12112 Beckett Firomatic B300F 3/4" NPT(F) x 3/4" NPT(F) Inline Fusible Valve
📝 Product Overview
The Beckett 12112 Firomatic B300F Inline Fusible Valve is a high-quality fire safety valve designed for 3/4" NPT female oil lines. Its robust brass construction with Viton® equivalent seals ensures reliable operation and long service life. The valve is specifically designed to cut off the flow of oil from the tank in the event of a fire, reducing potential damage.
This valve replaces old Firomatic part numbers: 9120-300-0, 91203000, and B-300-F. It is UL/ULC 842 listed and required by code in residential oil heating installations according to NFPA 31.
✅ Key Features
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✅ 3/4" NPT(F) x 3/4" NPT(F) inline fusible valve
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✅ Fire safety shut-off reduces fire damage by stopping oil flow
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✅ High-quality brass design with standard handwheel closure at 165°F
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✅ Viton® equivalent washers and O-rings resist high temperatures and chemical exposure
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✅ UL/ULC 842 listed for compliance in the U.S. and Canada
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✅ Required by NFPA 31 and CSA B139-15 codes for residential installations
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✅ Embossed flow direction and unique part number identification for easy installation
📊 Specifications
| Feature | Details |
|---|
| Part Number |
12112P |
| Brand |
Beckett |
| Type |
Inline Fusible Valve |
| Size |
3/4" NPT(F) x 3/4" NPT(F) |
| Material |
Brass |
| Seal Material |
Viton® Equivalent |
| Applications |
Residential oil heating installations |
| Safety Listings |
UL/ULC 842 |
| Replaces |
Firomatic 9120-300-0, 91203000, B-300-F |
⚙️ Applications
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Residential oil heating systems requiring inline fusible safety valves
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Replacement for worn or non-functioning B300F or old Firomatic valves
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Installation in inline oil lines where tank-mounted valves are not possible
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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: What types of fuel 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 where tank-mounted fusible valves are not possible.
🛒 Shopping Tips
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✅ Check your pipe size: Ensure compatibility with 3/4" NPT female connections
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✅ Inspect existing valve: Replace if leaking, damaged, or non-functional
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✅ Compliance: Confirm that your installation meets UL/ULC 842 and NFPA 31 codes
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✅ Flow direction: Align according to embossed arrow for proper function
