Thermal imaging is the easiest way. Also, an electronic trace can be put on the line and it can be followed under the concrete. Leaks in the line can be found other ways.
Someone hooked up the hot water supply to the toilet instead of the cold water supply- or your water heater is back drawing hot water through to the toilet from a cold water inlet (supply)
Fred'k Dye has written: 'Hot water supply' -- subject(s): Hot-water supply
No, a hot water tank heats water by itself.
Someone shut the hot water supply off to your unit
No, a hot water tank heats water by itself.
Yes
The cold water supply enters the tank at the bottom near the burner. Heat rises, as does hot water. The hot water supply is piped out from the top.
water regulation require that cold water supply pipe from the cwsc to tap outlets and the hot water storage vessel be isolated, with what
Vent - Cold Water Supply - Drainage - hot water supply /return
Check if the water supply line valve underneath the sink is on or off .."On" will be turning counterclockwise ,If not look for the hot water heater and make sure the water supply valve is turned on.
Obstruction in the hot water supply line, bad valve, or broken water line. Drain system and remove valve cartridge, open hot supply to blow out line and see if water comes out. If it does than you have a bad cartridge, if not broken line that needs to be repaired.
Check the supply valves. Chances are the hot water supply valve is not fully opened.