Combu 40140 Primary Oil Filter – 100 Micron, 1" NPT

Model Number: 70101-100
Part Number: 40140
Power Flame Part #: 985390
Replacement Element: Combu 41100 / Power Flame 985414 (Model 70100-100, 100 Micron)

The Combu 40140 Primary Oil Filter is a high-performance, industrial-grade fuel oil filter designed for residential, commercial, industrial, and waste oil systems. With a 100-micron element, durable die-cast aluminum housing, and a leak-proof O-ring design, it ensures clean fuel flow and reliable burner operation. Equivalent to Power Flame 985390 and compatible with Lanair 9807 systems.

✅ Key Features

• ✅ 100-Micron Element — replaceable and effective at removing contaminants

• ✅ 1" NPT Female Connection — easy, standard installation

• ✅ Leak-Proof Captive O-Ring — prevents air leaks between cup and cover

• ✅ Durable Die-Cast Aluminum Housing — corrosion and impact resistant

• ✅ Integrated Vent & Drain Ports — simplifies maintenance and priming

• ✅ Bottom Element Gasket Assembly — ensures proper suction and no vacuum loss

• ✅ UL Listed for Kerosene, No. 2 Fuel Oil, and Heavy Oils (#4, #5, #6)

• ✅ Direct Replacement for Power Flame 985390 / Lanair 9807

• ✅ Uses Replacement Element: Combu 41100 / Power Flame 985414 (100 Micron)

📊 Specifications

🔁 Cross Reference Table

⚠️ Common Symptoms Indicating Filter Replacement

• Reduced flow or low suction

• Clogged or fouled burner nozzles

• Flame instability or irregular burner performance

• Oil leakage around filter housing

• Vacuum loss at the oil pump

❓ Frequently Asked Questions (FAQ)

Q: What micron rating does this filter use?
A: The Combu 40140 uses a 100-micron element, designed for primary filtration in fuel oil and waste-oil systems.

Q: Is the filter element replaceable?
A: Yes. Replace it with Combu 41100 / Power Flame 985414 (Model 70100-100) when servicing or when the element becomes contaminated or worn.

Q: What fuels is this filter approved for?
A: It is UL listed for Kerosene, No. 2 Fuel Oil, and Heavy Oils (#4, #5, #6), as well as many waste-oil applications.

Q: How often should the element be serviced or replaced?
A: Service frequency depends on fuel quality, but most systems require inspection at every burner service. Replace the element when it shows buildup or reduced flow.

Q: Can this filter help reduce burner nozzle clogging?
A: Yes. Proper filtration helps prevent debris from entering the pump or nozzle, improving burner performance and reducing service calls.

Q: Is the housing reusable?
A: Yes — only the element and any worn gaskets or O-rings need to be replaced during maintenance.

🛒 Shopping Tips

• Confirm the required 100-micron rating for your system.

• Replace the element regularly to protect pumps and nozzles.

• Inspect the O-ring and cover at every service interval.

• Use UL-approved fuels for safe operation.

📝 Notes & Other Important Replacement Parts

• Replacement Element: Combu 41100 / Power Flame 985414 (Model 70100-100, 100 Micron)

• Drain & Vent Plug: Combu 42390 / Power Flame 985424

• Center Bolt O-Ring: Combu 42090 / Power Flame 985423

• Filter Cap Only: Combu 42449 / Power Flame 985427

• Gasket / O-Ring Kit: Combu 42331 / Power Flame 980260 (for 70101 Models)

• Cover O-Ring: Combu 42030 / Power Flame 985417

• Upper Element Gasket: Combu 42341 / Power Flame 985421 (Included on 41090 Elements)

• Filter Bowl Only: Combu 42450 / Power Flame 985426

Note: The filter housing is reusable — replace the element and any worn gaskets or O-rings to maintain peak performance.

🔍 Comparison: Combu 40140 vs Combu 40130