19 November 2018
BUB01 Manual FL15 - 2018-11-19.doc
2
Installation Instructions
The
Rain Backup in a Box
®
is fitted inside the building where the occupiers can, when rainwater
has run out, hear any mains water running from the solenoid valve. Wall mounting is with screws
through holes in the back of the cabinet.
These instructions assume the separate installation of a rainwater system in the building with
rainwater flowing off the roofs through a filter into an underground storage tank and a pump to take
the rainwater through a separate pipe network for toilets, washing machine and outdoor use.
1)
Locate the best position for the
Rain Backup in a Box
®
unit.
a.
Inside the building where the
occupiers can see and hear it.
b.
Within a metre of a 220v AC
wall socket into which to
connect the plug.
c.
Accessible to a mains water
pipe.
d.
Above the top of the
underground storage tank so
that the backup mains water
flows by gravity.
2)
Mount the unit securely to the wall and pipe the mains water to the inlet at the bottom right of
the unit using 15mm pushfit or copper pipework.
3)
Pipe the outlet of the tundish using 32mm waste pipe from the bottom left of the unit to the
rainwater storage tank.
The first 300mm must be straight
; any angle close to the unit
risks the water backing up and flowing back out of the tundish. In most installations this outlet
can be channelled to the closest possible rainwater downpipe from the roof. This backup water
supply does not have to be piped separately to the storage tank.
4)
The overflow pipe (middle) of the Rain Backup in a Box should flow to the exterior through a
pipe which offers no constriction. It is designed to avoid flooding of the house if the pipe from
the tundish to the underground tank is blocked up, and to provide a visual alert to the building
occupants. Run the overflow to the exterior of the building to discharge over the ground or
gully or connect to an adjacent rainwater down pipe.
5)
Channel the float switch cable to the underground storage tank. Typically this is through a
service pipe made of 4 inch (110 mm) plastic which also carries (i) the mains electricity supply
to the submerged pump the return pipe carrying rainwater from the storage tank back to the
appliances in the house.
