$3
saving
Choose a 7.5 L or 13 L AUTOTERM diesel heater fuel tank for your caravan, motorhome or campervan. Both sizes provide an auxiliary diesel supply for compatible AUTOTERM heater installations and include mounting brackets and miscellaneous nuts and bolts. Select the tank capacity above to see its price and availability.
Compare tank sizes
| Specification | 7.5 L tank | 13 L tank |
|---|---|---|
| Capacity | 7.5 litres | 13 litres |
| Dimensions | 345 × 370 × 100 mm | 450 × 330 × 150 mm |
| Supplier SKU | RVD638 | RVD639 |
| Choose this size for | A shallower tank where mounting space is limited | Greater fuel capacity where mounting space allows |
| Included | Tank, mounting brackets, nuts and bolts | Tank, mounting brackets, nuts and bolts |
Heater compatibility
7.5 L: RV Supplies lists RVD638 for AUTOTERM Air 2D and Air 4D heater installations.
13 L: AUTOTERM lists compatibility with Air 2D, Air 4D, Air 8D, Air 9D, Flow 5D / 5B, Flow 14D and 30SP-24 heaters. RV Supplies also maps RVD639 to Air 2D and Air 4D installations.
For a diesel heater installation, use the fuel specified by the heater manufacturer. Confirm your exact heater, fuel pickup, hose routing and fittings before ordering; tank capacity alone does not establish compatibility.
What is included?
Each variant includes one tank in the selected capacity, mounting brackets and miscellaneous nuts and bolts. A heater, fuel pump, fuel line, filter, standpipe and installation-specific connectors are not listed as included.
Choosing and installing your tank
Measure the mounting area and allow access for filling, the cap and fuel connections. The 7.5 L model is 100 mm deep; the 13 L model is 150 mm deep and holds 5.5 litres more fuel. Runtime depends on your heater and operating conditions.
Mount the tank in a protected position and follow the tank and heater instructions. A competent installer should confirm the arrangement, including suitability for any boat installation.
Browse our AUTOTERM Air 2D and 4D 12V diesel heater kits to plan a complete RV heating installation. Select Caravans offers RV accessory advice from Auckland and nationwide New Zealand delivery.
Frequently asked questions
Should I choose the 7.5 L or 13 L fuel tank?
Choose 7.5 L for a shallower 345 × 370 × 100 mm tank. Choose 13 L for greater capacity if your installation can accommodate 450 × 330 × 150 mm.
Do both sizes suit AUTOTERM Air 2D and Air 4D heaters?
Yes. The supplier lists both tank sizes for Air 2D and Air 4D installations. Check the required fuel pickup, line and fittings for your installation.
Which tank is listed for AUTOTERM Flow heaters?
The manufacturer lists the 13 L tank for Flow 5D / 5B and Flow 14D. The 7.5 L listing here confirms Air 2D and Air 4D compatibility only.
Are fuel lines and a pump included?
No fuel line or pump is listed as included. Both sizes come with mounting brackets and miscellaneous nuts and bolts.
