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so the pump parts wear out too fast, or parts break.</li>
<li>With different depths, different sizes of pump pipes are needed, otherwise the pumping becomes to heavy. See manuals on websites
of [http://www.practicafoundation.nl Practica Foundation ] and Connect International.</li>
<li>The pump needs a “blocking system” on the handle to avoid return of the handle, which can be dangerous for children.</li>
<li>Compared to piston pumps the rope pumps splashes more. </li>