GPH - Gallons per Hour
12 Volt Water Pumps are used for boats, homes, and campers and are considered a Harbor Freight Tool. 12 volt water pumps pump up to 200 gph, and are not to be used with fuel or flammable liquids.
100 gph
13 gph
3-5 gph depending on the load.
28 to 32 gph at 500 to 600 hp
For most ponds with fish you need to circulate the total volume of the pond once per hour. So for a 165 gallon pond, you theoretically need at least a 165 GPH (gallon per hour) pump. However, not all pumps are created equal, and the flow rate of pumps is usually rated at zero head pressure and with nothing attached. So a 165 GPH pump on the bottom of a 2 foot deep pond with a few feet of tubing and maybe a water feature or waterfall could reduce that 165 GPH to perhaps 100 GPH or less. So for a 165 gallon pond, you would probably want to look at 250-350 GPH pumps. If you have an above average fish load or a large waterfall or stream attached, you may want to go even larger.
Most fuel pumps for fuel injected vehicles will cost more than $100.00, U.S.
On the in-tank fuel pump, or pumps if you have two tanks.
Earlier carburated vehicles used external fuel pumps.
If fuel pumps were not necessary, there would not have any on your car! If there is a problem with your fuel pumps, your car will not start, or it will start but it won't run for very long.
14.5 psi
1.5 to 2.3 GPH as per the John Deere brochure