Seaflo 33 Series 3.0 GPM 45 psi
#2 in Under 4 GPMFull review
The cheapest way to a 3 GPM pump with a 4-year warranty. Buy it for a travel trailer when a firm 55 psi shower isn’t a priority.
Amazon $52.99$52.99
The Seaflo 33 Series 3.0 GPM 45 psi is the better RV water pump overall, rated 3.6 to 2.9. The Seaflo 33 Series 3.0 GPM 45 psi leads on value and warranty. The Flojet Triplex R3526144D 2.9 GPM wins on pressure. The Seaflo 33 Series 3.0 GPM 45 psi costs $50.60 less ($52.99 vs $103.59).
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.
Flojet Triplex R3526144D 2.9 GPM
#4 in Under 4 GPMFull review
A long-running OEM triplex pump for trailers and campers. It costs more than importer pumps with a longer warranty.
Amazon $103.59$103.59
Which should you buy?
- Choose the Seaflo 33 Series 3.0 GPM 45 psi for value ($17.66 per GPM ($52.99, 3 GPM) vs $35.72 per GPM ($103.59, 2.9 GPM)) and warranty (4-year warranty vs 2-year warranty).
- Choose the Flojet Triplex R3526144D 2.9 GPM for pressure (50 psi shut-off vs 45 psi shut-off).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 4 GPM RV water pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Seaflo 33 Series 3.0 GPM 45 psi | Flojet Triplex R3526144D 2.9 GPM |
|---|---|---|
| Overall rating | 3.6/5 | 2.9/5 |
| Value 25% | 89 $17.66 per GPM ($52.99, 3 GPM) | 44 $35.72 per GPM ($103.59, 2.9 GPM) |
| Flow 20% | 25 3 GPM rated open flow | 22 2.9 GPM rated open flow |
| Pressure 15% | 43 45 psi shut-off | 57 50 psi shut-off |
| Efficiency 10% | 50 maximum current draw not published (neutral score used) | 50 maximum current draw not published (neutral score used) |
| Features 15% | 45 runs dry without damage, thermal protection, strainer included | 40 internal bypass, runs dry without damage |
| Warranty 15% | 100 4-year warranty | 33 2-year warranty |
Specifications
| Seaflo 33 Series 3.0 GPM 45 psi | Flojet Triplex R3526144D 2.9 GPM | |
|---|---|---|
| Performance | ||
| Rated open flow | 3 GPM | 2.9 GPM |
| Shut-off pressure | 45 psi | 50 psi |
| Price per GPM | $17.66 | $35.72 |
| Self-priming lift | 6 ft | 9 ft |
| Features | ||
| Control | Pressure switch | Pressure switch |
| Diaphragm chambers | 3 | 3 |
| Internal bypass | - | Yes |
| Runs dry | Yes | Yes |
| Thermal protection | Yes | - |
| Strainer included | Yes | - |
| Build | ||
| Weight | - | 3.5 lb |
| Warranty | 4 years | 2 years |