Everflo EF5500-BOX 5.5 GPM 12V Diaphragm Pump - Reliable Sprayer Pump

In this review the Everflo EF5500-BOX 12V diaphragm pump is judged as a practical, midrange pump for spot and broadcast spraying that prioritizes flow and ease of installation. The single biggest reason to consider this pump is its on-demand 5.5 GPM flow with a 60 psi capability combined with a self-priming design, which means it delivers the steady pressure needed for small-acreage spraying and many fluid transfer tasks. It is best for users who need a replacement 12V pump with corrosion-resistant internals and a standard mounting pattern that fits most sprayer tanks.

Key Features

• 5.5 GPM Flow: Provides ample flow for spot and broadcast spraying so coverage is faster and spray pattern stays consistent over small fields.
• Self-Priming to 8 ft: The pump can prime from deep tanks up to eight ft, which helps when the tank outlet sits below the pump.
• Durable Materials: Fiberglass-reinforced polypropylene manifold with Viton valves and a Santoprene diaphragm resist corrosion for pesticide and disinfectant use.
• Automatic Pressure Switch: A built-in pressure switch slowly cycles the pump to reduce motor and switch wear and conserve battery power when flow is not needed.
• Standard Mounting Pattern: Fits most sprayer tanks and serves as a direct replacement on a variety of makes and models, simplifying installation.
• 12V Compatibility: Designed for common 12 volt systems, making it suitable for tractor and ATVs with a separate wire harness available.

Who It's For

The Everflo EF5500-BOX is aimed at landscapers, farmers with small acreage, and homeowners using tractor supply sprayers who need a reliable replacement pump with good pressure and straightforward hookup. It suits anyone who values quick priming and corrosion-resistant internals for agricultural chemicals, sanitizers, or disinfectants.

Those who require long-term industrial duty or extended continuous runtime should look elsewhere; some users reported shorter lifespan in heavy daily use and intermittent durability issues. Also note the 12 volt wire harness is sold separately, so buyers who want a plug-and-play kit should plan for that extra part.

Pros & Cons

Pros

• Delivers consistent pressure and strong flow that handles spot and broadcast spraying effectively.
• Corrosion-resistant Viton valves and Santoprene diaphragm extend compatibility with chemical applications.
• Self-priming up to eight ft and a standard mount pattern make swaps and installations straightforward.

Cons

• Some customers report durability problems under heavy or prolonged use, with pumps failing earlier than expected.
• 12V wire harness is not included, so additional purchase is required for a complete installation.

Specifications

Brand	Everflo
Model	EF5500-BOX
Voltage	12V
Flow Rate	5.5 GPM
Maximum Pressure	60 psi
Priming Capability	Self-priming up to 8 ft
Materials	Fiberglass-reinforced polypropylene manifold, Viton valves, Santoprene diaphragm

Our Verdict

The Everflo EF5500-BOX is a good-value replacement 12V diaphragm pump for homeowners and small-acreage operators who need reliable 5.5 GPM flow and chemical compatibility. It stands out for easy installation and corrosion-resistant internals, but buyers should be aware of reported durability limits under heavy continuous use and the need to buy a separate 12 volt wire harness.

Frequently Asked Questions

Is this pump suitable for agricultural chemicals?
Yes; the Viton valves and Santoprene diaphragm are corrosion resistant and approved for many agricultural spraying and disinfectant applications.

Does the pump include electrical connections?
No; the 12V wire harness is sold separately, so plan to purchase the harness for a complete installation.

How easy is it to replace an existing sprayer pump?
The pump uses a standard mounting pattern that fits most sprayer tanks, making it a straightforward replacement for a variety of makes and models.