Filters

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.

3 quart expansion tank with 5/16 inch tubing for Aqua-Hot heating models
Sold out
$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
Sold out
Compact Aqua-Hot 200 cabin heater with control panel and vents visible on the front.
Sold out
$176.39

Aqua-Hot 200 Cabin Heater

Aqua-Hot 200 cabin heater for hydronic heating systems in RVs, coaches, and specialty vehicles. This larger capacity heat exchanger with built-in f...

View full details
$176.39
Sold out
A Diesel Photo-Eye Kit 250D with various photography accessories in a compact case.
$114.66

Diesel Photo-Eye Kit 250D

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...

View full details
$114.66
Metal faceplate for SME-200-501 electronic control assembly with mounting holes.
Sold out
$61.52

Electronic Control Assembly Faceplate SME-200-501

Replacement faceplate (SME-200-501) for the electronic control assembly on Aqua-Hot hydronic heating systems. This panel provides the user interfac...

View full details
$61.52
Sold out
Annual service kit in pink color with multiple maintenance tools and parts visible.
$329.99

Annual Service Kit - Pink

Annual service kit (Pink) for Aqua-Hot hydronic heating systems. Contains the essential replacement parts for yearly preventive maintenance includi...

View full details
$329.99
Block of refractory insulation material with a rough, porous surface and light gray color
$260.45

Refractory Insulation

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

View full details
$260.45
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
Gasket kit for ignition module with multiple rubber and metal gaskets included.
$11.75

Gasket Kit Ignition Module

Ignition module gasket kit for Aqua-Hot hydronic heating systems. Contains the gaskets and seals required when servicing or replacing the ignition ...

View full details
$11.75
Valve, Tempering, 120°F to 160°F, AH - PLX-4A8-180
$401.37

Valve, Tempering, 120°F to 160°F, AH - PLX-4A8-180

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 details
$401.37
$271.35

Valve, 1/2" NPTM ESBE 120*F Tempering

ESBE 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 details
$271.35
$952.75

Tube, 5/8 IN, Red 0D Barrier Red Pex 300 Ft.

5/8-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 details
$952.75
$187.92

Pump, HVCC S1

HVCC 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 details
$187.92
$47.83

Valve, Ball Asm 1/2 in. (F) NPT Brass w/Fitting AHE-03, 04

Brass 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...

View full details
$47.83
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...

View full details
$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...

View full details
$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...

View full details
$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...

View full details
$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...

View full details
$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...

View full details
$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 ...

View full details
$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...

View full details
$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...

View full details
$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...

View full details
$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,...

View full details
$0.63

You recently viewed

Clear recently viewed