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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.

Metal radiator cap with bail and chain, featuring a sleek design for secure closure.
$232.38

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

$232.38
Brass check valve with a threaded connection and a compact design for fluid control.
$79.99

Brass Check Valve PLX-2A1-300

$79.99
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

$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

$9.47
$9.31

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

$9.31
Black radiator cap with a lever, rated for 13lb pressure, model PLX-102-229-L.
$19.49

Radiator Cap 13lb w/ Lever PLX-102-229-L

$19.49
Pump bracket isolator PLX-100-837 in black rubber with metal mounting plate and bolt holes
$4.99

Pump Bracket Isolator PLX-100-837

$4.99
Metal pump bracket with mounting holes, designed for Buehler C21 model.
$14.99

Buehler C21 Pump Bracket PLX-100-836

$14.99
Black nylon reducer with a 3/4 inch opening on one end and a 5/8 inch opening on the other.
$1.40

AH 3/4 inch Reducer to 5/8 inch Black Nylon

$1.40
$302.56

5/8 in PEX Tube

$302.56
Black nylon coupler fitting, 3/4 inch size, designed for plumbing connections.
$2.62

AH Black Nylon Coupler Fitting 3/4 inch PLX-000-825

$2.62
5-quart expansion tank assembly with a durable design and connection fittings.
$101.58

5 Qt. Expansion Tank Assembly PLE-622-902

$101.58
5 quart expansion tank with 5/16 inch barb fitting in white plastic material
$145.80

5 Qt. Expansion Tank 5/16 inch Barb Fitting

$145.80
Clear 5/8 inch diameter tube hose, measuring 4 feet in length, for overflow applications.
$15.28

Clear Tube Overflow Hose 5/8 inch x 4 foot

$15.28
Clear flexible tubing, 5/8 inch diameter, 6 feet long, suitable for various applications.
$20.26

Clear Tubing 5/8 inch x 6 foot

$20.26
Metal engine pump supply pipe with curved design and mounting flange
$0.00

Engine Pump Supply Pipe

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

3 Zone Pump Manifold Kit

$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

$97.62
3 quart expansion tank with 5/16 inch tubing for Aqua-Hot heating models
$94.26

3 Qt. Expansion Tank & 5/16 inch Tubing

For use in Aqua-Hot Models 5/16 tubing HH 08e, 08m, 09e, 09m, 450-DE1, DM1

$94.26
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

$109.99
Compact Aqua-Hot 200 cabin heater with control panel and vents visible on the front.
$176.39

Aqua-Hot 200 Cabin Heater

$176.39
$0.00

AH 450-DE5 WITH REPORTER, HEAT EXCHANGERS, SUPPLIES

$0.00
A Diesel Photo-Eye Kit 250D with various photography accessories in a compact case.
$114.66

Diesel Photo-Eye Kit 250D

$114.66
Small filler neck with a sturdy design for secure fluid transfer in various applications.
$59.99

Small Filler Neck TNX-NEC-FLL

$59.99
Metal propane exhaust tip end with a cylindrical shape and smooth finish
$14.72

Propane Exhaust Tip End SME-400-015

$14.72
Metal faceplate for SME-200-501 electronic control assembly with mounting holes.
$61.52

Electronic Control Assembly Faceplate SME-200-501

$61.52
Cozy plenum assembly with insulated panels and metal frame for HVAC systems
$254.58

Cozy Plenum Assembly

$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...

View full details
$51.98
Annual service kit in pink color with multiple maintenance tools and parts visible.
$329.99

Annual Service Kit - Pink

$329.99
Green annual service kit containing essential maintenance tools and parts.
$336.99

Annual Service Kit - Green

$336.99
Block of refractory insulation material with a rough, porous surface and light gray color
$73.85

Refractory Insulation

$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

$115.48
White label for a 5-quart expansion tank with clear black text.
$8.50

5 Qt. Expansion Tank Label

$8.50
3-quart expansion tank with a clear label on the side in white and red colors
$3.50

3 Qt. Expansion Tank Label

$3.50
Outer gasket for flame tube compatible with Beckett burner models 375 and 525
$11.38

Flame Tube Outer Gasket (for models 375 & 525) HDE-700-200

For use with models 375 & 525 ATTN: Gasket only used on models that have Beckett burners

$11.38
Oxygen sensor socket with a hexagonal shape and a durable metal finish.
$17.83

Oxygen Sensor Socket AHPW648442

$17.83
Gasket kit for ignition module with multiple rubber and metal gaskets included.
$11.75

Gasket Kit Ignition Module

$11.75
$0.00

1/2 Inch Ball Valve for Drain

$0.00
$0.00

Manifold Drain Assembly Kit

$0.00
$0.00

2 Zone Pump Manifold Pipe Assembly

$0.00
$60.92

Brush (Set) March, 809 High Speed

$60.92

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