fuel line connectors 1/2 inch - 18 thread

[pcarew]

I wanted to connect a fuel pressure gauge to my elan fuel pump, but the fuel gauge connector has a different thread density.

The fuel pump connector is 1/2 inch 18 thread pitch I believe. The pressure gauge seems to be 20 pitch.
Car parts shops do not seem to have 1/2-18 fuel connectors. Anyone able to suggest a converter/adaptor?

Thanks
Paul

[tonyabacus]

Paul
Try your local plumbing store or one of the specialist tuning outfits like Dave Bean or RD both on your side of the water
Tony

[tonyabacus]

Paul
I was thinking a little more about your connector, it is likely to be a British Standard Pipe thread or depending whether it is the standard pump or an electric pump could be a Metric thread. So can you confirm what sort of pump you have and who made the gauge(British or other). Also do you need a connector with external threads at both ends or internal or a combination?
Tony

[oldelanman]

What fuel pump do you have ? The original AC glass bowl pump has 1/2"-20 UNF threads.

viewtopic.php?f=40&t=42686&start=

[h20hamelan]

I figure it’s gonna be a bit tough to find the exact one you’re looking for.
Easier might be to return the gauge, or go to a giant auto parts place for the fitting. But I fear you barking up a the wrong tree, as most are for domestic autos within the last 10 years. Specialty fitting place, or try Spruce Aircraft or McMaster Carr.
Sunpro should have it, this isn’t what you need but it might start the hunt.

https://www.amazon.ae/Sunpro-CP7573-Met ... B00029JXLG

[Fred Talmadge]

What I do, alt least with plumbing, is bring the parts to the store and ask, "I want to connect this to that" With the big box stores, at least you can try different fittings to see what fits so you are no longer guessing. I understand you may not want to take about the fuel system of your Elan.

[elans3]

If you want a pressure gauge to check what the carbs are getting, you should fit it at carb height ideally. I have a gauge with a T piece and two short lengths of fuel hose. When I want to check the pressure, I just undo the hose between the two carbs, and fit it temporarily between the two, I keep the gauge with t piece in the spares box in the back of the car.