12150 Beckett Firomatic B205F 1/2" Flare x 1/2" Flare Inline Fusible Valve (12850)
📝 Product Overview
The Beckett 12150 Firomatic B205F Inline Fusible Valve is a 1/2" ODF x 1/2" ODF flare valve designed to enhance fire safety for residential oil heating systems. Constructed with high-quality brass and Viton® equivalent seals, this valve shuts off the flow of oil during a fire, protecting property and complying with safety regulations.
This valve replaces old Firomatic part numbers: 9120-205-0, 91202050, and B-205-F. The new part number 12850 is now the direct replacement. It is UL/ULC 842 listed and meets NFPA 31 standards.
✅ Key Features
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✅ 1/2" ODF x 1/2" ODF flare nuts for easy installation
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✅ Fusible valve approved for kerosene and No. 2 fuel oil
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✅ High-quality brass construction for long-term durability
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✅ Handwheel closure at 165°F ambient temperature
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✅ Viton® equivalent O-ring and washer system resists heat and chemical exposure
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✅ Embossed flow direction and part number for proper installation
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✅ UL/ULC 842 listed and NFPA 31 compliant
📊 Specifications
| Feature | Details |
|---|
| Part Number |
12150 (New Part Number: 12850) |
| Brand |
Beckett |
| Type |
Inline Fusible Valve |
| Size |
1/2" ODF x 1/2" ODF Flare Nuts |
| Material |
Brass |
| Seal Material |
Viton® Equivalent |
| Applications |
Residential oil heating systems |
| Safety Listings |
UL/ULC 842 |
| Replaces |
Firomatic 9120-205-0, 91202050, B-205-F |
⚙️ Applications
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Residential oil heating systems needing inline fusible valves
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Replacement for worn or damaged B205F or old Firomatic valves
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Installation in inline oil lines where fusible tank valves cannot be installed
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Provides automatic fire protection for fuel-oil systems
⚠️ Common Symptoms (When Replacement is Needed)
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Oil continues to flow despite high-temperature conditions or fire
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Valve leaks or fails to shut off
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Damaged O-rings or washers compromising safety
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Rust, corrosion, or mechanical wear affecting valve operation
❓ Frequently Asked Questions
Q1: Which fuels are compatible with this valve?
➡️ Suitable for No. 2 fuel oil, kerosene, and up to 20% biodiesel blend.
Q2: Is this valve required by code?
➡️ Yes, it complies with NFPA 31 and CSA B139-15 for residential oil heating installations.
Q3: Can this valve replace a fusible tank valve?
➡️ Yes, it is ideal for inline installation when tank-mounted fusible valves cannot be installed.
🛒 Shopping Tips
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✅ Check flare sizes: Ensure your oil line matches 1/2" ODF flare connections
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✅ Inspect existing valve: Replace if leaking, damaged, or non-functional
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✅ Compliance: Verify that your installation meets UL/ULC 842 and NFPA 31 standards
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✅ Flow direction: Install according to the embossed arrow for proper operation
