Based on 1 review
The pump does what it's supposed to. There are two modes: Automatic pumping that is triggered at the adjustable start level to a height about one decimeter from the bottom. Next, set to manual mode for surface drainage down to 3 mm. Fully reasonable that surface drainage takes place under manual supervision because one does not want the pump to run dry and draw air into the system.
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Lowest price for AL-KO DS Premium Submersible SUB 13000 is £94. This is currently the cheapest offer from 1 retailer.