OK Guys, I have a three line fuel tank from VV. Vent and fill line on top carb line in cap. I am using a Dubro fuler. Can I put a T fitting in the fuel line going to the Dubro fuler then one line to the fill fitting on the tank? Will the carb still draw fuel ? I don't have any experience with Dubro Fulers.

If its the Dubro Fueler i think it is, This one will go between the Carb and the fuel tank clunk line.

I would recommend to not use that type on a Gas engine , Assuming its gas,

But in the Glo days thats what we would use and worked ok.

The Down site to this type of unit is that if it does not seal or get worn it will leak air into the carb line and cause a whole bunch of issues.

I would use the 3 lines system, So clunk to carb (With a filtered clunk or inline filter) and then one vent out the fuse and Then the fill line done with a Dot style cap or filler port.

See this video for a visual explanation

Fuel System Setup (7 min 33 sec)

Yeah that's what I was thinking but I got the Dubro fuler with the plane so I thought I would use it. Think I will just order a fuel dot and be done with it. A little research I didn't find to much good about the fuler. Thanks for your help.

yeah that type of Fueler idea was great in Theory and while new, But In practice not a Brilliant setup

Fuel dot works great and is a solid setup with a 3 line tank.

If you plan to drain that tank, you'll need access to the clunk line. I install a T in the clunk/carb line, and then the fuel dot is ran from there to side of plane.

That way I can fill, or drain from that dot... and yes ... you can't beat a good fuel dot... a nice aluminum machined dot is bullet proof.... and leak proof.

If you put a fill line in the top of the tank, you won't be able to drain it. I may be reading your post wrong... but I see you're using a 3 line system.... which isn't needed.

A simple 2 line tank, with a T fitting somewhere on the clunk-to-carb line, with fuel dot on side of plane to fill/drain, and the vent line routed over the top of the tank and down.... very simple and very effective. I do this exactly as done in the above video.

Maybe I'm not understanding, but why a 3 line tank?... is there a reason I'm not seeing?..

Originally Posted by DGrant

If you plan to drain that tank, you'll need access to the clunk line. I install a T in the clunk/carb line, and then the fuel dot is ran from there to side of plane.

That way I can fill, or drain from that dot... and yes ... you can't beat a good fuel dot... a nice aluminum machined dot is bullet proof.... and leak proof.

If you put a fill line in the top of the tank, you won't be able to drain it. I may be reading your post wrong... but I see you're using a 3 line system.... which isn't needed.

A simple 2 line tank, with a T fitting somewhere on the clunk-to-carb line, with fuel dot on side of plane to fill/drain, and the vent line routed over the top of the tank and down.... very simple and very effective. I do this exactly as done in the above video.

Maybe I'm not understanding, but why a 3 line tank?... is there a reason I'm not seeing?..

The only down side to a two line system is that , Should the fuel dot tygon slip off the Dot nipple, you will have air in the feed/carb line = Dead stick.

same can occur with a T-piece or and inline filter but Not so much of a risk and that would be more of a slight leak at one of the fittings.

So the 3 Line is more solid / reliable setup But i have used 2 line and its been fine too

Originally Posted by DGrant

If you plan to drain that tank, you'll need access to the clunk line. I install a T in the clunk/carb line, and then the fuel dot is ran from there to side of plane.

That way I can fill, or drain from that dot... and yes ... you can't beat a good fuel dot... a nice aluminum machined dot is bullet proof.... and leak proof.

If you put a fill line in the top of the tank, you won't be able to drain it. I may be reading your post wrong... but I see you're using a 3 line system.... which isn't needed.

A simple 2 line tank, with a T fitting somewhere on the clunk-to-carb line, with fuel dot on side of plane to fill/drain, and the vent line routed over the top of the tank and down.... very simple and very effective. I do this exactly as done in the above video.

Maybe I'm not understanding, but why a 3 line tank?... is there a reason I'm not seeing?..

I prefer the 3 line system as it removes another possible failure point as previously mentioned by Hodge.

If setup correctly, you are able to fill and drain from the dedicated fuel dot line. Below is a pic of my standard go to tank setup which uses a hard line as the fill/drain.

or put the fill line to the bottom of tank and you can defuel no problem

Originally Posted by slothead

or put the fill line to the bottom of tank and you can defuel no problem

Although possible, if the fitting leaked, oh what a mess....

I like to keep my fitting on the top, again trying to eliminate as many possible failure points as possible.

fuel dot above fuel tank no problem fill line comes off tank you did not secure it very well...

I put a cluck on both the carb and fill/drain lines.

Thanks for all of the response. I decided to go with the KISS theory. Went withe a three line tank and a fuel dot, works great !

Originally Posted by The Hodge

yeah that type of Fueler idea was great in Theory and while new, But In practice not a Brilliant setup

Fuel dot works great and is a solid setup with a 3 line tank.

I never even liked those DuBro fuelers on glow. Tried one once and threw it out... leaky, tended to fill up with crud.

I used to just pull the line off the carb on my glows, or use a 3 line.