I often have guests on Shabbos who struggle with keeping Shabbos. Sometimes when we wash for Netilas Yadaim, one of them might turn on the hot water to wash their hands. May I turn off the hot water once they already turned it on?
Water faucet may not be turned off. The reason: turning off the faucet causes to stop the flow of additional cold water, resulting in heating up the cold water…



