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
The Garber R Fuel Filter is a direct replacement part for maintaining clean fuel delivery to the Aqua-Hot & Hydro-Hot hydronic heating systems....
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These new style pumps are used on all new aqua-hot and hydro-hot systems. This can be used as a circulation pump, stir pump & engine pre-hea...
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125 PSI pressure relief valve (PLX-111-125) for Aqua-Hot hydronic heating systems. Protects the closed-loop coolant system from dangerous over-pres...
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Fuel supply line tube assembly for Aqua-Hot diesel hydronic heating systems. Delivers diesel fuel from the tank to the burner assembly at the corre...
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Refractometer (MSX-907-162) for testing glycol antifreeze concentration in Aqua-Hot and Hydro-Hot hydronic heating systems. Quickly measures the fr...
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Fuel return line tube assembly (FLE-421-852) for Aqua-Hot diesel hydronic heating systems. Routes unused fuel from the burner back to the fuel tank...
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Brass check valve (PLX-2A1-300) for Aqua-Hot hydronic heating systems. Prevents reverse coolant flow in the heating loop, ensuring one-directional ...
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13 PSI radiator cap with lever release (PLX-102-229-L) for Aqua-Hot hydronic heating system expansion tanks. Maintains system pressure for efficien...
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Fleetguard fuel/water separator filter (RACOR FLX-R12-TRA) for Aqua-Hot diesel hydronic heating systems. Removes water and contaminants from diesel...
View full detailsBrass 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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Buehler C21 circulation pump (PLX-100-900) for Aqua-Hot hydronic heating systems. This pump circulates heated coolant through the system's zones, c...
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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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Nylatch plunger (HDX-100-200) for Aqua-Hot heating systems. This latch component secures access panels and service covers on Aqua-Hot cabin heaters...
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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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Aqua-Hot 100 cab heater for hydronic heating systems in RVs, coaches, and specialty vehicles. This compact heat exchanger with integrated fan provi...
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Green 5/16-inch hose clamp for securing rubber hoses in Aqua-Hot and Hydro-Hot hydronic heating systems. Color-coded green for easy identification ...
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Pump mounting bracket (PLX-100-836) for the Buehler C21 circulation pump used in Aqua-Hot hydronic heating systems. Secures the pump in the correct...
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"Make a splash with perfectly tempered water - get your Aqua-Hot Parts 145F Tempering Valve PLX-09P-100 today!"
Black nylon reducer fitting stepping down from 3/4-inch to 5/8-inch for Aqua-Hot hydronic heating plumbing. Connects larger main supply lines to sm...
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Black nylon coupler fitting (PLX-000-825) for joining 3/4-inch tubing in Aqua-Hot hydronic heating systems. Provides a secure, leak-free inline con...
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Filler neck gasket (PLE-GAS-010) for Aqua-Hot hydronic heating system expansion tanks. Creates a leak-free seal between the filler neck and the exp...
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Clear 5/8-inch overflow hose, 4-foot length, for Aqua-Hot and Hydro-Hot hydronic heating systems. Routes excess coolant from the expansion tank ove...
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For use in Aqua-Hot Models 5/16 tubing HH 08e, 08m, 09e, 09m, 450-DE1, DM1
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Aqua-Hot 200 cabin heater for hydronic heating systems in RVs, coaches, and specialty vehicles. This larger capacity heat exchanger with built-in f...
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Diesel photo-eye kit for the Aqua-Hot 250D hydronic heating system. The photo-eye (cad cell) detects the presence of a flame in the combustion cham...
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Replacement faceplate (SME-200-501) for the electronic control assembly on Aqua-Hot hydronic heating systems. This panel provides the user interfac...
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Annual service kit (Pink) for Aqua-Hot hydronic heating systems. Contains the essential replacement parts for yearly preventive maintenance includi...
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For use with models 375 & 525 ATTN: Gasket only used on models that have Beckett burners
Ignition module gasket kit for Aqua-Hot hydronic heating systems. Contains the gaskets and seals required when servicing or replacing the ignition ...
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Adjustable tempering valve (PLX-4A8-180) with a range of 120°F to 160°F for Aqua-Hot hydronic heating systems. Mixes hot and cold water to deliver ...
View full detailsESBE 120°F tempering valve with 1/2-inch male NPT connections for Aqua-Hot hydronic heating systems. Blends hot and cold water to deliver a fixed 1...
View full details5/8-inch red oxygen barrier PEX tubing, 300-foot roll, for Aqua-Hot and Hydro-Hot hydronic heating installations. The oxygen barrier layer prevents...
View full detailsHVCC S1 pump for Aqua-Hot hydronic heating systems. This circulation pump moves heated coolant through the system's zones, cabin heaters, and domes...
View full detailsBrass ball valve assembly with 1/2-inch female NPT connections and fitting for Aqua-Hot AHE-03 and AHE-04 hydronic heating systems. Provides a reli...
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