MB 319.12 – MB 319.14 – Filtering Wine, Pouring Dregs, and the Rules of Borer on Shabbos

This episode continues the laws of Borer (selection and filtering) on Shabbos, focusing on filtering wine and water. It clarifies when filtering is permitted using non-designated items (like cloths or wicker baskets), when special filters may be used, and the limits placed to avoid weekday-style activity. The shiur explains the issue of raising a basket above a utensil, the concern of creating a “tent-like” structure, and the concept of shinui (making a recognizable change from weekday practice).It also covers prohibited methods of filtering, such as tightly stuffing straws or splinters into spouts, and the halachos of pouring wine from one vessel to another—especially when to stop to avoid separating wine from dregs. Finally, it reviews the core principles of Borer:Removing refuse from food is prohibitedUsing a כלי (filtering utensil) is prohibitedSeparating for later use is prohibitedPermitted selection must be immediate use, by hand, and removing the desired item from the undesired