These are the TPI supply and return lines, you all know where they go. But can someone tell me the type of connection or thread of these? I know the supply is 3/8 and I though that connection was a 6-AN but it's not. Is it an NPT or something else?

Thanks....

 

They are Saginaw fittings. The mating tube has a flat flange on it with an o-ring seal. There are adapters available for both ends and sizes to go to a male -6 AN.,

RBob.

 

Saginaw...I had thought that might be it but wanted to be sure. 3/8" Saginaw?

Thanks!!!

 

Metric, IIRC, the feed line is 16mm and the return is 14 mm.

RBob.

 

Thanks....since I have your ear maybe you can suggest something.

What I want to do is put a check valve in the supply line to see if the fuel is back flowing through the supply line causing hard cold starts. I got a male to female 6-AN check valve but obviously that is not going to work without a bunch of adapters. Hoping for a clean and easy solution without cutting the hose and putting in a valve with clamps.

 

Something like this work??

http://www.specialtymfg.com/catalog/...m6m_e_enp_3493

 

https://www.thirdgen.org/forums/tbi/...-fittings.html