Attach the blue coded fitting to the cold water inlet with the arrow facing into the water heater.
Water heater cold inlet valve.
If any of the inlet or the outlet pipe starts leaking there may be some water formation on the top of the water heater.
Gas and tankless heaters will have a cut off valve usually with a red handle along the line leading to the hot water heater.
A water heater has two shut off valves.
A faulty or loose temperature and pressure relief valve or inlet valve may also be the cause of leak.
Same as with an electric water heater you should first check the cold water inlet and hot water outlet pipes and connections to make sure they are not loose.
So the first thing that you need to do is to check the cold water inlet pipe.
Water leaking from the bottom.
Using two adjustable wrenches or pipe wrenches disconnect the piping above the tank.
Your cold water inlet valve is where cold incoming water from your home s main water line enters your water heater.
See water heater leaking from the top for more information.
A cold water inlet valve often identified by a blue handle feeds cold water from the main supply into the water heater.