SEIF 12 (Cont.)
The Bais Yosef pondered on the prevalent Minhag of S'fardim during his lifetime to wash before Kiddush being made on wine. Since according to all the Rishonim that we have previously quoted that learnt the Gemara about washing before Kiddush as referring to making Kiddush on bread, there is no Mekor to allow washing before Kiddush on wine.