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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.

Bosch Assist Pump kit with various components for efficient fluid transfer.
$357.38

Kit, Bosch Assist Pump

Bosch assist pump kit for Aqua-Hot hydronic heating systems. The assist pump provides supplemental coolant circulation for systems with long plumbi...

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$357.38
Plastic threaded pipe plug Caplugs P-48 in black, fits 1/2 inch NPT thread size.
$1.25

Caplugs 99390176 Plastic Threaded Plug for Pipe Fittings. P-48, PE-HD, to Plug Thread Size 1/2 NPT",

Plastic threaded plug (P-48) for 1/2-inch NPT pipe fittings. Used to cap off unused ports in Aqua-Hot and Hydro-Hot hydronic heating systems during...

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$1.25
Plastic threaded plug for pipe fittings, size 1/4 NPT, made of PE-HD material.
$0.45

Caplugs 99390174 Plastic Threaded Plug for Pipe Fittings. P-28, PE-HD, to Plug Thread Size 1/4 NPT",

Plastic threaded plug (P-28) for 1/4-inch NPT pipe fittings. Used to cap off unused ports in Aqua-Hot and Hydro-Hot hydronic heating systems during...

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$0.45
Vented hydronic heater overflow cap with attached tether in black plastic design
$32.92

Vented Hydronic Heater Overflow Cap with Tether

Vented overflow cap with tether for Aqua-Hot and Hydro-Hot hydronic heating system expansion tanks. The vented design allows controlled pressure re...

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$32.92
Tan metal grille measuring 10 inches by 2 inches with a sleek design.
$4.79

Cozy Grille, 10 in. x 2 in TAN, METAL EXX-950-411

Tan metal cozy grille (10" x 2") (EXX-950-411) for Aqua-Hot hydronic heating systems. This low-profile metal grille is designed for flush-mount ins...

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$4.79
A rectangular grille measuring 3.5 inches by 8.5 inches in a cozy design.
$17.50

Cozy Grille 3.5 inches x 8.5 inches

Black plastic cozy grille (3.5" x 8.5") for Aqua-Hot hydronic heating systems. This compact grille is designed for smaller zone heating locations s...

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$17.50
Black plastic grille measuring 3.5 by 15 inches with a simple rectangular design
$21.62

Cozy Grille 3.5 inches x 15 inches Black Plastic

Black plastic cozy grille (3.5" x 15") for Aqua-Hot hydronic heating systems. Mounts over the cozy plenum heat exchanger outlet to distribute warm ...

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$21.62
Black plastic Cozy Grille measuring 3.5 by 21.5 inches with a slatted design
$23.68

Cozy Grille 3.5 inches x 21.5 inches black plastic

Black plastic cozy grille (3.5" x 21.5") for Aqua-Hot hydronic heating systems. This larger grille covers wider cozy plenum installations and distr...

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$23.68
$50.80

Water Heater Insulation Blanket Kit

Water heater insulation blanket kit for supplemental insulation on Aqua-Hot and Hydro-Hot hydronic heating systems. Wraps around the heating unit t...

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$50.80
Black plastic drive rivet with a 5mm hole for secure fastening.
$0.98

Uxcell 5mm Hole Retainer Clip, Plastic Drive Rivet, Black

5mm plastic push-in retainer clips (black) for securing panels, covers, and trim in Aqua-Hot hydronic heating installations. These drive rivets sna...

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$0.98
Black 12-inch cable tie with a smooth surface and a locking mechanism for secure bundling.
$0.63

12 in. Cable Tie

12-inch cable ties for securing wiring, hoses, and tubing in Aqua-Hot and Hydro-Hot hydronic heating installations. Use during system installation,...

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$0.63
$116.63

1-1/2"x48"x120" Micro Aire Duct Board Foil Backed

1-1/2 inch thick Micro Aire duct board (48" x 120") with foil backing for superior insulation in Aqua-Hot and Hydro-Hot heated air duct systems. Th...

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$116.63
$82.92

1"x48"x120" Micro Aire Duct Board Foil backed

1-inch thick Micro Aire duct board (48" x 120") with foil backing for use in Aqua-Hot and Hydro-Hot hydronic heating installations. This rigid fibe...

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$82.92
Blower wheel fan motor with metal housing and central mounting shaft visible.
$10.36

Blower Wheel Fan Motor HDX-162-511

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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$10.36
Three-quarter inch preformed hose bent at a 90-degree angle.
$25.00

80414 Hose 3/4 Preformed, 90 degrees

Preformed 3/4-inch 90-degree molded hose for Aqua-Hot and Hydro-Hot hydronic heating systems. Pre-shaped for specific routing applications where a ...

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$25.00
Preformed 3/4 inch hose bent at 90 degrees, 18 1/2 inches long
$25.00

80413 Hose 3/4 Preformed 90 degrees 18 1/2" Length

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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$25.00
Clear, flexible Tygothane polyurethane tubing, 5/16 inch diameter, 7/16 inch outer diameter.
$6.76

BULK Tygothane®, Unbraided Polyurethane Tubing 100ft, 5/16 inch D, 7/16 inch OD (SOLD BY FOOT)

Tygothane® unbraided polyurethane tubing, 5/16-inch ID x 7/16-inch OD, sold by the foot from a 100-foot spool. Used in Aqua-Hot and Hydro-Hot syste...

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$6.76
$3.10

Insert Modified Brass Fitting

Modified brass insert fitting for Aqua-Hot and Hydro-Hot hydronic heating systems. This specialty fitting is designed for specific plumbing connect...

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$3.10
Metal constant tension hose clamp with a 7/8 inch diameter and adjustable design.
$4.85

Constant Tension Hose Clamp, 7/8 inch CTB-24ST

7/8-inch constant tension hose clamp (CTB-24ST) for Aqua-Hot and Hydro-Hot hydronic heating systems. Self-adjusting spring design maintains consist...

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$4.85
Constant tension hose clamp with a 1/2 inch diameter and metal construction
$1.00

Constant Tension Hose Clamp 1/2 inch CTB-12

1/2-inch constant tension hose clamp (CTB-12) for Aqua-Hot and Hydro-Hot hydronic heating systems. Unlike standard worm gear clamps, constant tensi...

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$1.00
A 5/8 inch polytube bend support with a sturdy design for flexible tubing applications.
$11.30

5/8 IN Polytube Bend Support

Bend support for 5/8-inch polytube used in Aqua-Hot and Hydro-Hot hydronic heating systems. Prevents kinking and maintains proper flow when routing...

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$11.30
Straight 1/2 inch PEX fitting with smooth connectors for plumbing applications.
$10.00

Straight 1/2 inch Pex Fitting

Straight 1/2-inch PEX fitting for Aqua-Hot and Hydro-Hot hydronic heating systems. Creates a secure inline connection between 1/2-inch PEX tubing r...

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$10.00
Tempering valve repair kit with multiple brass and plastic components for plumbing maintenance
$393.59

Tempering Valve Repair Kit - AH PLX-4A8-18R

Tempering valve repair kit (PLX-4A8-18R) for Aqua-Hot hydronic heating systems. Contains the internal components needed to rebuild and restore prop...

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$393.59
A metal air assembly combination valve with multiple connection points and a compact design.
$19.58

Air Assembly Combination Valve

Air assembly combination valve for Aqua-Hot and Hydro-Hot hydronic heating systems. This multi-function valve combines air venting and pressure rel...

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$19.58
Metal tempering valve with temperature range markings from 120 to 160 degrees Fahrenheit
$198.33

120F-160F Tempering Valve

Adjustable tempering valve with a temperature range of 120°F to 160°F for Aqua-Hot and Hydro-Hot domestic hot water systems. Mixes hot and cold wat...

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$198.33
Metal radiator cap with bail and chain, featuring a sleek design for secure closure.
Save $3.76
$125.49
$121.73

Radiator Cap w/ Bail & Chain PLX-403-000

Radiator cap with bail handle and tethering chain (PLX-403-000) for Aqua-Hot hydronic heating system expansion tanks. The chain prevents the cap fr...

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$125.49
$121.73
Save $3.76
Black molded hose elbow with 90-degree bend, 3/4 inch diameter, and 10-inch length
$20.58

Molded Hose Elbow 90* 3/4 x 3/4 x 10 long, AH/HH

Molded 90-degree hose elbow, 3/4-inch x 3/4-inch, 10 inches long, for Aqua-Hot and Hydro-Hot hydronic heating systems. This pre-formed elbow elimin...

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$20.58
A metal worm gear clamp designed to fit 7/8 inch to 1-1/4 inch hoses.
$9.47

AH Lined Worm Gear Clamp, 7/8 inch to 1-1/4 inch

Lined worm gear clamp adjustable from 7/8-inch to 1-1/4 inch for Aqua-Hot and Hydro-Hot hydronic heating systems. The interior lining protects hose...

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$9.47
$9.31

Fitting Brass Elbow 90* Barb 1/4 x 1/4 (m) NP

Brass 90-degree elbow fitting with 1/4-inch barb x 1/4-inch male NPT for Aqua-Hot and Hydro-Hot hydronic heating systems. Used for connecting small...

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$9.31
Pump bracket isolator PLX-100-837 in black rubber with metal mounting plate and bolt holes
Save $0.06
$2.04
$1.98

Pump Bracket Isolator PLX-100-837

Pump bracket isolator (PLX-100-837) for Aqua-Hot hydronic heating systems. These rubber isolators mount between the pump bracket and the chassis to...

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$2.04
$1.98
Save $0.06
$302.56

5/8 in PEX Tube

5/8-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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$302.56
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
Clear flexible tubing, 5/8 inch diameter, 6 feet long, suitable for various applications.
$20.26

Clear Tubing 5/8 inch x 6 foot

Clear 5/8-inch tubing, 6-foot length, for Aqua-Hot and Hydro-Hot hydronic heating systems. Used for overflow lines, coolant routing, and sight line...

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$20.26
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
Three-zone pump manifold kit with brass fittings and clear labeling for easy installation.
$0.00

3 Zone Pump Manifold Kit

3-zone pump manifold kit for Aqua-Hot hydronic heating systems. Distributes heated coolant to three independent heating zones for customizable clim...

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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

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