Outdoor Outlet Box with 20 AMP GFCI Receptacle - Weatherproof

In this review we look at the DEWENWILS Outdoor Outlet Box, a weatherproof 20 AMP GFCI receptacle enclosure intended for backyard outlets, outdoor lighting, pool equipment and other exterior circuits. The bottom line: this unit is best for homeowners and DIY installers who want a sturdy, lockable metal box with built-in GFCI protection and clear power indication, offering reliable safety in wet conditions without fuss during installation.

Key Features

• ETL Certified & Reliable GFCI Protection: The included UL listed 20 AMP WR and TR GFCI outlet automatically cuts power when a ground fault is detected, protecting outdoor circuits and connected equipment.
• Weatherproof & Rustproof Construction: The enclosure is made from galvanized steel and certified to NEMA-3R, so it stands up to rain, dust and the corrosive effects of outdoor exposure.
• Spacious Interior: A roomy interior provides ample space for screw installation and neat wiring, making it easier to route cables and secure connections.
• Power Indicator Light: A built-in indicator beside the outlet makes it quick to verify whether the receptacle is powered without opening the box.
• Flexible Knockouts and Covers: Pre-drilled sides and included covers for 1/2', 3/4' and 1' knockouts let installers choose wiring angles without extra drilling.
• Anti-theft & Lockable: A side lock hole allows the box to be locked to reduce theft or accidental disconnection of outdoor equipment.

Who It's For

This outlet box fits homeowners, landscapers and pool owners who need a durable outdoor receptacle solution that integrates GFCI safety and weather resistance. It is particularly useful for pool pump and filter circuits, garden lighting, and outlets near patios or driveways where exposure to moisture and dust is a concern.

Those who need plastic enclosures, very compact cover plates, or specialized commercial panels should look elsewhere; this product is optimized for heavy-duty, all-metal durability and straightforward residential installs rather than low-profile or industrial control-room applications.

Pros & Cons

Pros

• Solid all-metal construction delivers long-term resistance to rust and outdoor wear.
• Built-in 20 AMP WR/TR GFCI outlet provides immediate ground-fault protection without a separate device.
• Pre-drilled knockouts, multiple knockout covers and a roomy interior make wiring and installation easier.
• Lockable design adds theft prevention and improves safety for unattended outdoor equipment.

Cons

• Some buyers report mixed impressions of plug functionality and value for money, so expectations on outlet feel may vary.
• The metal housing makes it heavier and less low-profile than plastic alternatives, which may not suit all aesthetics.

Specifications

Brand	DEWENWILS
GFCI Rating	UL listed 20 AMP WR/TR
Enclosure Material	Galvanized steel, all-metal construction
Weather Rating	NEMA-3R (rainproof, dustproof)
Knockout Options	Includes covers for 1/2', 3/4' and 1'
Special Features	Power indicator light; side lock hole for locking

Our Verdict

The DEWENWILS outdoor outlet box delivers dependable GFCI protection in a tough, rust-resistant metal enclosure that simplifies wiring and secures outdoor devices. It is a good value for homeowners who prioritize safety and durability for pool pumps, lighting and patio outlets, though those seeking a lighter or low-profile cover may prefer alternate styles.

Frequently Asked Questions

Is this unit suitable for pool pump and filter installations?
Yes. Customers report successful use with pool pumps and filters thanks to the included 20 AMP WR/TR GFCI and the weatherproof NEMA-3R enclosure.

Can I lock the outlet box to prevent tampering?
Yes. The enclosure has a side lock hole design that lets you secure the cover to deter theft or accidental disconnection.

Are extra holes required for wiring?
No. The box is pre-drilled on multiple sides and ships with knockout covers for 1/2', 3/4' and 1' so additional drilling is usually unnecessary.