Hearth NKY.3BR
Hearth Universal Gas Valve Key
Model: NKY.3BR
Introduction
This instruction manual provides essential information for the safe and effective use of your Hearth Universal Gas Valve Key. This key is designed for operating gas valves in fireplaces and other gas appliances that utilize 1/4" and 5/16" Dante gas valve stems. Please read this manual thoroughly before use and retain it for future reference.
Product Features
- 3-Inch Long Stem: Provides adequate reach for various valve placements.
- Dual Compatibility: Designed to fit both 1/4" and 5/16" Dante gas valve stems.
- Durable Construction: Made from brass for longevity and aesthetic appeal.
- Fireplace Gas Valve Key: Specifically designed for fireplace gas valve operation.

Image 1: The Hearth Universal Gas Valve Key. This image displays the key's brass finish, the length of its stem, and the design of its handle, highlighting its compatibility with gas valve stems.
Setup and Installation
- Identify Valve Stem Size: Before using the key, confirm that your gas valve stem is either 1/4" or 5/16" in size. This key is designed to fit these specific dimensions.
- Insert Key: Gently insert the square end of the gas valve key onto the corresponding square stem of your gas valve. Ensure the key is fully seated on the stem to prevent slipping during operation.
- Check Fit: The key should fit snugly without excessive play. If the key feels loose or does not seat properly, do not force it. Verify the valve stem size again.
Safety Note: Always ensure the gas supply is off before attempting to connect or disconnect any gas appliance components, unless specifically instructed otherwise by a qualified technician. If you are unsure about your gas valve type or operation, consult a professional.
Operating Instructions
The Hearth Universal Gas Valve Key is used to manually open and close the gas supply to your appliance, typically a fireplace. Follow these steps for safe operation:
- Ensure Proper Seating: As described in the Setup section, ensure the key is fully and securely seated on the gas valve stem.
- To Open Gas Supply: Slowly turn the key counter-clockwise. A quarter turn (90 degrees) is typically sufficient to fully open the valve. Do not overtighten.
- To Close Gas Supply: Slowly turn the key clockwise until it stops. A quarter turn (90 degrees) is typically sufficient to fully close the valve. Do not overtighten.
- Remove Key: Once the gas valve is in the desired position (open or closed), gently remove the key from the valve stem. It is recommended to remove the key when not in use to prevent accidental tampering.
Important: Never leave the gas valve key inserted into the valve when the appliance is operating or unattended. Always follow the specific operating instructions for your gas appliance in conjunction with using this key.
Maintenance
The Hearth Universal Gas Valve Key requires minimal maintenance to ensure its longevity and proper function.
- Cleaning: Wipe the key with a soft, dry cloth to remove dust or debris. Avoid using abrasive cleaners or solvents, as these may damage the brass finish.
- Storage: Store the key in a dry place away from extreme temperatures and corrosive substances. Keeping it in a designated spot will also prevent misplacement.
- Inspection: Periodically inspect the key for any signs of wear, bending, or damage. If the key appears damaged, discontinue use and replace it.
Troubleshooting
If you encounter issues while using your gas valve key, consider the following:
- Key Does Not Fit:
- Ensure your gas valve stem is either 1/4" or 5/16" square. This key is not compatible with other sizes or shapes.
- Check for any obstructions or debris in the valve stem opening.
- Valve is Difficult to Turn:
- Do not force the key. Excessive force can damage the key or the valve.
- The gas valve itself may be stiff or partially seized. In such cases, it is recommended to contact a qualified gas technician for inspection and repair of the valve.
- Gas Leak Suspected:
- If you smell gas, hear a hissing sound, or suspect a gas leak, immediately turn off the main gas supply, evacuate the area, and contact your gas provider or emergency services. Do not attempt to operate the valve or any electrical switches.
Specifications
| Manufacturer | Hearth |
| Model Number | NKY.3BR |
| Part Number | NKY.3BR |
| Material | Brass |
| Item Weight | 1.76 ounces |
| Product Dimensions | 7 x 4 x 1 inches |
| Compatibility | 1/4" and 5/16" Dante gas valve stems |
Warranty Information
Specific warranty details for the Hearth Universal Gas Valve Key are not provided in this manual. For information regarding product warranty, please refer to the product packaging or contact Hearth customer support directly. Keep your proof of purchase for any warranty claims.
Customer Support
If you have questions or require assistance with your Hearth Universal Gas Valve Key, please contact Hearth customer support. Contact information can typically be found on the product packaging or the manufacturer's official website. When contacting support, please have your product model number (NKY.3BR) available.
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