Fuel Tank Drain Plug Size

link to an old thread on this subject. http://pantera.infopop.cc/eve/forums/a/tpc/f/5650045562...020031873#4020031873

Part number wise, it is 22MM by 1.0 pitch.

quote:

Originally posted by ROVERLTD:
link to an old thread on this subject. http://pantera.infopop.cc/eve/forums/a/tpc/f/5650045562...020031873#4020031873

Part number wise, it is 22MM by 1.0 pitch.

No it's 22mm with 1.5mm pitch for steel tanks and 16mm with 1.5mm pitch for later cars with aluminium tank.

Thanks Guys, that's exactly what I need.

The only problem is that isn't a very common part. It's going to be difficult to find.

Yup, that's what I thought. The two largest suppliers of metric fasteners don't carry anything that large.

OK, Fredrick, where'd ya' get the parts? Probably in a Euro Home Depot, right?

Help me! Excuse me, I have to go bang my head on the wall now!

quote:

Originally posted by PanteraDoug:
Yup, that's what I thought. The two largest suppliers of metric fasteners don't carry anything that large.

OK, Fredrick, where'd ya' get the parts? Probably in a Euro Home Depot, right?

Help me! Excuse me, I have to go bang my head on the wall now!

I bought the parts from a tractor parts supplier here in Sweden! I paid $20 for the parts and almost the same for the shipping!

I think you can find the parts here also. Link

I used a AN10 hose with 1/2" inner diameter from Earls.

The 22mm size of the fluid/hollow bolt is the problem.
It is a very large size for us here in the US.
The largest I can find is 16mm.

I can't find anyone that even has a reducer to go down from 22mm to 12 or 10mm.

The 12 or 10mm hollow bolt is very common in Earl's or Aeroquip.

I can't even make my own because I don't have taps and dies 22mm.

This is the biggest problem. Once I can reduce the 22mm it will be a piece of cake!

Doug 22mm = aprox 3/4" try Mc master car for adapters to NPT. or you can get a 3/4 NPT tap and tap out the tank it could be 1" ? if you have the 22mm Plug .. take it drill it out to 1/2 NPT and your done. If your car flows more then 1/2 NPT ( ID ) your going to need 2 gas tanks ...LOL or if you want I'll drill it and tap it for you in my shop in about 2 minutes.

22mm = .866".

Drilling it out to npt is the next best alternative I agree. Simplest is to use a 22-1.5 to 12mm-1.5 reducer fitting, put a banjo to -6 and a fluid bolt/hollow bolt on it.

I still have to pull the plug out and see what the Detomaso's gave me to work with. The bushing needs some meat to go to 3/4npt. No sense in leaving it too thin, with a brass to steel factory fitting soldered in there.

It is for a return line for the EFI. A -6 hose is all it needs.

The question is how to get for point "A" to point "B" by the simplest route.

The tank is in the car and will not be coming out anytime soon. At least that is plan A.

Thanks for the suggestions.

Hey Doug,

Pegasus Auto Racing has something that may do the job, go to the link below, look in the upper right hand corner:

http://s2.pegasusautoracing.com/2006/082.pdf

I don't see why it won't work. It's cheap and available. Instead of a banjo it takes a 90 hose end. Works for me.

Wow. What kind of search engine do you have? Fantastic job GP. Drinks on the house for everybody! Did I say that? Geeze!

Great find George and it probably will work ..but its not the correct fitting. I checked the plug removed from my tank and its a 22mm Tapered thread in the bottom. The fitting on Pegasus it a straight thread and may work with the o ring as a gasket .. but be sure to file the bottom smooth so the o ring seats.

A 3/4 NPT tap works .. 3/4 is ID 1 1/16 " OD and theres enough meat to tap it.

I would nt use those banjo fittings .. your flowing liquid and all those sharp turns and small holes are restricive. Your defeating the purpose.

This is why the fitting George found is the next best thing to tapping it out you can use a Radius'd 90 with a smooth bend to flow fuel.

My 2 cents.

This is one of the reasons that one needs to do a "look-see".
Apparently there were a few details left out of the 22x1.5mm fluid bolt/banjo install. But that's ok.

Everyone is just trying to help.

22x1.5mm taps are as scarce as hens teeth around here.

Like I said, 3/4npt was the next best thing. Now it is the way to go. No problem on those tap sizes here.

Thanks for checking it out Ron.

GENTS,
PEGASUS IS GOOD AND THIS IS BETTER!
http://cgenterprises.com/magneticdrainplugs/pipe_plugs_metric.htm
http://www.powerflexind.com/table.htm http://www.parker.com/BRASSPROD/CAT05/3501-F.PDF
"this has metric to standard and others"

http://www.tecopneumatic.com/catalogs/norgren/pdfs/fittings/fit04.pdf http://www.tecopneumatic.com/catalogs/norgren/fittings.htm



MARK

SC, those are plugs. I need an adaptor, not a plug. Thanks anyway.

PD,
TAKE ANOTHER LOOK AT MY LAST POST, FOUND SOME MORE INFO.
TRY ON YOUR SEARCH M-22 X 1.5 FITTINGS.
MORE THINGS COME UP, BUT ITS A BOOGER.

MARK

Yup, you found more.

As I read them (sometimes I am semi-literate), the first one is just plugs.

Parker shows an adaptor but does not indicate the metric thread is a tapered thread.

I live near the NYC retail/distributor for Parker/Weatherhead.

Metric fittings, regardless of if they are in the catalog or not, are not available.

I can't find someone to buy them from to try anything. Everything is a BFD with this thing.

Taping to NPT looks like the simplest fitting by far. Even if I just want to plug the drain back up, I can plug it with a 3/4NPT.

When I ran fuel injection on my car I removed the plug and screwed in a 1/2" male pipe x 1/2" male flare elbow. Then used -8 hose to connect from there to the pump. It is possible that not all tanks are the same however.
Good luck,
Forest

Ron, only the PLUG is tappered. The bung is not!
The 22x1.5 adapter from Pegasis should work with no problem. Particularly with the o-ring.

That can probably be swapped for a copper gasket I'll bet.

Also point of noteworthiness: 1)1/2npt will physisically fit the factory tank bung as it exists.

2)The difference between the two is that the 1/2npt has a thread pitch of 1.75mm instead of 1.50mm.
I am tempted to just run a 1/2npt tap through it and use an o-ring adapter to seal it.

3)the location of the bung makes it very important to hold the fuel line as close to the tank as possible.

Although the the nice radius bend hose ends are signifigant to fuel flow I suppose, even with a 120 degree end the line is projected into harms way. A banjo or maybe one of Earls fancy flex-o-ring pipe to jic would be acceptable. Especially if it is just a return.

I was going to use this drain for a return line for the EFI.
Considering that I took 6 gallons out of the tank when I thought it was empty is a very poor reflection on my Holley Electric fuel pump. I knew I had fuel in the tank and had originally located the electric fuel pump in a way that it could be used to power drain the tank. I used it that way here until it ran dry. The only thing is that there were still 6 gallons in the tank. I think there is something wrong here?

This car is unreal. It is just a never ending sagga of twist upon twist. The term, of "opening a can of worns" really seems appropriate now.
Granted it isn't even an Italian fuel pump? Holley wasn't Italian...right?
Will it ever stop?

Well you never know? Who would of thought a guy named Weber was Italian?

Oh, Forest, you are right on with the 1/2npt fitting. The 1/2npt does screw in!
There is a difference in the thread pitches though. The 22mm plug is a 1.5 pitch and the 1/2npt is a 1.75 pitch.

It explains why you were able to install it tighly though.