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14
Flow Restriction
1.10 In installations where the flow rate exceeds
the specification of the Dry-Deck 20, one method
to restrict flow is to insert a flow restrictor in the
outlet of the mixer valve. Where a standard shower
head is not used then pressure reducers may be
used on the hot and cold supply.
Pump Operation
1.11 The Whale pump uses a single membrane to
pump the water away. On the suction stroke, water
and debris are drawn in through the inlet valve.
With a chamber full of water the pump discharges
the water through the two non-return valves on the
outlet. The two outlet valves protect the pump
against losing prime. The aggressive flushing keeps
the pump valves clear of debris resulting in a pump
which does not require regular maintenance.
Unlike other pumps, the Whale has the ability to
run dry without causing damage to the pump.
An additional advantage of the three non-return
valves, is that no smells can be passed back from
the waste stack into the shower area.
1.11
1.12
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