🔥 Lochinvar Gas Valve Assembly – Model 100172018

Ensure your boiler operates safely, efficiently, and reliably with the Lochinvar Gas Valve Assembly (100172018). Designed as a direct replacement for VAL3405, this natural gas valve is engineered to meet the high standards of Lochinvar Copper-Fin and Copper-Fin II boilers. With precise gas flow control and robust Honeywell engineering, it provides consistent performance, reducing the risk of burner irregularities and system interruptions.

This valve is ideal for homeowners, HVAC technicians, and service professionals seeking a durable, dependable solution for natural gas-fired boilers. Its adjustable pressure range (1.2 – 3.2" WC) allows for fine-tuning to match your system requirements, while the 24V operation ensures compatibility with a wide range of Copper-Fin boiler models.

Whether you’re performing routine maintenance, replacing a worn-out valve, or upgrading for improved efficiency, the 100172018 valve delivers reliable ignition, precise gas metering, and long-lasting performance. Its compact design and standard 3/4" x 3/4" connections make installation straightforward for certified HVAC technicians.

✅ Key Features

• ✅ Direct Replacement for VAL3405 – fits perfectly without modification

• ✅ Compatible with Copper-Fin Boilers: CBN0497, CBN0647, and CBN0747 (NG)

• ✅ Honeywell VR8303M4863 Valve – proven reliability and performance

• ✅ 3/4" x 3/4" Gas Connections for easy installation

• ✅ Adjustable Pressure Range: 1.2 – 3.2" WC for precise gas control

• ✅ 24V, 50/60Hz Operation with total current 0.7 Amps

• ✅ Ensures safe, consistent gas flow and stable boiler operation

• ✅ Improves ignition reliability and reduces risk of burner malfunctions

📊 Specifications Table

⚠️ Common Symptoms – Know When to Replace

• ❌ Boiler won’t ignite or flames won’t hold

• ❌ Fluctuating or irregular burner performance

• ❌ Inconsistent gas pressure readings

• ❌ Repeated error codes for gas supply or valve issues

• ❌ Hissing, leaking, or unusual sounds near the gas valve

❓ Frequently Asked Questions (FAQ)

Q: Can this valve be used with propane?

• ❌ No, this valve is for natural gas only.

Q: Can I install it myself?

• ⚠️ Installation must be done by a certified technician for safety and proper operation.

Q: Will it fit my Copper-Fin II boiler?

• ✅ Yes, compatible with CBN0747 Copper-Fin II (NG) and other listed models.

Q: What is the pressure range adjustment?

• The valve allows fine-tuning between 1.2 – 3.2" WC to ensure optimal boiler operation.

🛒 Shopping Tips

• 🔍 Double-check your boiler model before ordering.

• ⚡ Turn off power and gas supply before installation.

• 🔧 Consider replacing worn gaskets or connectors for optimal performance.

• 💡 Keep a certified technician on hand for safe installation and calibration.