All 400 Series spin-on fuel filter/water separators feature a hand (palm) operated fuel priming pump which simplifies service procedures. These filters also feature multiple fuel ports (two inlets and two outlets) and a unitized mounting bracket for installation convenience. Additional 400 Series features include spin-on, high-capacity, AquablocII replaceable filter elements which stop water and removes solid contamination. Also included are spin-on contaminant collection bowls. The clear bowls used with these filters will not discolor from alcohol, additives, or UV light and have a leak-proof, positive seal, self-venting drain for easy servicing. Max pressure 30 psi.