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
3 GPM45 psi
2.9/5
A long-running OEM triplex pump for trailers and campers. It costs more than importer pumps with a longer warranty.
- 2.9 GPMFlow
- 50 psiShut-off
- Pressure switchControl
Check price at Amazon$103.59
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Built-in bypass smooths flow without an accumulator tank
- Primes up to 9 ft
- Light at 3.5 lb
Cons
- 2.9 GPM is the low side of standard
- Maximum current draw is not published
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its flow. How we rank explains each one.
Specifications
| Model number | R3526144D |
|---|---|
| Performance | |
| Rated open flow | 2.9 GPM |
| Shut-off pressure | 50 psi |
| Price per GPM | $35.72 |
| Self-priming lift | 9 ft |
| Features | |
| Control | Pressure switch |
| Diaphragm chambers | 3 |
| Internal bypass | Yes |
| Runs dry | Yes |
| Build | |
| Weight | 3.5 lb |
| Warranty | 2 years |
Alternatives in this flow
PowerMax 3.0 GPM 55 psi RV Pump
#3 in Under 4 GPMFull review
A cheaper stand-in for the Shurflo 4008 with the same flow, pressure and bypass. Seaflo’s 42 Series is cheaper still with a longer warranty.
Amazon $74$74
3 GPM55 psi
Johnson Pump Aqua Jet WPS 3.5
#5 in Under 4 GPMFull review
A marine pressure pump with a 3-year warranty, for boats where 41 psi is plenty. RV owners after a firmer shower should look at 55 psi pumps.
Amazon $137.49$137.49
3.5 GPM41 psi
Compare
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