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.
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Combustion chamber tube gasket for Models 375, 400 and 525 and low emissions models AHE-450 AND 600D
Brass barb fitting, 3/4-inch barb x 1/2-inch male NPT, for Aqua-Hot and Hydro-Hot hydronic heating systems. Connects coolant hoses to threaded port...
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Annual service kit (Green) for Aqua-Hot hydronic heating systems. Contains the essential replacement parts needed for yearly preventive maintenance...
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Replacement label for the 3 Qt. expansion tank used in Aqua-Hot and Hydro-Hot hydronic heating systems. Restores factory identification markings in...
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Complete fuel fitting kit with JIC male connector, nut, and ring for Aqua-Hot diesel hydronic heating systems. Provides a proper leak-free connecti...
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Replacement blower wheel fan motor (HDX-162-511) for Aqua-Hot heating systems. Powers the blower fan that circulates warm air through the cabin hea...
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Preformed 3/4-inch 90-degree molded hose, 18-1/2 inches in length, for Aqua-Hot and Hydro-Hot hydronic heating systems. This pre-shaped elbow hose ...
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Tempering valve repair kit (PLX-4A8-18R) for Aqua-Hot hydronic heating systems. Contains the internal components needed to rebuild and restore prop...
View full details5/8-inch PEX tubing for Aqua-Hot and Hydro-Hot hydronic heating system plumbing. Used for coolant distribution lines between the heating unit and z...
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Cozy plenum assembly for Aqua-Hot hydronic heating systems. The cozy plenum is a compact heat exchanger with integrated fan that mounts in cabinets...
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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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