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FREQUENTLY ASKED QUESTIONS

WARRANTY / SALES

What kind of warranty does GPI offer?
Our products are warranted against manufacturer defects. If you are experiencing a problem with your GPI product, please note the model, the serial number, and the date of manufacture from the pump. Then call Customer Service at 1-800-835-0113 and we will assist in troubleshooting the problem and advise on how to proceed.
How long is the warranty on my pump?
There is no universal length. The electric transfer pumps feature a two-year warranty and our GPRO fuel pumps offer a four-year warranty, with the exception of the L5016, L5116, and L5132 oil pumps which feature a one-year warranty. The HP-100, HP-90, DP-20, and RP-10 hand pumps also feature a two-year warranty while the RP-5, LP-50, BP-12, CP-5, and BP-10 hand pumps feature a 90-day warranty.
How long is the warranty on the meter products?
The QM240 and QM150 fuel meters feature a four-year warranty. The M30 fuel meters feature a four-year warranty. The 01A series meters, and FM-300H feature a two-year warranty. The 03A series meters, LM51DN, LM-300, 01N & 03N feature a one-year warranty. Accessories feature a 90-day warranty.
I’ve lost my owner’s manual. Is it available to download?
Yes. The manuals, which include installation instructions, troubleshooting tips, illustrated parts drawings, specifications, and more are available at: http://www.gpi.net/fuel-products/manuals/
Do you sell your products directly to users?
No. We sell our products only through our distributors. Our distributors are very knowledgeable about our products. However, if you need extra assistance with choosing the correct product for your needs, we are happy to help. Please call 1-800-835-0113.

TROUBLESHOOTING

What troubleshooting resources are available?
There are troubleshooting tips in the manuals. There are troubleshooting videos, as well as product videos, at: https://www.youtube.com/channel/UCapmzVmy4GlZEF9Ru4YaP2g/videos?disable_polymer=1 You’re distributor can often assist. You can also call Customer Service at 1-800-835-0113.
Why am I not getting the flow rate advertised for my pump?
The flow rate of the pumps are rated at the pump outlet. This is because anything added afterwards will affect the flow rate. For example, a longer hose/automatic nozzle/dirty filter will reduce the flow more than a shorter hose/manual nozzle/clean filter.
Why doesn't my hand pump remain primed?
The pumps are designed to lose prime as a safety feature. This prevents them from siphoning out of the tank if the hose fell below the fuel level in the tank.
Do the electric pumps retain a prime?
The electric pumps are designed to lose prime as a safety feature to keep the fuel from accidentally siphoning out of the tank. However, some of the vane pumps feature a check valve designed to keep fuel in the pump chamber.
Why is my 12-volt pump sucking air from the nozzle?
The pump is wired backwards. Check wiring and insure red is on positive and black is on negative.
The telescoping suction pipe included with my pump will not collapse to the 15" measurement advertised.
There are two lengths to the suction pipe. One is the telescoping portion and the other is a straight extension. Simply remove the straight extension, set it aside, and then attach only the telescoping section to the pump.
My pump will not prime, what can I do?
Insure that everything is clear of debris like the suction pipe, strainer, hose and nozzle. Run the pump without a filter, if one is present, as the filter could be clogged. If you are using a hose longer than the one it came with, try a shorter hose. All of the above can cause excess backpressure simulating a closed nozzle. This can send the pump into bypass mode. If none of this applies, check the seal on the poppet valve (bypass valve). It may be damaged, gone, or not sealing due to debris.

INSTALLATION / APPLICATION

What maximum hose length is recommended for my pump?
If you do add extra hose, the following things can happen.
1) Your rate of flow will suffer due to the unpredictable amount of added backpressure.
2) Your motor will be working harder more frequently which will reduce the life of the motor.
3) If the unit experiences enough backpressure due excessive hose or too many accessories, this could simulate a closed nozzle and send the pump into bypass mode.
Why are the EZ-8 and GP8 not sold with an automatic-shutoff nozzle? Can I substitute an automatic nozzle with these pumps?
The EZ-8 and GP8 are not recommended for use with an automatic nozzle. The added backwards pressure can force the pump into bypass and reduce or completely eliminate flow. Then some automatic nozzles require a higher flow rate then the EZ8 or G8P can produce and this will affect the automatic nozzle from shutting off when the tank is full and over flowing the tank.
Can I install my pump vertically?
No. The bearings are installed at specific points along the motor armature shafts and are designed to run only while running horizontally. Running the units vertically will produce unknown variables and could create unusual wear patters within the armature bearings while the armature is spinning.
Can I use an automatic-shutoff fuel nozzle with any GPI hand pump?
No. All our hand pumps, whether it’s the piston, diaphragm or rotary, need to be used with an open ended nozzle. Using an automatic nozzle will not let the fuel flow through the hand pump and can cause damage to the seals of the pump as it builds up pressure.
Can I use any nozzle with a GPI gear pump?
We do not recommend non-GPI nozzles be used with GPI pumps. Our nozzles are specially designed to create the least amount of back pressure. This will promote better fuel flow and less of a chance of going into bypass when it should be pumping.
What’s the maximum suction lift of my fuel pump?
That depends on the model of pump you have. See specifications in the back of the pumps owner’s manual.
Does GPI manufacture any pumps that are dual voltage rated?
Yes, the motors for the PRO35 are wired and rated for either 115 VAC or 230 VAC.
Do you have any pumps that work with water?
No, we only have fuel, oil, and chemical pumps.
Can the electric pumps be mounted outside?
The fuel pumps and most of the others can be mounted outside. The exception is the Heavy Duty Oil Pumps (L5016, L5116, and L5132) which must be mounted inside.
I bought a 12vdc (vehicle power) pump but want to use it with 115vac (household wiring). How do I convert it?
This is not possible.
I bought a 115vac (household wiring) pump but want to use it with 12vdc (vehicle power). How do I convert it?
This is not possible.
Is the bypass pressure on my pump adjustable?
No.
What is the difference between the M-150S-EM and the other M-150S models?
1. The M-150S-EM (and the M-150S-E-PO) is the Economy Model and is direct mounted. This requires the entire pump assembly to be turned to thread the pump on and off of the tank. The standard versions feature a "Spin Collar" which allows you to face the pump in the preferred direction and tighten the spin collar onto the bung adapter without turning the pump/motor. This is particularly helpful when turning the pump would collide with the truck or another structure.

2. The bung adapter that comes with the standard M-150S is designed to be the weak point. If you accidently brake the pump off of your fuel tank the bung adapter can easily be replaced. The economy model (M-150S-EM or M-150S-E-PO) does not have a bung adapter. If you accidently brake an economy model pump off of your fuel tank chances are you will be replacing the entire pump.
Does GPI have any pumps that will work with Methanol or Ethanol fuels?
Yes, we offer three different gear pumps, two 12vdc and one 115vac, that would work for that application. They are nickel plated to ensure long life and trouble free performance.
Are the methanol pumps available with nozzle, hose, and suction tube.
No. We do not offer these accessories for methanol. We do not have a supplier to recommend for these accessories but the internet is a great resource for locating a local supplier of methanol accessories.
Are the aviation fuel pumps available with nozzle, hose, and suction tube?
No. We do not offer these accessories for aviation fuel. We do not have a supplier to recommend for these accessories but the internet is a great resource for locating a local supplier of aviation fuel accessories.
What is the RPMs/ Horsepower/ Amp draw of my pump?
All UL rated pumps have tags riveted to the pump head or motor that show the motor specs such as Voltage, RPMs, H.P., Duty cycle, Amp draw, Hazardous Location rating, operating temperature. This information can also be found on our website or in the back of the owner’s manual.
When mounted to a tank in my truck, do I need to ground my pump to my truck?
To ensure safe operation, all fuel transfer systems must be properly grounded. Proper grounding means a continuous metal-to-metal contact from one component to the next, including tank, bung, pump, meter, filter, hose, and nozzle. Care should be taken to ensure proper grounding during initial installation and after any service or repair procedures. While in most cases it is not needed, a separate grounding connection is provided. See the manual for details.

MISCELLANEOUS

Are there parts available for the 01 series meter?
No. The 01 series meter is an economy meter, so they do not have field replicable internals. The display needs to be matched to the turbine body, so they need to be manufactured together. It is less expensive to buy a new meter than to send a turbine body back to have a display manufactured to match it.
Where can I purchase replacement parts for my GPI product?
You can purchase parts through your distributor. If you cannot locate a distributor, please call GPI Customer Service at 1-800-835-0113.
Where can I get additional information about, or assistance with, GPI products?
Either through your distributor or by calling 1-800-835-0113.
What hours is Customer Service available?
Customer Service, at 1-800-835-0113, is available Monday to Friday from 8:00am to 5:00pm Central Standard Time.
Can I bypass the switch on my 12VDC M-150S or M-180S to troubleshoot a faulty switch?
Yes. After disconnecting the pump from its power supply, remove the 3 bolts holding the switch cover plate in place. Once removed, two red wires will be visible on the left side of the switch cavity. The solid red wire must be connected to the red wire with a white stripe in order to bypass the switch. These two wires must be disconnected from the switch assembly in order to be connected. After ensuring the two connected wires will not contact any other surfaces or arc, for safety sake, you must then reinstall the switch cover plate. The pump may be reconnected to the power supply and the motor will immediately turn on if the motor is not defective.
Can I bypass the switch on my 12VDC EZ-8 to troubleshoot a faulty switch?
Yes. After disconnecting the pump from its power supply, remove the 6 bolts holding the switch cover plate in place. Once removed, two wires will be visible passing through the right cavity and connecting to the switch. The solid red wire must be connected to the red wire with a white stripe in order to bypass the switch. These two wires must be disconnected from the switch assembly in order to be connected. After ensuring the two connected wires will not contact any other surfaces or arc, for safety sake, you must then reinstall the switch cover plate. The pump may be reconnected to the power supply and the motor will immediately turn on if the motor is not defective.
Can my Oil Pump be rewired to run backwards?
Following the wiring diagram on the motor sticker the motor may be wired to run backwards. This will not guarantee the same flow ratings or life expectancy of the unit as this is not the intended use of the pump.
PUMPS: GPI Aviation Fuel pumps are sold as pump only kits because we do not supply a hose, nozzle or suction pipe approved for use w/ aviation fuel. We do not have a supplier to recommend for these accessories but the internet is a great resource for locating a local distributor.
METERS: Digital fuel meters used w/ an electric fuel pump kit should be installed at the end of the hose before the nozzle. This installation is recommended so that any vibration created by the pump is dampened as it travels thru the hose before it reaches the meter –excessive vibration can spin the rotors causing inaccurate readings. Another benefit of this installation is electric motors produce electromagnetic interference (EMI) which can affect the digital meter’s computer. Increasing the distance between the pump and motor lessens any EMI effects on the meter.
Great Plains Industries