Fuel tank "T fitting"

[Jim Herpst]

Getting ready to install the new fuel tank. Any one have or know what fitting to use at the rear of the rank for BOTH wing tank fuel lines that will feed the main tank to attach to? I assume a T fitting. For what it is worth my wing tank fuel valves are in the root of the wings (where that location any way will remain.) Also for what it is worth will have the larger fuel lines as installing an 0200

[3Dreaming]

What size will your lines be, and what size is the bung? You will probably want something like this, if the sizes are right.

https://www.aircraftspruce.com/catalog/hapages/an825.php

[Jim Herpst]

What size will your lines be, and what size is the bung? You will probably want something like this, if the sizes are right.
https://www.aircraftspruce.com/catal...ages/an825.php

Thank you . Not sure why but could not find any fittings like this when searching ASS. I will need to drag out the STC and get the line and subsequent fitting size. The bung is the standard tank size as produced...again will get that and tge reducer needed to get to the ultimate T fitting...again thanks!

[Ragwing nut]

Thank you . Not sure why but could not find any fittings like this when searching ASS. I will need to drag out the STC and get the line and subsequent fitting size. The bung is the standard tank size as produced...again will get that and tge reducer needed to get to the ultimate T fitting...again thanks!

you shouldn't need reducer. its 1/4" pipe.

[Jim Herpst]

you shouldn't need reducer. its 1/4" pipe.

Well the plug ( bolt with pipe thread) that goes into the bung technically is a reducer as it contains the 1/4 inch pipe thread hole ...fortunately the old tanks plug was the same size as the bung on the new one . I don't know why I am having such a time with finding these fittings... any how as Baker pointed out there was a pipe t fitting from ASS that works with a 1/4 pipe fitting at the T and the other two ends for modern fuel fittings...I did also find in the boxes of stored stuff find the original T fitting however it utilizes pipe thread type male ends on all three

[Jim Herpst]

Anyone used the new WAG Aero fuel tanks. The holes the rods fit through tge tank are 4 x the size. What did you use to fill the gap ?

[Ragwing nut]

Anyone used the new WAG Aero fuel tanks. The holes the rods fit through tge tank are 4 x the size. What did you use to fill the gap ?

4x bigger than rod or 4x original? factory used a steel sleeve that slid on the rod with a piece of rubber hose over it about 3" long at each end. to support the tank.

[Ragwing nut]

Well the plug ( bolt with pipe thread) that goes into the bung technically is a reducer as it contains the 1/4 inch pipe thread hole ...fortunately the old tanks plug was the same size as the bung on the new one . I don't know why I am having such a time with finding these fittings... any how as Baker pointed out there was a pipe t fitting from ASS that works with a 1/4 pipe fitting at the T and the other two ends for modern fuel fittings...I did also find in the boxes of stored stuff find the original T fitting however it utilizes pipe thread type male ends on all three

original lines and some valves used inverted flares. Commercial fittings. If you can find a parts store that still carries brass fitting assortments you can find new stuff.

[Jim Herpst]

original lines and some valves used inverted flares. Commercial fittings. If you can find a parts store that still carries brass fitting assortments you can find new stuff.

Mike,

The original lines that ran from the wing tanks were copper with all the brass fittings. Is that still legal ? It was certified that way..

[3Dreaming]

Mike,

The original lines that ran from the wing tanks were copper with all the brass fittings. Is that still legal ? It was certified that way..

Yes, it is still legal. The problem is newer mechanics have not dealt with lines and fittings like that and may not like it.

[Jim Herpst]

That is what I thought. I don't believe I have the original lines anyway...going to give it another look . I thought I remembered the last owner saying "got rid of..they were copper anyway" He was an A&P and as I am seeing going behind him he unfortunately knew little.

[woodmw]

Jim, I replaced my fuselage tank a few years ago with a new one from Wag. I was able to reuse fittings, lines, valves from wing tanks.
I would suggest:

If deemed legal by IA, use 3003-0 Versatube with AN fittings from Spruce. This tubing will have to be flared, so you will need access to the correct flaring tool.
AN fittings are sized by pipe thread, NPT, and/or tube size.

I replaced the rubber spacer hose with new from auto parts store. New was snug, so a little silicone grease helped.

My tank needed some modification to fit in place. Rubber mallet used to indent tank on each side for clearance. Original tank was so modified.

Most important!!! Pressure test before installing. I tested mine using a few lbs of air with water in tank. Tested good, held pressure over night. Installed in plane, hooked up fuel lines, added 2-3 gallons of fuel. Put paper under tank on floor. Next day, very small blue stains on paper. Pin hole in weld around bung for fuel outlet. Fuel must be smaller at the molecular level. Removed everything, TIG'd leak, reinstalled. Good for years, so far.

I would use 5052-O, with 37* flare

[Ragwing nut]

Mike,

The original lines that ran from the wing tanks were copper with all the brass fittings. Is that still legal ? It was certified that way..

still legal, even though no longer legal in automotive world for brake lines. If you want to make new you will have to have an inverted double flare tool. I use Nicopp instead of copper, it won't work harden and crack like copper. Just be careful bending tight radius', it doesn't like it.

[Jim Herpst]

Jim, I replaced my fuselage tank a few years ago with a new one from Wag. I was able to reuse fittings, lines, valves from wing tanks.
I would suggest:

If deemed legal by IA, use 3003-0 Versatube with AN fittings from Spruce. This tubing will have to be flared, so you will need access to the correct flaring tool.
AN fittings are sized by pipe thread, NPT, and/or tube size.

I replaced the rubber spacer hose with new from auto parts store. New was snug, so a little silicone grease helped.

My tank needed some modification to fit in place. Rubber mallet used to indent tank on each side for clearance. Original tank was so modified.

Most important!!! Pressure test before installing. I tested mine using a few lbs of air with water in tank. Tested good, held pressure over night. Installed in plane, hooked up fuel lines, added 2-3 gallons of fuel. Put paper under tank on floor. Next day, very small blue stains on paper. Pin hole in weld around bung for fuel outlet. Fuel must be smaller at the molecular level. Removed everything, TIG'd leak, reinstalled. Good for years, so far.

I rested the tank with water. Now will test with 100ll.

Versetube makes sence to me anyway. Hell it should be beter with the AN fittings than the copper was.

Yes going to use hose from auto supply to mount it.....

Thanks!

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Don't forget to install vent into header tank for the larger engine STC.