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
The Seaflo 55 Series 5.5 GPM 60 psi is the better RV water pump overall, rated 4.1 to 3.6. The Seaflo 55 Series 5.5 GPM 60 psi leads on features, flow and pressure. The Wassermann 4WDP5 5.0 GPM 55 psi wins on value. The Wassermann 4WDP5 5.0 GPM 55 psi costs $47.70 less ($63.16 vs $110.86).
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.
Wassermann 4WDP5 5.0 GPM 55 psi
#3 in 4 GPM and upFull review
The cheapest high-flow pump here by a wide margin. Buy it as a budget upgrade if you can live without a published warranty.
Amazon $63.16$63.16
Which should you buy?
- Choose the Seaflo 55 Series 5.5 GPM 60 psi for features (internal bypass, runs dry without damage, strainer included vs runs dry without damage, strainer included), flow (5.5 GPM rated open flow vs 5 GPM rated open flow) and pressure (60 psi shut-off vs 55 psi shut-off).
- Choose the Wassermann 4WDP5 5.0 GPM 55 psi for value ($12.63 per GPM ($63.16, 5 GPM) vs $20.16 per GPM ($110.86, 5.5 GPM)).
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 55 Series 5.5 GPM 60 psi | Wassermann 4WDP5 5.0 GPM 55 psi |
|---|---|---|
| Overall rating | 4.1/5 | 3.6/5 |
| Value 25% | 81 $20.16 per GPM ($110.86, 5.5 GPM) | 100 $12.63 per GPM ($63.16, 5 GPM) |
| Flow 20% | 88 5.5 GPM rated open flow | 75 5 GPM rated open flow |
| Pressure 15% | 86 60 psi shut-off | 71 55 psi shut-off |
| Efficiency 10% | 21 0.32 GPM per amp (17 A max) | 50 maximum current draw not published (neutral score used) |
| Features 15% | 50 internal bypass, runs dry without damage, strainer included | 30 runs dry without damage, strainer included |
| Warranty 15% | 100 4-year warranty | 0 warranty not published, scored as none |
Specifications
| Seaflo 55 Series 5.5 GPM 60 psi | Wassermann 4WDP5 5.0 GPM 55 psi | |
|---|---|---|
| Performance | ||
| Rated open flow | 5.5 GPM | 5 GPM |
| Shut-off pressure | 60 psi | 55 psi |
| Max current draw | 17 A | - |
| Price per GPM | $20.16 | $12.63 |
| Self-priming lift | 9 ft | - |
| Features | ||
| Control | Pressure switch | Pressure switch |
| Diaphragm chambers | 5 | - |
| Internal bypass | Yes | - |
| Runs dry | Yes | Yes |
| Strainer included | Yes | Yes |
| Build | ||
| Warranty | 4 years | - |