Simer 4075SS-01 Booster Pump
#1 in Fixed speedFull review
A simple inline booster for a city supply that is a little weak, from a long established US pump brand. Check stock before counting on it.
Amazon $660$660
The Simer 4075SS-01 Booster Pump is the better water pressure booster pump overall, rated 3.7 to 3.1. The Simer 4075SS-01 Booster Pump leads on warranty. The Grundfos SCALA1 3-45 115V wins on pressure. The Simer 4075SS-01 Booster Pump costs $161.64 less ($660 vs $821.64).
Grundfos SCALA1 3-45 115V
#11 in Fixed speedFull review
A tidy all-in-one booster for a low pressure supply or a storage tank where steady constant pressure is not essential. Most buyers spending this much should step up to the SCALA2.
Amazon $821.64$821.64
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 Simer 4075SS-01 Booster Pump for warranty (3-year warranty vs 2-year warranty).
- Choose the Grundfos SCALA1 3-45 115V for pressure (150 ft maximum head (about 65 psi) vs 92 ft maximum head (about 40 psi)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every fixed speed water pressure booster pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Simer 4075SS-01 Booster Pump | Grundfos SCALA1 3-45 115V |
|---|---|---|
| Overall rating | 3.7/5 | 3.1/5 |
| Value 30% | 39 $27.50 per gpm ($660, 24 gpm) | 7 $52 per gpm ($821.64, 15.8 gpm rated; maximum not published) |
| Flow 15% | 73 24 gpm maximum | 35 15.8 gpm rated; maximum not published |
| Pressure 15% | 27 92 ft maximum head (about 40 psi) | 75 150 ft maximum head (about 65 psi) |
| Protection 10% | 100 dry-run and overheat protection | 100 dry-run and overheat protection |
| Noise 10% | 50 noise rating not published (neutral score used) | 60 55 dBA |
| Warranty 20% | 100 3-year warranty | 50 2-year warranty |
Specifications
| Simer 4075SS-01 Booster Pump | Grundfos SCALA1 3-45 115V | |
|---|---|---|
| Pumping | ||
| Drive | Fixed speed | Fixed speed |
| Maximum flow | 24 gpm | - |
| Maximum head | 92 ft (40 psi) | 150 ft (65 psi) |
| Highest inlet pressure | 50 psi | 43.5 psi |
| Motor | 3/4 HP | 0.8 HP |
| Input power | - | 950 W |
| Ports | 1 in | 1 in |
| Protection and build | ||
| Built-in tank | No | No |
| Dry-run protection | Yes | Yes |
| Overheat protection | Yes | Yes |
| Outdoor rated | - | Yes |
| Voltage | 120 V | 120 V |
| Noise | - | 55 dBA |
| Weight | - | 26.4 lb |
| Warranty | 3 years | 2 years |