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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.

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
Metal propane exhaust tip end with a cylindrical shape and smooth finish
$14.72

Propane Exhaust Tip End SME-400-015

Propane exhaust tip end (SME-400-015) for Aqua-Hot hydronic heating systems equipped with propane burners. Directs exhaust gases safely outside the...

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$14.72
Cozy plenum assembly with insulated panels and metal frame for HVAC systems
$254.58

Cozy Plenum Assembly

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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$254.58
Stainless steel pressure gauge with a 2.5-inch dial and liquid-filled display up to 300 psi.
$51.98

Stainless Steel Pressure Gauge

Winters PFQ Series Stainless Steel 304 Single Scale Liquid Filled Pressure Gauge w/ Brass Internals 0-300psi, 2.5" Dial Display, +/-1.5% Accuracy...

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$51.98
Block of refractory insulation material with a rough, porous surface and light gray color
$73.85

Refractory Insulation

Refractory insulation for Aqua-Hot hydronic heating system combustion chambers. This high-temperature insulation lines the interior of the combusti...

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$73.85
3 quart expansion tank with a sensor kit, featuring a cylindrical shape and mounting brackets.
$115.48

3 Qt. Expansion Tank w/ Sensor Kit MSE-200-OFB

3-quart expansion tank with sensor kit (MSE-200-OFB) for Aqua-Hot and Hydro-Hot hydronic heating systems. Provides coolant expansion capacity and f...

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$115.48
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
Oxygen sensor socket with a hexagonal shape and a durable metal finish.
$17.83

Oxygen Sensor Socket AHPW648442

Oxygen sensor socket tool (AHPW648442) for servicing Aqua-Hot hydronic heating systems. This specialty socket is designed to remove and install oxy...

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$17.83
$0.00

Manifold Drain Assembly Kit

Manifold drain assembly kit for Aqua-Hot and Hydro-Hot hydronic heating systems. Provides a convenient drain point on the manifold for system flush...

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$0.00
$0.00

2 Zone Pump Manifold Pipe Assembly

2-zone pump manifold pipe assembly for Aqua-Hot hydronic heating systems. This pre-assembled manifold distributes heated coolant to two independent...

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$0.00
$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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