21GU Mis-Filling Prevention Device (MFPD)
Permanently Installed In DEF Tank Fill Pipe
The OPW Mis Filling Prevention Device for 21Gu nozzles offers the most effective and affordable insurance policy against mis filling mishaps in the industry actually stopping them before they happen. There is no better way to protect your investment and the environment. Eliminates the risk of accidental DEF mis filling.
