I'm replacing my stock type fuel pump that has a connection for rubber hose on the inlet and then the outlet is threaded for 3/8th pipe I believe, and from there I have hardline that goes up and connects to dual feed line with a small rubber piece.

I just bought a new fuel pump that has 1/4 NPT inlet and outlet fittings. I'm clueless as to how to get this to work. I suck with fittings, looked at a hardware store and found what I would think would work on the inlet side(1/4th to 3/8th barbed) but it says MPT, not NPT so I don't know what the heck that means. Can anyone help me out on how to get this thing plumbed? I would like to retain my hardline coming out of the pump now as it is perfectly bent. Some kind of adapter required? Is this auto zone stuff or like plumbing at a hardware type stuff?

Thanks for the help.

The outlet of the old pump is probably NOT pipe thread. I would expect it to be 3/8 flare tubing, using a 3/8 tube nut.

NPT is "National Pipe Thread". MPT is "Male Pipe Thread" as opposed to Female pipe thread. Your 1/4 MPT barbed fitting should be fine. On the outlet side, you need 1/4 MPT X 3/8 female flare tubing adaptor.

You're looking for BRASS fittings, not galvanized, and any REAL auto parts store has them, probably in an Edelman display. You might also find them in the brass section of a home improvement store like Menards or Lowes.

Thanks for clearing that up. I didn't realize that NPT and MPT were the same thing, it just refers to the male/female side.

AGNS,

I humbly suggest that you've now got the wrong pump. If this is for a BB application the inlet/outlet of the pump should be 3/8's.

You can certainly cobble together enough fittings to make it work, or go to our sponsors web site and identify and purchase the correct pump that will have the correct output to work with your hardline.

JMO....

Dan

Its a small block. And is the reccomended street pump for Small Blocks from Carter- M6900.