Webasto – Fuel Pump 10 Bar Kit – WPX-503-03A

(0 Reviews)

$758.28

Part #: WPX-503-03A | Fuel Pump 10 Bar DFL Aluminum Viton Kit

Fuel Pump Kit – Dual Line, Diesel, DFL Aluminum Viton Housing, 10 Bar

This Fuel pump 10 bar DFL is used in Webasto DBW-2010 Burner Head Aqua-Hot, Hydro-Hot RV Hydronic Heating Systems.

Be sure to replace the nylon drive gear which drives the fuel pump, which often cracks internally and the gear snap ring because the clip will bend when removed with snap ring pliers.

Drive Gear: WPX-371-289
Gear Snap Ring: WPX-152-390


Aqua Hot Parts Breakdown

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Description

Webasto – Fuel Pump 10 Bar Kit – WPX-503-03A for Aqua-Hot, Hydro-Hot, and DBW-2010 RV hydronic heating systems, DFL aluminum Viton construction. Use this genuine Webasto fuel pump to rebuild your DBW2010 and Scholastic coolant heaters.

Part #: WPX-503-03A | Fuel Pump 10 Bar DFL Aluminum Viton Kit

Fuel: Diesel
Part Type: Replacement Fuel Pump
Attribute: DFL Aluminum Viton Housing
Attribute: 10 Bar
Aqua-Hot WPX-503-03A

Included in the Kit:

Upgrade or rebuild your RV’s hydronic heating system with the genuine Webasto – Fuel Pump 10 Bar Kit – WPX-503-03A.  Engineered for Aqua-Hot, Hydro-Hot, and Webasto DBW-2010 diesel burners, this high-pressure fuel pump delivers consistent fuel flow, maintaining optimal combustion for efficient, reliable heating.

This complete kit includes everything needed for a proper replacement: a 10 bar (145 psi) fuel pump, 4 copper gaskets (WPX-150-754), 2 banjo bolts (WPX-150-754), and a high-pressure fuel pipe (WPX-665-49B), ensuring a seamless installation and reliable system performance.

Your Hydronic Heating System, whether it is an Aqua Hot, Hydro Hot or Webasto DBW 2010 has a white label with a model number on the heater. This label can be found on the top or on the side of your Aqua Hot, Hydro Hot or Webasto Heating System.

List of compatible model numbers,
Aqua Hot

431/12
AHE-100-00S
AHE-100-01S
AHE-100-02S
AHE-100-03S
AHE-100-04S
AHE-101-000
AHE-120-03X
AHE-120-04X
AHE-130-03X
AHE-130-04X
AHE-450-DE1
AHE-450-DE2
AHE-450-DE3
AHE-450-DE4
AHE-600-D01
AHE-600-D02
AHE-600-D03

Aqua Hot Cont.

400-D
450-D
600-D
400D
450D
600D

Hydro Hot

HHE-200-07E
HHE-500-07M
HHE-200-08E
HHE-500-08M
HHE-200-09E
HHE-500-09M

Webasto

DBW 2010
DBW 2020
DBW 300
DBW 350
Scholastic

Additional information

Weight 1 lbs
Dimensions 12 × 12 × 9 in

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Customer Reviews

Alex Barker
Rating: 5/5
The parts were fine 12 V burner head
I still have other issues. It won’t run quite 24 hours without at least kicking out once and you have to flip the switch inside the couch to get it to start again. My tech is having trouble finding the problem thanks.
Thu May 08 2025 18:37:47 GMT+0000 (Coordinated Universal Time)