. I ran everything through a lightening hole. If I want to use AN fittings…tag:zenith.aero,2010-09-01:2606393:Comment:702082010-09-01T01:37:32.667ZDale Medendorphttps://zenith.aero/profile/DaleMedendorp
If I want to use AN fittings and Aluminum tubing, what adapter do I use at the finger screen on the outlet of the fuel tank (in place of the barbed fitting)?
If I want to use AN fittings and Aluminum tubing, what adapter do I use at the finger screen on the outlet of the fuel tank (in place of the barbed fitting)? I had some fuel smell in the…tag:zenith.aero,2010-08-30:2606393:Comment:700602010-08-30T12:14:59.808ZChris Aysenhttps://zenith.aero/profile/ChrisAysen
I had some fuel smell in the cabin until I installed some Parker "Stratoflex" I highly recommend it. All in all rubber tubing or some kind of flexible tubing would probably work best on the 912 series of engines. Periodic replacement is always a must you can't escape it. Solid lines have also work in aircraft and will continue to be used in certified aircraft. However, using it requires a well layed out schematic plan with vibration considerations at all times. Solid lines are usually run in…
I had some fuel smell in the cabin until I installed some Parker "Stratoflex" I highly recommend it. All in all rubber tubing or some kind of flexible tubing would probably work best on the 912 series of engines. Periodic replacement is always a must you can't escape it. Solid lines have also work in aircraft and will continue to be used in certified aircraft. However, using it requires a well layed out schematic plan with vibration considerations at all times. Solid lines are usually run in solid lengthes up to connection points where flex hose is used to make the connection. A long solid run with a solid fitting splice in it is asking for trouble on a 912 series engine. I recommend flexible hose with firesleeve.