Jandy | R0454200 | Rear Header Assembly with Hardware & Gaskets – Pro Series LXi/Legacy Heaters

The Jandy R0454200 Rear Header Assembly is a genuine OEM replacement kit designed for Pro Series and Legacy gas pool heaters (including LXi, LRZE and LRZM models). It includes the molded header, mounting hardware, and gaskets necessary to restore the heater’s water-flow manifold and sealing surfaces. 

Key Features

• OEM Jandy/Zodiac header assembly (part number R0454200) for compatible heater models. 

• Compatible with LXi Low-NOx heaters and Legacy LRZE/LRZM models. 

• Includes hardware and gaskets for direct “drop-in” replacement. 

• Constructed from molded polymer or engineered material designed for pool heater plumbing environments. 

• Restores proper header flow porting and sealing, preventing leaks, bypass, or internal corrosion-related failures. 

Product Overview
The Jandy R0454200 Rear Header Assembly is a critical component of the heater’s water circuit, forming the interface between the heater’s heat exchanger, water return plumbing, and various sensor ports. Over time in pool heater systems, headers can crack, corrode, deteriorate or develop leaks due to thermal cycling, chemical exposure, and mechanical stress. When a header fails or begins leaking, performance drops, safety risks rise, and maintenance downtime becomes significant.

By installing this genuine OEM assembly, technicians and service providers are able to restore factory-specified sealing, flow geometry and structural integrity to the heater’s water manifold. Because this kit includes hardware and gaskets, it streamlines the repair process and reduces the risk of missing components or mismatched materials. For e-commerce cataloging, this part should be positioned under “Heater Plumbing & Manifold Parts – LXi/Legacy Series” with emphasis on its fitment across multiple related models and the inclusion of hardware/gaskets to support full replacement.