Rinnai Demand Duo 15/78 Pump Replacement Kit – Genuine OEM Part #104000303
- Authorized Online Dealer
- Free Shipping (exclusions may apply)
- We Beat The Lowest Price
- Fast 4–7 Day Delivery
- Manufacturer Warranty Included
- Questions? Call Our Experts: +1 (800) 484-0224
Rinnai Demand Duo 15/78 Pump Replacement Kit – Genuine OEM Part #104000303 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Your order processing time is 1 to 2 days. Please note that the cut-off time for order placement is 6 p.m. Orders received after this time will be processed on the following business day.
Your order will arrive within 4 to 7 days on average (free shipping over $200). Shipping for orders under $200 incurs a flat fee of $15. We currently offer shipping only within the continental United States (island deliveries may incur additional costs); international shipping is not available.
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As soon as your order is received on our end, we process it!
Rinnai Demand Duo 15/78 Pump Replacement Kit – Genuine OEM Part #10...
• Authorized Online Dealer
• Free Shipping + No Sales Tax (exclusions may apply)
• We Beat The Lowest Price
• Fast 4-7 Day Delivery
• Manufacturer Warranty Included
• Questions? Call Our Experts: +1 (800) 484-0224
Payment & Security
Payment methods
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Description
Description
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.
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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.
Let customers speak for us
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Peaceful water sound and super easy to maintain.
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This massive waterfall made our pool feel like a resort. The roar of that cascade is hypnotizing and the finish looks incredibly lifelike. We chose brown rock and it blends perfectly. Installation needed 3 people, but totally worth it.
Does exactly what it’s supposed to do.
Looks incredible in the backyard. Setup wasn’t hard
This grill is a beast! Super high quality.
We sold our wood unit for this, and haven’t looked back. Easy pilots, no mess, looks great
Works well. Sent in a timely manner. Cheapest online too!
Installation was extremely easy. Came with all the equipment needed!
We wanted something tropical, this fit perfectly!
