Lochinvar MSC3701 Boiler Burner Sight Glass Kit

Lochinvar MSC3701 Boiler Burner Sight Glass Kit is an essential replacement part for accurate burner inspection and safe boiler operation. Designed for PB/PF-250 to 1000 Power-Fin models, this sight glass kit helps you monitor flame status and maintain optimal performance in your heating and hot water supply boiler. Built to the original Lochinvar specifications, it delivers reliable visibility and durable construction for ongoing maintenance.

• Fits PB/PF-250 to 1000 Power-Fin boilers
• Provides a clear, durable sight glass for burner inspection
• Replacement part for heating and hot water supply boilers
• Easy, tool-friendly installation with standard fittings
• Built to match OEM specs for long service life
• Supports routine maintenance and quick troubleshooting

Keep your Lochinvar boiler running smoothly with this genuine sight glass kit, designed to simplify checks and uphold safety standards in residential or commercial heating systems.