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ma dite che e' normale il borbottio da caffettiera guardate cosa mi ha risposto la deltec....
please make sure that the air intake (orange valve, air house, venturi at the pump intake) is clean and unblocked, also make
sure that the impellor of the pump is clean. Check the flap in the pressure side of the pump for free movement.
Set the airtap (orange) to the 2 o'clock position. The skimmer should then operate without the noise you describe.
kind regards
W. Weidl
qualkuno e' bravo con l'inlgese
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