Multiquip QP3TH
#5 in 3 in and upFull review
A heavy-duty 3 in trash pump for construction and flood work with large debris. More pump than most homeowners need.
HVACDirect $1,999$1,999
The Multiquip QP3TH is the better gas water pump overall, rated 3.5 to 3.3. The Multiquip QP3TH leads on flow and head. The Koshin STH-80X wins on value. The Koshin STH-80X costs $1,273.46 less ($725.54 vs $1,999).
Koshin STH-80X
#9 in 3 in and upFull review
A Japanese-built 3 in semi-trash pump with a Honda engine, for dewatering and irrigation.
Amazon $725.54$725.54
Prices were last checked November 2, 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 Multiquip QP3TH for flow (396 gpm maximum vs 238 gpm maximum) and head (95 ft maximum head vs 85 ft maximum head).
- Choose the Koshin STH-80X for value ($3.05 per gpm ($725.54, 238 gpm) vs $5.05 per gpm ($1,999, 396 gpm)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 3 in and up gas water pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Multiquip QP3TH | Koshin STH-80X |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Value 30% | 47 $5.05 per gpm ($1,999, 396 gpm) | 69 $3.05 per gpm ($725.54, 238 gpm) |
| Flow 15% | 98 396 gpm maximum | 19 238 gpm maximum |
| Head 10% | 58 95 ft maximum head | 42 85 ft maximum head |
| Solids 15% | 100 passes solids up to 1.5 in | 50 solids size not published (neutral score used) |
| Warranty 30% | 25 2-year warranty for home use | 50 warranty not published (neutral score used) |
Specifications
| Multiquip QP3TH | Koshin STH-80X | |
|---|---|---|
| Pumping | ||
| Type | Trash | Semi-trash |
| Ports | 3 in | 3 in |
| Maximum flow | 396 gpm | 238 gpm |
| Maximum head | 95 ft | 85 ft |
| Suction lift | 25 ft | 26 ft |
| Largest solids | 1.5 in | - |
| Engine and build | ||
| Engine | Honda GX240, 270 cc | Honda GX160, 163 cc |
| Fuel tank | 1.4 gal | 0.8 gal |
| Runtime on a tank | 2.4 hr | 2 hr |
| Weight | 142.2 lb | - |
| Warranty | 2 years | - |