Jandy | R0590100 | Pro Series 3-Port Manifold – Heater Replacement for JXi 200/260/400

The Jandy R0590100 Pro Series 3-Port Manifold is a genuine OEM replacement water-flow distribution component engineered for Jandy JXi 200, JXi 260, and JXi 400 heater models. It ensures proper routing of water through the heater’s heat-exchanger and supports optimal performance and longevity.

Key Features

• Genuine Jandy OEM manifold assembly – part R0590100. 

• Designed for JXi 200, 260 and 400 models (3-port configuration). 

• Accepts plumbed water flow in/out connections for efficient heater operation.

• Precision-molded construction to maintain proper hydraulic flow and prevent internal bypass.

• Durable materials suited for pool-heater environment: high temperature, corrosion-resistant.

• “No backplate” version — backplate may need to be ordered separately if required. 

• Direct-fit replacement to factory manifold for simplified maintenance or repair.

Product Overview
In the hydraulic circuit of the Jandy JXi series pool heater, the R0590100 manifold serves as the central water-distribution block, integrating the incoming pool return line, internal heater flow path, and outgoing pool supply. Over time, the original manifold may develop cracks, leaks, or internal flow imbalance, compromising heater efficiency and potentially causing safety issues.

By installing the R0590100 Pro Series 3-Port Manifold, service technicians restore the correct OEM water-routing architecture, ensuring consistent flow through the heat exchanger, proper heat transfer, and reliable operation of the JXi heater models (200, 260, 400). Its direct-swap design and high-quality materials help minimize downtime and maintain professional-grade system performance.