Masterbuilt 9904190030 Gravity Series Fire Brick Kit

What Problem This Part Solves

Without proper insulation, heat can rapidly escape the firebox, causing inconsistent temperatures, inefficient pellet use, and accelerated wear on internal components. The fire brick kit improves heat retention, stabilizes temperatures, and protects firebox materials from direct flame and thermal shock.

Key Features

• Fire-brick kit engineered for Masterbuilt Gravity Series smokers

• High-temperature refractory bricks for superior heat retention

• Helps maintain consistent internal cooking temperatures

• Protects firebox walls from direct flame and burnout

• Easy fit replacement kit

Compatibility / Fits Models

Fits Masterbuilt Gravity Series pellet smokers
Fits most Gravity Series models—confirm your model before ordering.

Fits Models
MB20040122, MB20040220, MB20040221, MB20041020, MB20041220

Installation / Use Instructions (1–3 steps)

1. Turn Off & Cool: Ensure smoker is completely cool and disconnected from power.

2. Remove Old/Loose Bricks: Take out any existing or damaged fire bricks.

3. Install New Kit: Place the supplied fire bricks along the firebox walls as specified in your smoker’s manual until fully seated.

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FAQ Section (5 questions & answers)

1. Does this fit my grill?
Yes — this fire brick kit fits Masterbuilt Gravity Series pellet smokers. Confirm your model before ordering.

2. What are these fire bricks made of?
They are high-temperature refractory bricks designed to withstand intense heat and improve heat retention.

3. How long should this kit last?
With normal use and proper installation, fire bricks should last many seasons; however, repeated thermal shock can affect longevity.

4. How do I install the fire brick kit?
After ensuring the grill is cool, remove old or loose bricks and install the new fire bricks along the firebox walls as instructed in your smoker’s manual.

5. Why choose this kit over others?
This is a genuine Masterbuilt fire brick kit engineered specifically for Gravity Series smokers to ensure proper fit, heat retention, and long-term performance compared to generic blocks.