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 rates 3.7 among fixed speed water pressure booster pumps; the GWANZI K90S600L rates 3.4 among variable speed ones. The GWANZI K90S600L costs $260.01 less ($399.99 vs $660).
GWANZI K90S600L
#10 in Variable speedFull review
An inline inverter booster with a stainless shell for tight spaces. The cheaper H600 PRO from the same maker outpumps it.
Amazon $399.99$399.99
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.
Scores side by side
These two sit in different drive classes (fixed speed and variable speed), and each is scored against the reference points for its own class, so a rating says how well each does among its own drive peers. How we rank explains each factor.
| Factor weight | Simer 4075SS-01 Booster Pump | GWANZI K90S600L |
|---|---|---|
| Overall rating | 3.7/5 | 3.4/5 |
| Value 30% | 39 $27.50 per gpm ($660, 24 gpm) | 59 $18.18 per gpm ($399.99, 22 gpm) |
| Flow 15% | 73 24 gpm maximum | 64 22 gpm maximum |
| 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) | 50 noise rating not published (neutral score used) |
| Warranty 20% | 100 3-year warranty | 0 1-year warranty |
Specifications
| Simer 4075SS-01 Booster Pump | GWANZI K90S600L | |
|---|---|---|
| Pumping | ||
| Drive | Fixed speed | Variable speed |
| Maximum flow | 24 gpm | 22 gpm |
| Maximum head | 92 ft (40 psi) | 150 ft (65 psi) |
| Highest inlet pressure | 50 psi | - |
| Motor | 3/4 HP | 1 HP |
| Input power | - | 800 W |
| Ports | 1 in | 1 in |
| Protection and build | ||
| Built-in tank | No | - |
| Dry-run protection | Yes | Yes |
| Overheat protection | Yes | Yes |
| Voltage | 120 V | 120 V |
| Weight | - | 12 lb |
| Warranty | 3 years | 1 year |