CAAF-CONSORCIO DE ABASTECIMIENTO DE AGUA A FUERTEVENTURA DIRECT DEBIT

If you change your bank you'll have to change Direct Debit, more often than not, the new bank tries to transfer DDs to the new account, but it does not work.

So you may have to change DDs yourself.

I found mandate form for water supply by CAAF (covers Puerto del Rosario, not sure if Caleta, Corralejo covered) here is the link

http://caaf.es/descargas/