Rinnai Demand Duo 15/78 Pump Replacement Kit – Genuine OEM Part #104000303

Keep your Rinnai Demand Duo 15 or 78 system running at peak efficiency with the Rinnai Demand Duo 15/78 Pump Replacement Kit (Part #104000303). Designed by Rinnai for precision fit and performance, this OEM replacement kit ensures consistent water flow, optimal heating performance, and long-lasting reliability.

Ideal for professional installers and property maintenance teams, this kit is an authentic replacement part built to restore your system’s original functionality while maintaining Rinnai’s high quality and safety standards.

Key Features:

• Genuine OEM Replacement: Manufactured by Rinnai for guaranteed compatibility and long-term reliability.
• Seamless Fit: Specifically engineered for Rinnai Demand Duo 15 and 78 systems.
• Improved Efficiency: Restores optimal water circulation and heating performance.
• Durable Build: High-grade materials ensure resistance to heat and corrosion.
• Easy Installation: Designed for quick setup with minimal downtime.
• Warranty-Compatible: Using genuine parts helps maintain manufacturer warranty protection.
  

What’s Included

• 1 × Rinnai Demand Duo 15/78 Replacement Pump
• 1 × Mounting Hardware Set
• 1 × Installation Instruction Manual
  

Specifications:

Specification	Details
Brand	Rinnai
Model Compatibility	Demand Duo 15, Demand Duo 78
Part Number	104000303
Product Type	Pump Replacement Kit
Material	Heavy-duty corrosion-resistant components
Power Source	Electric (system-powered)
Installation Type	Direct fit, OEM replacement
Package Dimensions (Approx.)	12" L × 8" W × 6" H
Weight	4.5 lbs (approx.)

Care & Maintenance Instructions

• Ensure the system is powered off before performing installation or maintenance.
• Periodically inspect pump connections for leaks or corrosion.
• Clean and flush system annually to maintain efficient water flow.
• Use only Rinnai-certified parts to ensure performance and safety.
• Keep installation manual for reference and troubleshooting.