The Grundfos SCALA1 3-45 115V is the better water pressure booster pump overall, rated 3.1 to 3.0. The Grundfos SCALA1 3-45 115V leads on pressure. The Davey BT14-30 Torrium2 wins on warranty. The Grundfos SCALA1 3-45 115V costs $329.36 less ($821.64 vs $1,151).
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 $821.64For a house of one or two bathrooms on a weak city supply that wants a stainless, serviceable pump on plain 120 V.
Amazon $1,151Prices 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.
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 | Grundfos SCALA1 3-45 115V | Davey BT14-30 Torrium2 |
|---|---|---|
| Overall rating | 3.1/5 | 3.0/5 |
| Value 30% | 7 $52 per gpm ($821.64, 15.8 gpm rated; maximum not published) | 0 $82.21 per gpm ($1,151, 14 gpm) |
| Flow 15% | 35 15.8 gpm rated; maximum not published | 27 14 gpm maximum |
| Pressure 15% | 75 150 ft maximum head (about 65 psi) | 23 88 ft maximum head (about 38 psi) |
| Protection 10% | 100 dry-run and overheat protection | 100 dry-run and overheat protection |
| Noise 10% | 60 55 dBA | 50 noise rating not published (neutral score used) |
| Warranty 20% | 50 2-year warranty | 100 3-year warranty |
| Grundfos SCALA1 3-45 115V | Davey BT14-30 Torrium2 | |
|---|---|---|
| Pumping | ||
| Drive | Fixed speed | Fixed speed |
| Maximum flow | - | 14 gpm |
| Maximum head | 150 ft (65 psi) | 88 ft (38 psi) |
| Highest inlet pressure | 43.5 psi | - |
| Motor | 0.8 HP | 1 HP |
| Input power | 950 W | 920 W |
| Ports | 1 in | 1.2 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 | 26.5 lb |
| Warranty | 2 years | 3 years |
