Lochinvar L100287143 Natural Gas Venturi 200 Series

Product Description

The LOCHINVAR L100287143 is a natural gas venturi designed for use in Lochinvar water heater systems beginning with serial number 1738 in the 200 series. The venturi is a critical combustion air and gas mixing component that controls the fuel-air ratio entering the burner assembly. Proper venturi function directly affects combustion efficiency, flame stability, and safe burner operation. This part is sourced as an OEM-specification replacement and is intended for installation by licensed plumbing or HVAC technicians familiar with gas-fired water heater service.

This venturi applies to Lochinvar natural gas water heaters in the 200 series, specifically units beginning at serial number 1738. It is suited for residential or light commercial water heating applications where the original venturi has been damaged, worn, or requires replacement during a burner assembly service. Technicians performing annual maintenance or combustion troubleshooting on qualifying units will find this part appropriate for restoring proper air-gas mixing performance.

Key Features

• OEM-specification natural gas venturi for Lochinvar 200 series water heaters
• Engineered to maintain correct fuel-air mixture ratio at the burner
• Applies to units starting at serial number 1738
• Direct replacement design supports accurate fit without field modification
• Compatible with natural gas fuel supply configurations

Compatibility

Designed for Lochinvar natural gas water heaters in the 200 series beginning with serial number 1738, as indicated by the OEM part designation.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician with experience servicing gas-fired water heating equipment. Shut off the gas supply and disconnect electrical power to the unit before beginning any burner or combustion component service. Verify the replacement venturi is fully seated and sealed in the burner assembly before restoring gas flow. Follow all applicable local codes and the manufacturer service documentation when reassembling combustion components.

Technical Specifications

• Fuel Type: Natural Gas
• Application: Water Heater Venturi
• Series: 200 Series
• Serial Number Start: 1738

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: L100287143