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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.

Combustion chamber tube gasket designed for specific engine models and low emissions versions.
$9.53

Combustion Chamber Tube Gasket HDE-700-205

Combustion chamber tube gasket for Models 375, 400 and 525 and low emissions models AHE-450 AND 600D

$9.53
Metal pressure relief valve with 125psi rating and threaded connection
Save $15.40
$135.40
$120.00

Pressure Relief Valve 125psi PLX-111-125

$135.40
$120.00
Save $15.40
Garber General Fuel Filter with a cylindrical design and metal housing.
$29.99

Garber General Fuel Filter - FLE-120-100

$29.99
$10.82

Fitting, Brass, Barb, 3/4 X 1/2, (M)NPT, HH

$10.82
Buehler C21 Pump PLX-100-900 with a compact design and control panel for fluid transfer.
$152.90

Buehler C21 Pump PLX-100-900

$152.90
145F tempering valve PLX-09P-100 with metal body and adjustment knob visible
Save $47.87
$497.86
$449.99

145F Tempering Valve PLX-09P-100

"Make a splash with perfectly tempered water - get your Aqua-Hot Parts 145F Tempering Valve PLX-09P-100 today!"

$497.86
$449.99
Save $47.87
Black rubber filler neck gasket with a circular shape and smooth edges
$5.95

Filler Neck Gasket PLE-GAS-010

$5.95
Buehler C20 pump retrofit kit for aqua-hot and hydro-hot circulation and pre-heat systems
Save $11.28
$225.50
$214.22

Buehler C20 Pump Retro Fit Kit 400/450 - PLE-100-905-FRU

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...

View full details
$225.50
$214.22
Save $11.28
Refractometer with a clear scale for measuring glycol antifreeze concentration.
$65.75

Refractometer for Glycol Antifreeze MSX-907-162

$65.75
CONS Nylatch Plunger model HDX-100-200 with black plastic body and metal pin.
$1.38

CONS Nylatch Plunger - HDX-100-200

$1.38
Fuel return line tube assembly with connectors and durable rubber construction.
$22.45

AH Fuel Return Line Tube Assembly - FLE-421-852

$22.45
AH Fuel supply line tube assembly made of metal with connectors on both ends
$28.99

AH Fuel Supply Line Tube Assembly

$28.99
$401.37

Valve, Tempering, 120°F to 160°F, AH

$401.37
$271.35

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

$271.35
$952.75

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

$952.75
$187.92

Pump, HVCC S1

$187.92
$5.25

Valve, Air Combination Coin / Key DO NOT BUY

$5.25
$47.83

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

$47.83
Bosch Assist Pump kit with various components for efficient fluid transfer.
$357.38

Kit, Bosch Assist Pump

$357.38
Fuel kit with JIC male fitting, nut, and ring components displayed on a white background.
$75.07

Fuel Kit, JIC Male w/Nut & Ring Complete

$75.07
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",

$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",

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

Vented Hydronic Heater Overflow Cap with Tether

$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

$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

$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

$21.62
Aqua-Hot 100 cab heater with a compact design and adjustable heat output features.
$212.29

Aqua-Hot 100 Cab Heater

$212.29
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

$23.68
$50.80

Water Heater Insulation Blanket Kit

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

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

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

12 in. Cable Tie

$0.63
$116.63

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

$116.63
$82.92

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

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

Blower Wheel Fan Motor HDX-162-511

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

80414 Hose 3/4 Preformed, 90 degrees

$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

$25.00

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