Lennox 10P38 Gas Valve

The Lennox 10P38 Gas Valve is a high-capacity, 24V standing pilot gas valve designed for heavy-duty residential and commercial heating applications. This combination gas control is 100% identical to the Honeywell V800A1088, making it a drop-in replacement for standard-opening, single-stage gas furnace systems. Engineered with a straight-through body pattern and multi-tapped 1/2-inch side outlets, it handles a 335,000 BTU capacity at 1-inch pressure drop, ensuring consistent fuel delivery across high-demand appliances.

For the veteran technician, this valve is prized for its Lite-Rite lighting sequence (Off-Pilot-On) and integrated safety shutoff mechanism that activates instantly upon pilot flame failure. The 3/4" x 3/4" NPT inlet and outlet configuration, combined with included reducer bushings and a 36-inch Q340 thermocouple, provides maximum field flexibility. All pressure regulator adjustments and 1/8-inch NPT pressure taps are top-accessible, simplifying manifold pressure calibration during commissioning. This unit is built for natural gas but includes a field-convertible LP conversion kit to meet specific site requirements.

• High-Flow Performance: Handles up to 335,000 BTU/hr, making it suitable for large-scale furnaces and boilers.
• Universal Compatibility: Direct replacement for Lennox 10P38 and Honeywell V800A1088 models.
• Field-Ready Inclusions: Ships with a 30mV thermocouple, 1/2" and 3/8" bushings, and a liquid propane conversion kit.
• Installation Versatility: Can be mounted from 0 to 90 degrees in any direction from the upright position.
• Technician-Focused Design: Features a pilot flow adjustment screw and standard 1/4" male quick-connect terminals for rapid wiring.

Common Questions

Is the 10P38 compatible with millivolt-only systems?
No, this is a 24VAC operated valve. While it uses a 30mV thermocouple for the safety pilot circuit, the main operator requires a 24V power source from the transformer.

How do I convert this valve for use with Liquid Propane (LP)?
The unit includes a natural-to-LP conversion kit. You must replace the regulator spring and the pilot orifice following the manufacturer’s specifications to ensure safe combustion.

Will this replace a 1/2-inch inlet gas valve?
Yes, the 3/4-inch NPT ports can be bushed down using the two 3/4" x 1/2" producer bushings included in the box to fit 1/2-inch piping runs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.