Graf oneAdvanced Installation Instructions Manual page 22

4 Final assembly and installation of oneAdvanced 16–90 PE
The pumping processes are carried out using air lift pumps
(or "mammoth" pumps). The special construction of the lift-
ers ensures that the minimum water level is defined pre-
cisely (see adjacent figure). If the water level drops below
the T-piece, no more water will be extracted. When in-
stalling the lifters, make sure that the cross-connection is
installed with the T-piece at the height of the minimum wa-
ter level.
Detailed technical drawings of the systems are available from Otto Graf
GmbH and are applicable for assembly and installation.
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Maximum
water level
Minimum water level
Inlet
Compressed air
Operating principle for the feeder
and clear water lifters
T-piece