Hot Water

Question

You have written previously that you can turn on the hot water in a building on Shabbat because it is like a refridgerator. My building, however doesn't have a hot water tank. Instead, when you turn on the hot water, a flame is turned on which heats water as it goes through the pipes. As far as I can tell, the mechanism is nonelectric. 1) Can I turn on the hot water on Shabbat? 2) Yom Tov?

Answer

Answered by Chaim Yisrael Abadi

Where was that written? Thanks CYA