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Aqua-Hot Parts | OEM Replacement Components & Repair Kits

Aqua-Hot Parts | OEM Replacement Components & Repair Kits

Genuine Aqua-Hot Parts for Reliable Hydronic Heating

Keep your Aqua-Hot system performing like new with our full selection of OEM Aqua-Hot parts and accessories. Each component is engineered to fit perfectly, ensuring consistent heat, efficient operation, and long-term reliability.

Whether you’re performing annual maintenance, troubleshooting a heating issue, or rebuilding your entire system, you’ll find every part you need — from filters and nozzles to pumps, thermostats, sensors, and circuit boards.

✅ Genuine OEM Aqua-Hot replacement parts
🔧 Compatible with Aqua-Hot & Hydro-Hot systems
🔥 Maintain peak heating and hot water performance
🧰 Ideal for RVs, coaches, and hydronic service centers

Use the filters to quickly locate the right part for your specific model. Each product page includes part numbers, compatibility notes, and installation details to help you complete your repair confidently.

For annual maintenance, explore our Aqua-Hot Service Kits and Cost-Saving Bundles — curated for convenience and long-term system protection.

5-quart expansion tank assembly with a durable design and connection fittings.
Save $3.11
$103.75
$100.64

5 Qt. Expansion Tank Assembly PLE-622-902

5-quart expansion tank assembly (PLE-622-902) for Aqua-Hot hydronic heating systems. The larger capacity accommodates greater coolant volume in sys...

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$103.75
$100.64
Save $3.11
Metal engine pump supply pipe with curved design and mounting flange
$0.00

Engine Pump Supply Pipe

Engine pump supply pipe for Aqua-Hot hydronic heating systems. This formed pipe connects the engine coolant supply to the Aqua-Hot unit, enabling e...

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$0.00
A 3-quart overflow bottle with a decal and a 5/8 inch barb fitting.
$97.62

3 Qt. Overflow Bottle w/ Decal, 5/8 inch Barb fitting

3-quart overflow bottle with factory decal and 5/8-inch barb fitting for Aqua-Hot hydronic heating systems. Captures and recovers coolant overflow ...

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$97.62
3 Qt. expansion tank with internal fluid lever sensor and 5/8 inch barbs.
$109.99

3 Qt. Expansion Tank w/ Internal Fluid Lever Sensor, 5/8 inch Barbs PLE-063-200

3-quart expansion tank with integrated internal fluid level sensor (PLE-063-200) for Aqua-Hot hydronic heating systems. Features 5/8-inch barb fitt...

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$109.99
Small filler neck with a sturdy design for secure fluid transfer in various applications.
$59.99

Small Filler Neck TNX-NEC-FLL

Small filler neck (TNX-NEC-FLL) for Aqua-Hot hydronic heating system expansion tanks. Provides the fill point for adding coolant to the system. Rep...

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$59.99
White label for a 5-quart expansion tank with clear black text.
$8.50

5 Qt. Expansion Tank Label

Replacement label for the 5 Qt. expansion tank used in Aqua-Hot hydronic heating systems. Restores factory identification markings including fill l...

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$8.50
$60.92

Brush (Set) March, 809 High Speed

Replacement brush set for March 809 high-speed circulation pumps used in Aqua-Hot and Hydro-Hot hydronic heating systems. Motor brushes wear over t...

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$60.92

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