There a many easier ways. When I updated the Shurflo in my last RV my friend took the original Shurflo and made a water transfer pump for his Hurricane, which does not have a gravity feed. Just clip it to the battery and pump in the water. Bottled water companies have a hand pump for drawing water from 5 gallon bottles. I keep one in my garage along with our Earthquake supplies. Harbor Freight has a few different fluid pump attachments for drills. Anything is better than lifting a 5 gal jug and pouring it into a funnel. JMHO