Water is pumped in through the inlet
(1) and inlet screen (2) flowing up through the floating bead bed
(3) where filtration takes place
Filtered water exits through the outlet
screen (4) and the outlet checkvalve (5)
Backwash
The pump is turned off and the inlet valve (1) and
outlet check valve (2) close automatically.
The air inlet valve (3) opens as waste water starts
to flush out of the waste outlet (4)
The beads tumble clean (5) in a cascade of
airbubbles and dirt is drawn out through the screen (6). Once the
filter has drained, the pump is re-started and filtration
continues.
TwinValve
System
The patented dual valve system automatically
controls the backwash:
Manually turn off the pump, or simply wire
your pump through an appropriate timer for a fully
automatic backwash.
Typical
Configuration
Water enters the filter inlet (A) from a
submersible or surface pump with a strainer fitted (2mm
gauge or less).
The filter need not be buried - high mounting
positions make the most use of gravity to power the backwash
process.
The filter can be sited below pond level if the
optional 'Low-Site Valve Assembly' is used.
Waste water drains from outlet B.
It can be used for irrigating gardens providing no
salt as or chemicals are used in the pond.
Filtered water is returned above the pond surface to
maximise aeration.
BubbleBead filters have many advantages over alternative
forms of filtration:
Compact and suited to remote siting
Low maintenance
Polishes water and removes solids
Uses standard pumps
Purpose moulded
Internal screens prevent media loss
BubbleWash maintains biofilm
Biofilm is tolerant of power cuts
Automation capability
Unlike chamber filters
Unlike foam pad and brush filters
Unlike fluidised bed filters
Unlike sand filters
Not just a modified tank
Unlike some fluidised bed filters
Unlike some power washed filters
Unlike many submerged-media filters
saves hours in routine maintenance time
backwashes while you're away on business or holiday
Which Model?
Choosing the correct size of filter is straightforward:
Weigh out the maximum amount of food that is likely to
be fed in one day.
Check this against the 'Max. Feed Rate' column in the
table to find the appropriate filter.
Check that the pond is within the maximum volume limits
for that size of filter - if not, move up to a larger
filter.
