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Answer:Our research indicates that at least some wine experts are more discriminating than you and say that even with the pump, the wine can "survive" only 3-5 days. For them, we imagine there is significant loss to wait until the end of Shabbat. We will start our answer for them.
The Magen Avraham (321:7) discusses meat before kashering whose deadline for washing before the salting is on Shabbat. He posits that, in theory, if it were necessary to prevent loss, one would be allowed to rinse it without hachana being a problem. One of the sources for this concept is the halacha that one may move a non-muktzeh utensil to protect it from breakage or theft, even if he does not need it on Shabbat (Shulchan Aruch, Orach Chayim 308:4).
In practice, the Magen Avraham forbids the rinsing because even after the deadline, one may kasher the meat by broiling. Considering that some people prefer salting to broiling, we see that not any "loss" justifies hachana, thus raising questions about freshness of wine. On the other hand, there is certainly not a requirement of total loss. Even meat that cannot be kashered at all can be sold to a non-Jew, and yet if not for the solution of broiling, rinsing would have been permitted. Those for whom their expensive wine will lose its value if they do not promptly pump the air out may do so on Shabbat. (We also see from the halacha about protection from theft, that preventing possible significant loss suffices).
Let us now deal with your question from the perspective of one like you for whom waiting until after Shabbat is not impactful. A husband may revoke his wife’s oaths on Shabbat only because he cannot do so after Shabbat (Shulchan Aruch, OC 341:1). In general, when there is an alternative to avoid loss after Shabbat, one must wait (see Shemirat Shabbat K’hilchata 28:91). The concern that you might forget to pump after Shabbat is probably not sufficient, under normal circumstances, to justify doing so on Shabbat (we do not find that concern regarding the oaths).
Bemare Habazak - Rabbis Questions (654)
Various Rabbis
53 - The Focus of Discussions at the Seder
54 - Pumping Air from a Wine Bottle on Shabbat
55 - Shehecheyanu, Clothes, and Renovations During Sefira
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Another possible leniency is based on a rule championed by Rav S.Z. Auerbach and cited by several contemporary works (see Shemirat Shabbat K’hilchata 28:89). Actions that a person does naturally, as a matter of course, without specific thought of doing it now to save time later, are permitted even if their benefits are only after Shabbat. Some examples are taking home one’s tallit and siddur after shul and putting food in the refrigerator (and even the freezer- ibid.; that is a considerable extension). These are considered finishing off the previous usage. While pumping air from a wine bottle seems to me to be a deliberate action with a clear thought process, perhaps for more serious wine consumers, it is as natural as returning the cap to a soda bottle.
In summation, it is permitted to pump the air from a wine bottle on Shabbat for those who consider it a real loss to wait. Other users have what to rely upon if they want to do so on Shabbat instead of waiting. The strength of the leniency may depend on the level of discrimination and the extent to which doing so is a standard, almost trivial action.
Various Rabbis
Various Rabbis including those of of Yeshivat Bet El, such as Rabbi Chaim Katz, Rabbi Binyamin Bamberger and Rabbi Yitzchak Greenblat and others.
Moreshet Shaul Moreshet Shaul: A Crown and its Scepter – part II
Based on Siach Shaul, Pirkei Machshava V’Hadracha p. 294-5
Rabbis in Midrash
Lessons
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Kuzari -Rabbi Ari Shvat Kuzari class 9 - "Seeing is Believing" (parag. 21-30)
These paragraphs elaborate on the theme that seeing and knowing is better than any attempt to prove logically, and begins explaining the difference between Israel and gentiles.
Ein Aya Various Universal Stages of the Geula Process
Rav Kook examines the various stages of redemption, explaining how (in addition to the obvious oft-mentioned stages of ingathering the exiles, reviving the Hebrew language, army, state etc.) the messianic dream of world prosperity, the State of Israel and world unity can and are realistically and logically gradually coming true.
Kuzari -Rabbi Ari Shvat Kuzari class 8- "Answering Questions on the Kuzari's Proof from Mass Revelation
How do we know that the "claim" of mass revelation to 2,000,000 witnesses at Mt. Sinai is really true? This important class answers all of the questions skeptics ask about this claim of the Kuzari.
Ein Aya Armies Still Necessary for Balance & the War Against Wars
Rav Kook explains why the world was originally divided into the various seemingly contradicting ideologies and cultures, in order to develop each one respectively. Swords or armies symbolize how each respective ideology defends themselves, as well as deters their opposing ideologies and cultures. On the other hand, the messianic era will be one of peace, and Rav Kook explains the transition to that stage, which mankind is already undergoing.
The Land of Israel LGBT'S IN ISRAEL
The question was asked, how can one make Aliyah with the LGBT parades?
Kuzari -Rabbi Ari Shvat Kuzari class 7 - Five Accumulative Proofs of G-d
As a preparation for the Kuzari's classic proof of G-d from the mass-revelation at Sinai, we start here with 5 other directions to strengthen our belief which also contribute to what the Kuzari will present as well.
Ein Aya Muscle & Meaning: The Dual Nature of Gevurah (Physical Strength)
Is physical strength and fitness a necessity or an ideal? Although it if often totally overlooked among topics of Judaism, Rav Kook writes that it clearly is also a necessity to deter the many enemies of Israel, but even in Y'mot HaMashiach, in the Messianic era, to a certain extent, it's ideal continues even after our enemies will have been finished off.
