Weil McLain 510-811-630 Conversion Kit

When you are tasked with a fuel transition for high-efficiency hydronic systems, the Weil McLain 510-811-630 provides the precise components required for a field conversion from LP (Propane) to Natural Gas. Specifically engineered for GV series boilers—most notably the GV-5 model—this kit allows for the recalibration of the combustion process to match the lower energy density and specific gravity of natural gas. As any veteran tech knows, the LP to NAT conversion requires more than just a setup change; it demands hardware that can safely accommodate the increased fuel volume needed for the same BTU output. This Conversion Kit maintains the integrity of the GV Boiler gas train by replacing the restrictive propane orifice with a factory-spec Natural Orifice Plate. By ensuring the correct air-to-fuel ratio, this 510-811-630 Propane to Natural kit prevents soot accumulation and erratic flame signals, ensuring the unit operates within the manufacturer's narrow combustion efficiency parameters while meeting local safety codes for gas-fired equipment.

Key Benefits

• Model-Specific Engineering: Validated specifically for Weil McLain GV-5 series boilers to ensure repeatable manifold pressure settings.
• Precision Metering: Includes a high-tolerance Natural Orifice Plate designed to achieve the 1,000 BTU/cu. ft. requirement of natural gas.
• Regulated Compliance: Comes with a permanent conversion label to satisfy jurisdictional inspection requirements and document the fuel change for future technicians.
• Combustion Stability: Eliminates the risk of "over-firing" or "under-firing" that often occurs with non-OEM or universal orifice modifications.

Common Questions

Do I need to change the gas valve when using the 510-811-630 kit?
No, for the GV-5 boiler, the existing gas valve is typically designed to handle both fuels. This kit modifies the flow via the orifice plate; however, you must still verify the inlet gas pressure (typically 4" to 13" W.C. for NAT) and confirm the valve settings per the technical manual.

Is a combustion analyzer required after installing this LP to Natural kit?
Absolutely. While the 510-811-630 provides the physical orifice, a qualified technician must use a combustion analyzer to verify CO2/O2 levels and ensure a clean burn post-installation.

Can this be used on a GV-4 or GV-6 model?
This specific part number is verified for the GV-5. Using the wrong kit creates a stoichiometric mismatch. Always reference the orifice stamping to ensure it matches your specific boiler model and BTU rating.

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.