GPI G20 12V 20 GPM with Filter
#3 in 12V DCFull review
The most complete 12V diesel kit short of continuous duty: filter, auto nozzle and long hose. Worth it for anyone fueling common-rail diesel equipment from a field tank.
Amazon $839.99$839.99
The GPI G20 12V 20 GPM with Filter and the GPI M-180S 12V 18 GPM are evenly matched, rated 3.9 and 3.9. The GPI G20 12V 20 GPM with Filter leads on flow and kit. The GPI M-180S 12V 18 GPM wins on price. The GPI M-180S 12V 18 GPM costs $225 less ($614.99 vs $839.99).
GPI M-180S 12V 18 GPM
#4 in 12V DCFull review
A strong all-round 12V kit: faster than the 15 GPM pumps, hands-free filling and theft-resistant. Pick it if you fill several machines a day.
Amazon $614.99$614.99
Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the GPI G20 12V 20 GPM with Filter for flow (20 gpm vs 18 gpm) and kit (auto nozzle, filter, suction pipe, 14 ft hose vs auto nozzle, suction pipe, 12 ft hose).
- Choose the GPI M-180S 12V 18 GPM for price ($614.99 vs $839.99).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 12V DC fuel transfer pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | GPI G20 12V 20 GPM with Filter | GPI M-180S 12V 18 GPM |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Price 20% | 29 $839.99 | 44 $614.99 |
| Flow 25% | 75 20 gpm | 65 18 gpm |
| Duty cycle 15% | 50 30 min on, then rest | 50 30 min on, then rest |
| Safety listing 15% | 100 UL listed, explosion-proof motor | 100 UL listed, explosion-proof motor |
| Kit 10% | 68 auto nozzle, filter, suction pipe, 14 ft hose | 55 auto nozzle, suction pipe, 12 ft hose |
| Warranty 15% | 100 limited lifetime warranty | 100 limited lifetime warranty |
Specifications
| GPI G20 12V 20 GPM with Filter | GPI M-180S 12V 18 GPM | |
|---|---|---|
| Pump | ||
| Power | 12V DC | 12V DC |
| Flow | 20 gpm | 18 gpm |
| Duty cycle | 30 min on | 30 min on |
| Current | 34 A | 20 A |
| Max pressure | 12 psi | 15 psi |
| Max head | 15 ft | 15 ft |
| Mount | Bung | Bung |
| Safety | ||
| UL listed | Yes | Yes |
| Explosion-proof motor | Yes | Yes |
| Gasoline approved | Yes | Yes |
| In the box | ||
| Meter | No | No |
| Nozzle | Automatic | Automatic |
| Hose | 14 ft | 12 ft |
| Filter | Yes | No |
| Suction pipe | Yes | Yes |
| Power cable | 18 ft | 18 ft |
| Build | ||
| Weight | 19 lb | - |
| Warranty | Limited lifetime | Limited lifetime |