What are the different types of fuel line fittings?
The fittings we will discuss are Adapter Fittings (also called Standard, or Union), Port Fittings, and Pipe Fittings, as well as thread types and size standards associated with each. Before we get into the types of fittings we’ll first define the thread types used on the fittings, as well as discuss applicable AN standards.
How big does a fuel pump fitting need to be?
These two lines do not involve significant amounts of flow, and therefore do not require larger sizes. Typically, the port sizes used with these smaller sizes use a 1/8″- NPT. 1/8″-NPT fittings are very common and can easily be used to adapt to -3AN or -4AN line.
Why are O-ring seals used in fuel line fittings?
Use of The O-ring seals allow for greater sealing ability with very high reliability of installation as compared to Tapered Thread using sealing compounds or Teflon tape. Pipe Fittings Pipe Fittings can be used to connect fuel lines to the port on a fuel pump or fuel pressure regulator, as well as connect fuel pressure gauges to gauge ports.
Can you use tapered thread on fuel line fittings?
The Tapered Thread on the port end of the fitting must use sealing compound or Teflon tape to help avoid leakage. However, in high-pressure fuel system applications this method has proven more leak prone than the O-ring seal method used with Straight Thread fittings.
Where can I get new fuel line fittings?
AutoZone carries hundreds of thousands of parts and accessories. Select your Year, Make, Model and Engine to find those that fit your vehicle. Shop at AutoZone for direct-replacement Fuel Line Connectors. Rather than replacing the entire fuel line for a fuel line repair, only fix the part that is damaged.
Do you need a return line for a fuel tank?
The aluminum Fuel Tank Return Fitting provides a threaded hole in the fuel tank without having to reach inside the tank. If you are planning on running fuel injection, you will need a return line to the tank. This kit allows you to add the threaded bung with out having to do any welding.
How do you seal fuel line in plastic tank?
Push it through until the barb enters the tank. It will expand the hose enough to make a tight seal. Be sure you leave tubing to the tank long enough to fish out the end so you can attach the pick-up filter. What i do is take the current hole and get the next size up that is too big to slide in the hole.
What kind of thread is used in fuel line fittings?
National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. AN Standards High-end racing and performance fuel delivery systems most frequently implement fuel lines and fittings manufactured to AN Standards.