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Lennox

OEM Lennox Natural Gas Valve Boiler 2-5 Section — 74P70

SKU: LNX-74P70 Brand: Lennox
$169.95 $229.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 74P70 gas valve is engineered for natural gas use only on 2-5 section, gas-fired induced draft hot water boilers. It controls the flow of natural gas to the burner sections, opening on a call for heat and closing to shut off fuel the moment a safety or draft condition is compromised. Its capacity is matched to multi-section boiler firing rates for safe, efficient combustion.

Signs the valve is failing include a boiler that will not fire, burners that ignite and then drop out, delayed ignition accompanied by a gas smell, insufficient heat output, or repeated ignition lockouts. Humming, chattering, or any gas leak means the valve should be replaced immediately.

Choosing the OEM Lennox 74P70 ensures the correct natural-gas calibration, capacity, and pressure rating your induced draft boiler was designed to use. Aftermarket or improperly rated valves can under- or over-fire the sections, create hazards, and void your warranty. This factory-original component guarantees an exact fit and safe, reliable boiler operation.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Gas Valve fit my Lennox OEM Lennox Natural Gas Valve Boiler 2-5 Section — 74P70?
Yes. This is the factory-specified OEM gas valve for the Lennox OEM Lennox Natural Gas Valve Boiler 2-5 Section — 74P70. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the gas valve on my Lennox OEM Lennox Natural Gas Valve Boiler 2-5 Section — 74P70?
Requires licensed HVAC technician. Gas valve work involves gas lines that must meet local building codes. Improper installation risks dangerous gas leaks. Buy the part yourself to save 40–60% on markup, then have your technician install it.
What symptoms mean I need a new gas valve?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this gas valve compatible with Bryant or Payne too?
Many Lennox parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Lennox gas valve?
Always use OEM. Gas valves must match exact pressure ratings, port configurations, and safety certifications. Non-OEM gas valves can create safety hazards and may violate building codes.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
HVAC Parts Specialist — Online