Name: Shurflo 4048 High Flow 4.0 GPM
Brand: Shurflo
Price: 248.99 USD

Shurflo’s high-flow RV pump for rigs that run more than one fixture. Pumps with the same 4 GPM and higher pressure cost less.

Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

Cons

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.

Value $62.25 per GPM ($248.99, 4 GPM)8
Flow 4 GPM rated open flow50
Pressure 55 psi shut-off71
Efficiency 0.40 GPM per amp (10 A max)43
Features internal bypass, runs dry without damage, thermal protection, strainer included65
Warranty warranty not published, scored as none0

Specifications

A high-flow marine pump that is easy on the batteries for its 5 GPM. It is the most expensive pump here.

$359.09

5 GPM55 psi7 A

A marine-grade 4 GPM pump for boats and larger RVs with several fixtures. It costs more than pumps with similar flow and pressure.

$236.33

4 GPM55 psi10 A

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.

$185.09

4 GPM41 psi