PowerSpout
React Pump Installation
© 2019 EcoInnovation Ltd (NZ) V2.1
Page 69
Key parts to a good suction intake design:
4.2.12.
25mm ID
short
suction hose (lengths up to 5m can be supplied in NZ with your
React pump) with as little lift a possible, and never more than 6 metres (ideally <3m).
1 x 25mm foot valve and pipe clamp (supplied in NZ with React pump).
1 x foot valve, filter, supporting wire frame basket and two reusable filter socks.
Steel/timber pegs as required to secure intake (not supplied).
The stainless wire basket ensures that the filter bag does not
collapse around the foot valve which would reduce the effective
filtering area. The large surface area of the filter bag means that
it will not need cleaning often. It is does need cleaning/replacing
too often it is too small, make a larger one.
The filter bag should be replaced as required. An intake that
needs cleaning every 2-3 months or longer is a realistic goal to
work towards in the design of your intake design fine tuning.
If after removing the filter sock, the foot valve strainer is
completely blocked with debris after only a short duration, then
fit a larger wire basket and fabric screen until an acceptable
cleaning duration is achieved.
For reasonably clean water resources the filter screen supplied
will work fine and prevent small (< 1mm) aquatic life forms and
particles from entering the suction line. With the filter bag
removed the foot valve strainer would quickly block with leafs
and grasses. Removing the foot valve strainer risks pump
damage and is not advised.
The picture opposite show a filter material wrapped several
times around the wire mesh basket over the foot valve. It has
been secured in place with cable ties. Such a solution will last
about 3 months in a clean water resource after which the
material should be replaced and the foot valve cleaned. Dirty
water resources are likely to need a larger intake to reduce
cleaning intervals.
Filter sock advice
4.2.13.
It is surprising how quickly a filter sock can become completely
blocked. Once this occurs the suction increases which can lead
to cavitation damage, loss of water prime, overheating and
pump damage.
We advise a filter sock with a 1mm opening. Two are supplied
with each React pump and packs 5 filter bags are available
from our web site.
