Description
The Weil McLain 383-500-777 is an OEM replacement Heat Exchanger Kit designed specifically for Weil McLain boilers in the 299, 310, and 399 MBH model series. This kit delivers a precise, factory-matched fit that restores your boiler’s thermal transfer efficiency and extends equipment service life.
Product Overview
The heat exchanger is the heart of any hydronic boiler system, responsible for transferring combustion heat into the water distribution loop. When the original heat exchanger shows signs of corrosion, scaling, or physical damage, replacing it with a genuine Weil McLain kit ensures your system returns to peak operating performance without the cost of full boiler replacement.
Key Features
- OEM replacement kit engineered for Weil McLain 299, 310, and 399 MBH boiler models
- Factory-matched design ensures proper fit and sealing within the boiler cabinet
- Restores optimal heat transfer efficiency to the hydronic system
- Supports long-term boiler reliability and reduces downtime
- Genuine Weil McLain part — SKU 383-500-777
- Designed for straightforward field installation by qualified HVAC technicians
Compatible Models
- Weil McLain 299 MBH series boilers
- Weil McLain 310 MBH series boilers
- Weil McLain 399 MBH series boilers
Why Choose a Genuine OEM Heat Exchanger Kit?
Aftermarket substitutes may not meet the exact dimensional tolerances or material specifications required by Weil McLain boilers. Using a genuine OEM replacement kit like the 383-500-777 ensures compatibility with existing controls, venting, and pressure ratings — protecting your warranty and safeguarding system performance.
Installation Notes
Installation should be performed by a licensed HVAC or plumbing professional in accordance with all applicable local codes and the Weil McLain installation and service manual for the applicable boiler model. Always shut down the boiler, relieve system pressure, and allow the unit to cool completely before beginning any heat exchanger service work.
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