Kidde 21028511 KD57W-5BC Mariner REC 5 2 lb BC Marine Fire Extinguisher – 5-B:C with Strap Bracket

Kidde 21028511 KD57W-5BC Mariner REC 5 Marine Fire Extinguisher

The Kidde 21028511 Mariner REC 5 is a compact marine fire extinguisher designed for Class B flammable-liquid and Class C energized-electrical fire hazards. Kidde model KD57W-5BC contains approximately 2 lb of BC dry chemical agent and carries a 5-B:C UL rating.

Its narrow aluminum cylinder and included plastic strap bracket make the REC 5 particularly useful where mounting and storage space are limited. The pressure gauge provides an at-a-glance indication of extinguisher readiness, while aluminum and stainless-steel operating components help provide corrosion resistance for marine use.

Key Features & Benefits

• 5-B:C UL rating: Designed for Class B flammable-liquid and Class C energized-electrical fire hazards.
• 2 lb BC dry chemical agent: Compact firefighting capacity for marine and recreational applications.
• Compact 2.9-inch diameter: Slim cylinder profile helps accommodate tighter mounting locations.
• 8–12 ft. discharge range: Provides useful reach while maintaining a compact extinguisher size.
• Pressure gauge: Provides a quick visual indication of extinguisher pressure status.
• Aluminum cylinder: Lightweight construction suited to marine and recreational applications.
• Metal operating components: Aluminum and stainless-steel valve, handle and lever construction.
• U.S. Coast Guard approved: Approved for marine use with the supplied mounting bracket.
• Plastic strap bracket included: Secures the extinguisher while keeping it readily accessible.
• Disposable design: Replace the extinguisher after discharge rather than recharging it.
• 6-year limited warranty: Covered by Kidde's specified limited warranty for this model.

Kidde 21028511 Mariner REC 5 Specifications

Compact BC Protection for Marine Applications

The Mariner REC 5 carries a 5-B:C rating for two common marine fire hazards:

• Class B: Flammable liquids and gases, including common fuel-related hazards.
• Class C: Fires involving energized electrical equipment.

This extinguisher does not carry a Class A rating for ordinary combustibles such as wood, paper or cloth. Buyers who need ABC protection should select an appropriately rated Mariner ABC model.

Slim 2.9-Inch Cylinder for Tight Mounting Areas

One of the most useful characteristics of the 21028511 is its compact profile. At approximately 2.9 inches in diameter and 12.02 inches high, it is narrower than many conventional 2 lb marine extinguishers.

The extinguisher also provides an approximately 8–12 ft. discharge range, giving it useful reach despite its compact size.

Where Is the Mariner REC 5 Best Used?

• Recreational boats and watercraft
• Personal watercraft and compact marine applications
• Powerboats and fishing boats
• Locations with limited extinguisher mounting space
• Marine areas with flammable-liquid and electrical fire hazards

Is the Mariner REC 5 Right for Your Boat?

The 21028511 is particularly useful when you need a compact 5-B:C marine extinguisher with a narrow cylinder and included mounting bracket. Its BC rating addresses common fuel and energized-electrical hazards while keeping the extinguisher small and lightweight.

If ordinary combustible materials are also a significant concern, consider an ABC-rated Mariner model such as the MAR110 or MAR210.

Frequently Asked Questions

What is the Kidde model number for 21028511?

Kidde identifies the 21028511 as model KD57W-5BC. It is also marketed as the Mariner REC 5.

Is the Kidde Mariner REC 5 rechargeable?

No. Despite the REC 5 designation, Kidde documentation identifies this model as disposable / single-use. Replace it after discharge.

What types of fires can the 21028511 fight?

Its 5-B:C UL rating is intended for Class B flammable-liquid and Class C energized-electrical fires. It does not carry a Class A rating.

How much extinguishing agent does it contain?

The Mariner REC 5 contains approximately 2 lb of BC dry chemical extinguishing agent.

What is the discharge range?

Kidde specifies an approximately 8–12 ft. discharge range with an approximately 8–10 second discharge time.

Does the 21028511 include a mounting bracket?

Yes. A plastic strap mounting bracket is included.

Is it U.S. Coast Guard approved?

Yes. Kidde identifies the extinguisher as U.S. Coast Guard approved when used with its mounting bracket.