Upgrade your water system for a smoother, more efficient flow with the Fiamma A20 Expansion Pressure Tank. Designed for caravans, motorhomes, boats, and any setup using 12 V pressure-switch water pumps, this compact tank is a simple but powerful addition to any mobile-water installation. 

Features

• Eliminates pulsating water flow: The A20 absorbs the on/off cycling typical of pressure-switch pumps, replacing bursts with a constant, smooth flow whenever you open a tap or shower
• Absorbs water hammer and pressure spikes: Its internal diaphragm cushions sudden pressure changes, protecting your pump, plumbing, and fittings from stress or damage
• Reduces water and power consumption: Due to the flow being smoother and more controlled, the pump doesn’t have to cycle on and off constantly, lowering electricity use and extending its service life
• Universal compatibility: Works with virtually all 12 V pressure-switch water pumps, including Fiamma, Shurflo, and Flojet, making it ideal for caravans, motorhomes, campervans, boats, and other off-grid water systems
• Compact & lightweight: At around 0.3 kg, the tank is small enough to fit into tight lockers or pump compartments - comparable in size to a standard 750 ml bottle of water
• Pre-charged & adjustable: The A20 comes pre-charged to 0.9 bar (13 psi), ready to use with compatible pumps. For systems with different pressure settings, you can re-charge the tank using a regular compressor and special valve (up to max ~3 bar as recommended) to match your pump’s pressure switch
• Durable build: Made from high-quality, water-safe materials with a robust internal diaphragm - built to enhance longevity and reliability of your water system