19 November 2018
BUB01 Manual FL15 - 2018-11-19.doc
1
Plug-and-play mains water backup
for direct feed rainwater harvesting systems
Mains backup unit to ensure direct feed
rainwater harvesting systems have
sufficient water in times of low rainfall.
Toilet flushing, clothes washing and any
outdoor use of water can be serviced by
the submersible water pump inside a
tank.
In low rainfall the supplied float switch
will detect if the system is empty. This
signals an electrically activated solenoid
to open in the control unit, allowing
mains water to flow into the system.
When the float rises the solenoid is shut.
This means the tank is only partially filled- leaving a bulk
of the storage tank remains empty ready to admit the
water from the next rain shower.
U.K. Building Regulations require that rainwater cannot
possibly flow back into the mains water supply. For this
reason all mains backup devices must have an air gap where the mains water flows into the
rainwater tank. The simplest way to do this is for the mains water to flow through open air into an
inverted cup-shaped device called a tundish. The Rain Backup in a Box (Product ID RWH-BUB01)
features a multi-route anti-splash “tundish” and overflow incorporated into one transparent section.
It is housed with the solenoid in an off-white plastic cabinet 325 L x 260 H x 95 D millimetres. The
float switch is provided with around 15 metres of cable. Please contact your supplier if you require
longer cable
