GPI M-150 Series Fuel Transfer Pump 15 GPM - Mobile 12V Transfer

In this review of the GPI M-150 Series Fuel Transfer Pump the author finds a robust mobile pumping solution for tradespeople and fleet operators who need reliable, fast transfer from truck or trailer tanks. The single biggest reason to buy is the pump's combination of a 15 GPM rotary gear design and an automatic shut-off nozzle, which together deliver quick, controlled fueling while minimizing wear. Installation is straightforward due to the factory-installed power cord and spin collar, making this review particularly relevant for anyone installing a 12V transfer pump on the road.

Key Features

• 15 GPM flow: High transfer speed reduces refueling time for vehicles and equipment, letting multiple tanks be filled quickly on job sites.
• Rotary gear design: Fewer moving parts mean less internal friction and wear, which contributes to lower maintenance needs and longer pump life.
• Automatic shut-off nozzle: The nozzle stops flow automatically to prevent overfills and make dispensing more convenient and safer.
• Diecast aluminum housing: Lightweight construction reduces stress on the tank bung and simplifies handling during installation and service.
• Factory-installed power cord and spin collar: Built-in components speed up installation and provide a secure electrical and mechanical connection for mobile setups.
• Versatile fuel compatibility: Works with gasoline blends up to E15, diesel blends up to B20 and kerosene, so it fits a variety of fleet needs.

Who It's For

The GPI M-150 is best for mobile users who need a durable 12V pump for truck- or trailer-mounted tanks, including contractors, farmers and service fleets that demand fast transfer and low maintenance. Its lockable nozzle holder and automatic shut-off make it suitable for unattended jobsite fueling where theft deterrence and safe dispensing matter.

This pump is not aimed at low-volume hobby users or those who need a quiet, indoor pump for garages; its focus is on throughput and ruggedness. Customers who need pumping of fuels outside the listed compatibilities should look for a model specifically rated for those fluids.

Pros & Cons

Pros

• Fast 15 GPM flow for efficient refueling and reduced downtime.
• Durable rotary gear design and diecast aluminum housing for long life and lighter weight.
• Convenient, ready-to-install kit including nozzle, hose, power cord and tank adapter.

Cons

• Some users report mixed impressions of capacity for very large transfers, so it may require multiple fills for big tanks.
• Considered pricey by a portion of customers, which may be a factor for cost-sensitive buyers.

Specifications

Flow rate	15 GPM
Power	12V DC (factory-installed cord)
Nozzle	Automatic unleaded shut-off
Housing	Diecast aluminum
Fuel compatibility	Gasoline up to E15, diesel up to B20, kerosene
Included	Pump, nozzle, lockable holder, hose, suction pipe, tank adapter, fuse, manual
Design	Rotary gear with strainer and poppet

Our Verdict

The GPI M-150 Series pump is a solid choice for professionals who need a fast, durable 12V transfer pump with an automatic shut-off nozzle and easy installation. It delivers strong throughput and low upkeep thanks to its rotary gear design and lightweight housing, making it good value for users who prioritize reliability and speed despite a higher upfront cost.

Frequently Asked Questions

Can this pump handle diesel and gasoline?
Yes. It is compatible with gasoline blends up to E15, diesel blends up to B20 and kerosene.

Is installation difficult for a truck tank?
No. The factory-installed power cord and spin collar, along with the tank adapter and telescoping suction pipe, make truck or trailer installation straightforward for most users.

Does the nozzle lock when not in use?
It includes a lockable nozzle holder to secure the nozzle and deter theft when the pump is not in use.