Davey BT30-30 Torrium2
#2 in Fixed speedFull review
For a large home or a house plus irrigation that needs a lot of flow at a moderate boost. Plan for a 240 V outlet.
Amazon $1,420$1,420
3.4/5
For houses fed from a cistern or break tank that need a lot of head. City water users with some inlet pressure should look at a variable speed pump instead.
- 180 ft (78 psi)Head
- Fixed speedDrive
- 1.1 HPMotor
Check price at Amazon$1,122.89
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- The largest SCALA1: 180 ft of head lifts water from a ground tank to a top floor
- Dry-run, anti-cycling and maximum runtime protection guard against a lost supply or a leak
- Starts and stops on demand with no separate pressure switch to plumb in
- Rated for outdoor installation
Cons
- Accepts only 29 psi at the inlet, so it is for tanks and very weak supplies, not city mains top-ups
- Fixed speed, so pressure swings as demand changes
- Needs a 240 V NEMA 6-15 outlet
The Grundfos SCALA1 family
Every Grundfos SCALA1 model we rank, smallest first. Ratings compare each against its own drive.
| Model | Flow | Rating | Price |
|---|---|---|---|
| Grundfos SCALA1 3-45 115V | - | 3.1/5 | $821.64 |
| Grundfos SCALA1 5-55 230V (this one) | - | 3.4/5 | $1,122.89 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its drive. How we rank explains each one.
Specifications
| Model number | 99631739 |
|---|---|
| Pumping | |
| Drive | Fixed speed |
| Maximum head | 180 ft (78 psi) |
| Highest inlet pressure | 29 psi |
| Motor | 1.1 HP |
| Input power | 1,250 W |
| Ports | 1 in |
| Protection and build | |
| Built-in tank | No |
| Dry-run protection | Yes |
| Overheat protection | Yes |
| Outdoor rated | Yes |
| Voltage | 240 V |
| Noise | 55 dBA |
| Weight | 30.8 lb |
| Warranty | 2 years |
Alternatives in this drive
Davey BT20-40 Torrium2
#3 in Fixed speedFull review
For a large or multi-storey house with a very weak supply. Plan for a 240 V outlet.
Amazon $1,287$1,287
VEVOR 5 GPM 110V Pressure Pump
#5 in Fixed speedFull review
A low cost plug-in pump for a cabin, garden or tank supply where one fixture runs at a time.
Amazon $82.90$82.90
Compare
Compare the Grundfos SCALA1 5-55 230V with any other water pressure booster pump →
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