NOVUS NV20SWP 2 in Semi-Trash Pump
#3 in Up to 2 inFull review
A low-cost 2 in pump with a two-year warranty, for pools, ponds and irrigation.
Amazon $239.99$239.99
The NOVUS NV20SWP 2 in Semi-Trash Pump is the better gas water pump overall, rated 3.4 to 3.1. The NOVUS NV20SWP 2 in Semi-Trash Pump leads on value. The Generac PRO ST20-S wins on warranty, flow and head. The NOVUS NV20SWP 2 in Semi-Trash Pump costs $459.01 less ($239.99 vs $699).
Generac PRO ST20-S
#9 in Up to 2 inFull review
A well-made 2 in semi-trash pump with a long run time and a three-year warranty, for homeowners who drain pools and yards every year.
A.P. Electric $699$699
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 NOVUS NV20SWP 2 in Semi-Trash Pump for value ($1.70 per gpm ($239.99, 141 gpm) vs $4.42 per gpm ($699, 158 gpm)).
- Choose the Generac PRO ST20-S for warranty (3-year warranty for home use vs 2-year warranty for home use), flow (158 gpm maximum vs 141 gpm maximum) and head (108 ft maximum head vs 100 ft maximum head).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 2 in gas water pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | NOVUS NV20SWP 2 in Semi-Trash Pump | Generac PRO ST20-S |
|---|---|---|
| Overall rating | 3.4/5 | 3.1/5 |
| Value 30% | 95 $1.70 per gpm ($239.99, 141 gpm) | 53 $4.42 per gpm ($699, 158 gpm) |
| Flow 15% | 34 141 gpm maximum | 48 158 gpm maximum |
| Head 10% | 67 100 ft maximum head | 80 108 ft maximum head |
| Solids 15% | 50 solids size not published (neutral score used) | 6 passes solids up to 0.3 in |
| Warranty 30% | 25 2-year warranty for home use | 50 3-year warranty for home use |
Specifications
| NOVUS NV20SWP 2 in Semi-Trash Pump | Generac PRO ST20-S | |
|---|---|---|
| Pumping | ||
| Type | Semi-trash | Semi-trash |
| Ports | 2 in | 2 in |
| Maximum flow | 141 gpm | 158 gpm |
| Maximum head | 100 ft | 108 ft |
| Suction lift | 23 ft | 26 ft |
| Largest solids | - | 0.3 in |
| Engine and build | ||
| Engine | NOVUS OHV, 212 cc | Generac G-Force OHC, 169 cc |
| Fuel tank | - | 3 gal |
| Runtime on a tank | - | 5 hr |
| Weight | - | 65.3 lb |
| Warranty | 2 years | 3 years |