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RainAid RA20 Rainwater Harvesting Top Up Valve (Mains Backup)

RainAid RA20 Rainwater Harvesting Top Up Valve (Mains Backup)

Freeflush

£59

Price read from Freeflush on 2026-10-15. Check before buying.

The RainAid RA 20 is a complete revolution as a means of mains back up for tanks and butts. The valve operates in a similar way to a float valve but rather than using a float, the valve uses a neutral weight. When the water level drops in the tank the valves open allowing the bottom of the tank to be filled to a level defined by the user (simply adjust the level of the weight). As the water level rises either by mains back up or an alternative water source such as rainwater the valve closes, allowing the majority of the butt's storage to be used for rainwater. The result of using this valve me

Freeflush's own words, read from their page.

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.