Getting a positive seal with the parts supplied in the FFR kit has proven to be a challenge and requires you to drill a hole in both fuel tanks.  The thin white teflon washers have a proven track record of “squishing out” the sides of the fittings, opening up a hole for fuel to leak out.  Tank wall thickness can also vary inside the drilled holes where the plastic on one side of the hole might be considerably thicker or thinner than the other side of the hole…and with the teflon washers being so thin, there isn’t much compliance in this system to make up for the difference in wall thickness and you end up with the washer being pinched tight on one side of the fitting and loose on the other side of the fitting.

This kit includes 4 thick, square cut O-rings, 2 round “retainer rings” that fit snug on the OD of the square cut O-rings as well as 2 “retainer washers”.  To install, you would first install the square cut O-ring on your AN fitting, along with one of the round retaining rings centered on the O-ring, and then put the fitting thru the tank.  Place another square-cut O-ring on the inside followed by an aluminum retainer washer followed by the nut.  Position the retaining ring right in the center of the square-cut O-ring and tighten the nut.  As the nut is tightened and the square-cut O-ring attempts to “squish out” it securely locks the retaining ring in place so it can not move, while the retaining ring prevents the O-ring from being able to squish out from behind the AN fitting to cause a leak.  The retainer washer inside the tank prevents the inside O-ring from squishing out from behind the washer.

This kit contains:

4 –  Square Cut O-rings

2 – Aluminum O-ring “Retainer Rings”

2 – Aluminum Retainer Washers

Installation note:  DO NOT OVER-TIGHTEN!   You can use the photos below as a good guide as to how the O-rings should look when properly tightened.