I have a 3 line tank...(vent, feed, fill) Just built a profile and only need 2 lines. (vent & feed) but, I have a 3rd.. (fill) dont need it... what is the best way to close off an unneeded line??? thank you thank you..

Try these on the 3rd line.

http://www3.towerhobbies.com/cgi-bin...?&P=9&I=LXK138

I have a remote fuel system ( has the "dot" ) thought about running a short tube and use just the dot to plug it.. was hoping a drop of CA into the end of the tube might do it. Not sure if the fuel will eat it or not ?... thanks for the link.. I can just order another to replace mine.

Someone said drop some solder in the end to seal it off?

Hi Panzerd18, how is things down south ? And no one mentioned solder but using ca which wont work either as the line is silicone and wont stick too good, but using a fuel dot will fix the problem .
Bill

Isn't there three pieces of alloy tube that pass through the clunk? Instead of attaching the silicon tube to the steel tube then plug the end I thought you could pull the silicon tube off and seal the alloy tube?

Nobody has mentioned epoxy, and for good reason.

If anyone considered any solution that uses epoxy, don't do it. Epoxy will break down if exposed continuously.

A very short bolt that fits the tubing works great. The size that would securely fit the inside diameter of the silicon tubing would be very light. And the threads insure a decent seal.

If I remember correctly, 4-40 works.

Anything that fits snugly into the tube.. it's rubber, after all, will work... within reason. Balsa, for instance would be a bad choice. If you feel as though it may come out, put a wire wrap around it to make sure it does not come off.

I would either solder the tubing shut, or replace it with a piece of 1/8" rod.

Solder it shut or put a short piece of fuel tubing on it, fold over the end and zip tie or twist tie it. I have done this before.

Hi!
Why not put that third line to the pressure nipple on the silencer so you have a Uni-flow tank!
This is the best tank set up using an ordinary R/C tank next to a Tettra "Bubbless" tank. Very few R/C modelers seems to know about this...!

Another option is replace the stopper.
http://www3.towerhobbies.com/cgi-bin...?&I=LXD756&P=7

good ideas all... I'll either solder the tube or just run the 1/8 rod.... thanks again everyone.. what a great forum...

I did neither.. here is my finished close off... it was the simplest and isn't in the way of anything....