Fiamma 70 Litre Water Tank

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Fiamma 70 Litre Water Tank
Fiamma 70 Litre Tank Fit Kit
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  Product Description
The Fiamma 70 Litre Water Tank is one of the most widely used onboard fresh water tanks in the UK caravan, motorhome, and campervan conversion market. Made from non-toxic material, it's rated for drinking water storage, so you're not just looking at irrigation-grade plastic. The tank arrives with all the hardware you need to get it fitted: four mounting bolts, two barbed hose connectors for 12mm (internal diameter) hose, and the relevant fittings for the 38mm water inlet and 13mm air outlet. Fiamma part number is 08306-03 and the EAN is 8004815411565. It's a dark blue colour, which gives it good UV tolerance if part of it is ever exposed.

How does the Fiamma 70L tank fit into a motorhome, caravan, or campervan?


The Fiamma 70 Litre Water Tank measures 700mm x 470mm x 240mm and weighs approximately 3.7kg empty. It mounts either horizontally on the floor or vertically against a wall using the supplied clamps and bolts, and the water outlet position has six options, giving you real flexibility to match your plumbing layout before you drill anything.

The tank suits builds where you want a permanently plumbed, concealed fresh water supply, whether that's under a seat base in a van conversion, inside a motorhome locker, or tucked against a bulkhead in a caravan. The outlet connects to a 12mm semi-rigid hose, which is then fed into your water pump. For the air outlet, a 13mm hose runs up to join with the filler point on the vehicle side to allow the tank to breathe as it fills and empties. Silicone sealant around both the inlet and outlet pipe connections gives a secure, leak-free finish. The updated ergonomic red cap makes filling and sealing straightforward, with a better grip and cleaner seal than the earlier design.

At 70 litres, this tank holds considerably more than the portable roll tanks in Fiamma's range, making it the go-to choice when you're building a self-contained water system rather than relying on refillable carriers. Van converters in particular tend to mount two of these on opposite sides of the vehicle for extended off-grid capability. It pairs naturally with the Fiamma Aqua 8 water pump and the Fiamma A20 expansion tank if you want a smooth, pulse-free water flow. Spare parts including the replacement red cap seal and the service cap are stocked separately, so the tank is fully maintainable over its lifespan.

Specifications
  • Tank dimensions cm: 70 (L) x 47 (W) x 24 (H).
  • Weight: 3.7kg.
  • Colour: Blue.
  • Inlet diameter: 38mm.
  • Outlets: 13mm.

Frequently Asked Questions


Can the Fiamma 70 Litre Water Tank be installed vertically or does it have to lie flat?
The Fiamma 70 Litre Water Tank (08306-03) installs either vertically against a wall or horizontally on the floor. The supplied mounting clamps accommodate both orientations. The water outlet has six possible positions on the tank body, so the plumbing connection point adapts to whichever direction the tank is mounted. This flexibility is one of the primary reasons the tank is popular in campervan conversions where available space dictates the installation angle.
What are the exact dimensions and hose sizes for the Fiamma 70L Water Tank?
The tank measures 700mm long x 470mm wide x 240mm high and weighs approximately 3.7kg when empty. The water inlet pipe diameter is 38mm (suitable for a 40mm hose). The air outlet diameter is 13mm. The hose connectors included in the kit accept 12mm internal diameter semi-rigid hose for connection to a water pump. These measurements are essential when planning the space allocation in a vehicle build before ordering.
What fittings are included with the Fiamma 70 Litre Water Tank?
The tank ships with four mounting bolts, two barbed hose connectors for 12mm internal diameter hose, and the fittings required for the 38mm water inlet and 13mm air outlet connections. A tap is not included. Fiamma recommend applying silicone sealant around both the inlet and air outlet pipe connections when fitting to achieve a leak-free installation. The red service cap is integrated into the tank lid and is part of the current ergonomic redesign for easier filling and sealing.
Is the Fiamma 70 Litre Water Tank safe for drinking water?
Yes. The tank is manufactured from non-toxic material specifically rated for fresh drinking water storage. It is designed and marketed for use as a potable water tank in caravans, motorhomes, and campervan conversions. It is not a waste water tank; the Fiamma range includes separate waste water tanks for grey water collection. The dark blue colouring also provides a degree of UV tolerance for installations where part of the tank may be partially exposed.
Does the Fiamma 70L tank have internal baffles to reduce water movement while driving?
No, the Fiamma 70 Litre Water Tank does not have internal baffles. The tank is a single undivided chamber. Some water movement can be heard when driving with a partially filled tank, which is normal for this type of onboard tank. Installing the tank in a position where it is firmly secured by all four mounting bolts reduces any movement of the tank itself and is standard practice.
What is the Fiamma part number for the 70 Litre Water Tank and are spare parts available?
The current Fiamma part number is 08306-03. Spare parts available separately include the red cap seal and the 88mm service cap, both of which are stocked independently at Leisure Shop Direct. The tank EAN is 8004815411565. Earlier versions of this tank carried part number 08306-01; the current version features an updated, more ergonomic red cap with an improved seal compared to the previous design.
EAN-13 : 8004815411565

1 Customer Review on Fiamma 70 Litre Water Tank

Kev / Selfbuild

by Caravaner (23 Jun 2010)
5 star review(5/5)
excellent product no problems with fitting .
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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