A genuine OEM expansion (accumulator) tank for caravan, motorhome, and boat fresh water systems. The Fiamma A20 smooths pump cycling, delivers a consistent water flow, reduces wear on your pump, and helps conserve water and energy.

OEM Part Number: 02478‑01

Finish: Black plastic body

Dimensions (including fittings): 235 × 150 × 100 mm

Pre-Charge Pressure: 0.9 bar (13 psi); adjustable using valve or compressor (max ~8 bar)

Connection: ½″ BSP + 12 mm hose barb fittings included

Compatibility

Compatible with:

Works with all pressure-switch water pumps, including Fiamma, Shurflo, Whale, Flojet, Aqua 8, and many others

Reduces pump cycling, delivering cleaner, pulse-free flow, ideal for tap use or showering

Reduces water consumption and electrical draw, while easing strain on pipes and circuits

Compatibility

Compatible with:

Q: What is an accumulator tank used for?
It acts as a pressure buffer, smoothing out water flow and preventing pump bang on/off cycles, resulting in quieter and more efficient operation.

Q: Where should I install it?
Mount it within the first meter of your pump output for best performance. It works in any orientation.

Q: Does the tank need air recharging?
It’s factory-precharged to 0.9 bar. If needed, you can recharge it using a regular air compressor via the built-in valve.

Q: Will it prevent leaks or water hammer?
Yes, the internal diaphragm absorbs pressure spikes, protecting both pump and pipes.

Q: What’s included?
The kit comprises the A20 tank, pre-assembled with barb and BSP fittings—only the tank replaces, no other parts needed.