1300 GeneralAire 1A-25B Complete 3/8" NPT Fuel Oil Filter – 10 GPH
🛠️ Product Overview
1300 GeneralAire 1A-25B Complete 3/8" NPT Fuel Oil Filter – 10 GPH
The GeneralAire 1A-25B (1300) fuel oil filter assembly provides reliable, long-term protection for oil burners, boilers, and furnaces. Built with epoxy-coated galvanized steel inside and out, it resists corrosion while maintaining clean fuel flow.
Equipped with a wool felt filter media and BioGasket seal, this unit efficiently removes sludge and particulates from standard or biofuel blends up to B100. The 4EVERLoc bottom bolt design ensures secure sealing and easy maintenance.
Replacement filter element: GeneralAire 2003 (1A-30BG) — the same element included in this complete assembly.
⚙️ Technical Specifications
| Specification | Description |
|---|
| Model Number |
1A-25B (1300) |
| Connection Size |
3/8" NPT |
| Maximum Working Pressure |
40 PSI |
| Maximum Firing Rate |
10 GPH |
| Maximum Flow Rate |
40 GPH |
| Filter Media |
Wool Felt |
| Material |
Epoxy-Coated Galvanized Steel |
| Biofuel Compatibility |
Up to B100 |
| Melting Point |
2150°F (1175°C) |
| Replacement Filter Element |
GeneralAire 2003 (1A-30BG) |
🧠 Key Features
-
Compatible with Biofuel blends up to B100
-
4EVERLoc bottom bolt design for leak-free performance
-
Durable epoxy-coated bowl resists corrosion inside and out
-
Wool felt media ensures effective filtration and smooth burner operation
-
Includes filter element (1A-30BG / 2003) inside
-
Designed for easy annual maintenance and long service life
⚠️ Common Symptoms of a Clogged or Failing Filter
If your oil system is experiencing issues, these signs may indicate a clogged or saturated filter element:
| Symptom | Possible Cause |
|---|
| Burner fails to ignite or locks out |
Restricted fuel flow through clogged filter |
| Uneven flame or poor combustion |
Contaminated fuel or partially blocked media |
| Reduced heating efficiency |
Dirty filter restricting oil pressure |
| Frequent burner cycling |
Intermittent fuel delivery from air or sludge buildup |
| Visible sludge in fuel bowl |
Indicates the element is saturated and needs replacement |
👉 Tip: Replace your filter element (GeneralAire 2003 / 1A-30BG) annually or sooner if these symptoms appear.
🛍️ Shopping Tips
-
Verify 3/8" NPT thread size for compatibility.
-
Replace the filter element annually for peak performance.
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Ideal for oil-fired boilers, furnaces, and burners using No. 2 heating oil or biofuel blends.
-
Always bleed air from the system after replacing the filter.
-
Keep a spare 2003 / 1A-30BG element on hand for maintenance convenience.
❓ Frequently Asked Questions (FAQ)
Q1: What’s the difference between the GeneralAire 1A-25B and 1A-30BG?
A: The 1A-25B is the complete filter assembly, including housing and element. The 1A-30BG (2003) is the replacement element only.
Q2: Can I use this filter with biofuel?
A: Yes — it’s rated for biofuel blends up to B100, making it perfect for modern heating systems.
Q3: How often should I replace the filter element?
A: Once per heating season or sooner if you notice reduced flow, ignition problems, or visible sludge.
Q4: What pressure and flow rates does it handle?
A: Up to 40 PSI, with a maximum firing rate of 10 GPH and flow rate of 40 GPH.
