We keep it Turn ON. If there is no hot water, STEP① Make sure the panel is on STEP② Open the tap fully and keep running hot water for a while.
✅There is a hot water supply panel by the kitchen
STEP③ If you still can't use the hot water(Even if you do 1 and 2), go out to the corridor and long press(5 sec) the restore button on the gas meter. →【Wait 60 second】then please check hot water.
✅Tap WATER
Tap water in Japan is safe.
You can drink tap water.