Generac T20-S
#2 in Up to 2 inFull review
A 2 in trash pump for muddy water with stones and sticks, with a long run time and a three-year warranty. For owners who deal with dirty flood water.
A.P. Electric $1,199$1,199
The Generac T20-S is the better gas water pump overall, rated 3.3 to 3.1. The Generac T20-S leads on warranty, solids and flow. The Champion 2 in Semi-Trash Pump 100742 wins on value. The Champion 2 in Semi-Trash Pump 100742 costs $754 less ($445 vs $1,199).
Champion 2 in Semi-Trash Pump 100742
#10 in Up to 2 inFull review
A ready-to-run 2 in semi-trash pump with a big fuel tank, for draining pools and flooded yards. It suits homeowners who want everything in one box.
Amazon $445$445
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 Generac T20-S for warranty (3-year warranty for home use vs 2-year warranty for home use), solids (passes solids up to 1 in vs passes solids up to 0.5 in) and flow (185 gpm maximum vs 158 gpm maximum).
- Choose the Champion 2 in Semi-Trash Pump 100742 for value ($2.82 per gpm ($445, 158 gpm) vs $6.48 per gpm ($1,199, 185 gpm)).
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 | Generac T20-S | Champion 2 in Semi-Trash Pump 100742 |
|---|---|---|
| Overall rating | 3.3/5 | 3.1/5 |
| Value 30% | 36 $6.48 per gpm ($1,199, 185 gpm) | 73 $2.82 per gpm ($445, 158 gpm) |
| Flow 15% | 71 185 gpm maximum | 48 158 gpm maximum |
| Head 10% | 63 98 ft maximum head | 53 92 ft maximum head |
| Solids 15% | 60 passes solids up to 1 in | 20 passes solids up to 0.5 in |
| Warranty 30% | 50 3-year warranty for home use | 25 2-year warranty for home use |
Specifications
| Generac T20-S | Champion 2 in Semi-Trash Pump 100742 | |
|---|---|---|
| Pumping | ||
| Type | Trash | Semi-trash |
| Ports | 2 in | 2 in |
| Maximum flow | 185 gpm | 158 gpm |
| Maximum head | 98 ft | 92 ft |
| Suction lift | 26 ft | 26 ft |
| Largest solids | 1 in | 0.5 in |
| Engine and build | ||
| Engine | Generac G-Force, 211 cc | Champion OHV, 212 cc |
| Fuel tank | 3 gal | 3 gal |
| Runtime on a tank | 5 hr | - |
| Weight | 109.1 lb | 79 lb |
| Warranty | 3 years | 2 years |