I started out with a 12V GPI on a transfer tank around 1980 or so it's still going strong. Over the years I've replaced other hand pumps and an old Gas Boy electric pump with these repackaged 110V GPI pumps. http://www.jmesales.com/product/gpi-m-1115-smu-repackaged-115v-12gpm-pump-with-manual-nozzle,6154,4530.htm Hard to beat them on price vs ones in the farm supply stores running $345 or more. They are only 12 GPM but have been durable and trouble free for me. Only had one I had to replace the plastic gears in as they were binding up some. Think it was due to ethanol in the gasoline as the replacement gears were a different color and material. I do have one of the heavy duty large motor Tuthills I got off Ebay. Had a issue with the on off switch within a couple years where it would not switch off or on. Just left it on and killed juice to the pump with breaker. Finally tore it apart last year had to separate the end plate housing off the motor to get to the mickey mouse switch set up inside. Was afraid I would break the end housing trying to get it apart it was so tight One of the switch contacts had burned off where it would not run at all anymore. I was less than impressed by the rusty contactors and brush set up inside. Found a replacement switch that would work and got it back together so far it is working like it should but if it pukes I'll get another GPI. The Tuthill probably has a higher GPM than the GPI but I like the compact design and aluminum construction of the GPI's myself. Others mileage may vary especially if your looking for higher GPM pumps. | 
fuel transfer pump - gpi vs fillrite?
