Seaflo 56A Variable Speed 5.0 GPM
#1 in 4 GPM and upFull review
The best overall pick: a variable-speed 5 GPM pump that keeps the shower steady while other taps open, at well under the price of other variable-speed pumps.
Amazon $159.99$159.99
The Seaflo 56A Variable Speed 5.0 GPM and the Seaflo 55 Series 5.5 GPM 60 psi are evenly matched, rated 4.2 and 4.1. The Seaflo 56A Variable Speed 5.0 GPM leads on efficiency, features and pressure. The Seaflo 55 Series 5.5 GPM 60 psi wins on value and flow. The Seaflo 55 Series 5.5 GPM 60 psi costs $49.13 less ($110.86 vs $159.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Seaflo 55 Series 5.5 GPM 60 psi
#2 in 4 GPM and upFull review
A lot of flow and pressure for the money, for big rigs and boats with several fixtures. Check that the wiring can carry its 17 A draw.
Amazon $110.86$110.86
Which should you buy?
- Choose the Seaflo 56A Variable Speed 5.0 GPM for efficiency (0.50 GPM per amp (10 A max) vs 0.32 GPM per amp (17 A max)), features (variable speed, internal bypass, runs dry without damage vs internal bypass, runs dry without damage, strainer included) and pressure (70 psi shut-off vs 60 psi shut-off).
- Choose the Seaflo 55 Series 5.5 GPM 60 psi for value ($20.16 per GPM ($110.86, 5.5 GPM) vs $32 per GPM ($159.99, 5 GPM)) and flow (5.5 GPM rated open flow vs 5 GPM rated open flow).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 4 GPM and up RV water pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Seaflo 56A Variable Speed 5.0 GPM | Seaflo 55 Series 5.5 GPM 60 psi |
|---|---|---|
| Overall rating | 4.2/5 | 4.1/5 |
| Value 25% | 51 $32 per GPM ($159.99, 5 GPM) | 81 $20.16 per GPM ($110.86, 5.5 GPM) |
| Flow 20% | 75 5 GPM rated open flow | 88 5.5 GPM rated open flow |
| Pressure 15% | 100 70 psi shut-off | 86 60 psi shut-off |
| Efficiency 10% | 71 0.50 GPM per amp (10 A max) | 21 0.32 GPM per amp (17 A max) |
| Features 15% | 75 variable speed, internal bypass, runs dry without damage | 50 internal bypass, runs dry without damage, strainer included |
| Warranty 15% | 100 4-year warranty | 100 4-year warranty |
Specifications
| Seaflo 56A Variable Speed 5.0 GPM | Seaflo 55 Series 5.5 GPM 60 psi | |
|---|---|---|
| Performance | ||
| Rated open flow | 5 GPM | 5.5 GPM |
| Shut-off pressure | 70 psi | 60 psi |
| Max current draw | 10 A | 17 A |
| Price per GPM | $32 | $20.16 |
| Self-priming lift | 6 ft | 9 ft |
| Features | ||
| Control | Variable speed | Pressure switch |
| Diaphragm chambers | 5 | 5 |
| Internal bypass | Yes | Yes |
| Runs dry | Yes | Yes |
| Strainer included | - | Yes |
| Build | ||
| Warranty | 4 years | 4 years |