Reply To: using hot water from tank on shabbos

nisht: Actually, I am comforted that the initial posting has engendered some promising discussion -even ,as you say ,it is “le’orer ulepalpel”. I don’t know whether R”Dovid zz’l actually followed his own hetterim (I am sure he was very respectful of the major Poskim like R’Moshe zz’l)but I was floored at the “lomdus” and the vast amount of rishonim and acharonim that he quotes in the teshuvo. R”Dovid Kornglass zz’l was known as the mashgiach- he was much more than that! A true godol! I regret not having known him.

nem621 and kollel-wife- if the pilot light is off, the water will quickly cool down to a point of not being “jad soledes bo”. In normal circumstances, when the water temperature drops to a certain point, it brings the heat back on.

Also, if you can, look at the teshuva. R’Dovid zz’l deals with all the matters that you mentioned,such as “psik reishe’.”gromo”, ‘ein miskaven’ and more.