The Professional Model Diesel Exhaust Fluid (DEF) pump is designed for a variety of DEF drum transfer applications. The FLO-FAST 8 GPM DEF Pump for Drums, coupled with our patented technology, is designed to fit industry-standard 15-, 30-, and 55-gal. barrels with a bung adapter. The FLO-FAST pump has three internal vanes that build pressure to pump and draw fluid at very high rate of 8 GPM. The pump material and construction is made to last and will get your fluid transfer operations done safe, fast and with ease.