Delavan Oil Burner Nozzle, 3.25 x 80BZ w/ Check Valve – Genuine OEM by | Jul 25, 2026Oil Burner Nozzle, 3.25 x 80BZ w/ Check Valve. This sintered filter is designed to reduce plugged fuel nozzles, eliminate excessive smoking of the burner at start-up, and reduce soot buildup in the pressure washer coil.