Reply To: using hot water from tank on shabbos

WIY (and DaasYochid): my very erudite sone pointed me to a teshuvoh by R’Dovid Kronglass zz’l (after the war, mashgiach at Ner Yisroel) in his sefer “Divrei Dovid’ (last teshuvo,number 87) where he discusses this in unusual terms, asserting that, in hilchos shabbos, “gromo’ is muttor. I paraphrase a teshuvo of SEVEN long pages- you can find it in hebrewbooks.org. I will try to quote some of his highlights later.