If your valve is located on the top of your water heater like in the picture below check to see where it s leaking from.
Water heater leaking from top vent.
The drain valve may get leak sometime when handle hit on drain valve it become leak.
Your pipe fittings are loose.
One of the most common reasons your hot water heater may be leaking at the top could be due.
Leaks from the top of the water heater are usually caused by one of the three connections at the top as shown in the diagram below.
Electric switch or turn the gas control valve to off 2 attach garden hose to the drain valve.
At the bottom of the tank there must drain valve in every cold hot water heater leaking from top.
On the other hand water runs downhill so failure to fix the leak can lead to more serious problems including electrical shorts additional damage to the water heater and the possibility of water damage such as ruined carpeting or drywall.
Rain water when rain water travels down the flue vent pipe of a gas water heater it can collect on the top of your tank.
Check if there are any droplets of water on top or on the bottom of the water heater tank or inside the combustion chamber.
Here are a few other possible causes.
The first place to check is the plumbing pipes above the water heater.
From its base where it screws into the water heater from the piping attached to the t p relief valve and also coming out of the open end of the pipe.
The water from the hot water heater overflow at the bottom of the tank.
Turn off the water supply to your water heater using a pipe cutting tool like this one for tight spaces cut the water pipe a couple inches below the lowest soldered.
A water heater leaking from the top is preferable to one from the bottom.
5 open drain valve.
1 connection that generates hot water 2 connection that generates cold water 3 connection that releases pressure.
Drain your tank just slightly so you don t get any overflow as you remove the parts your replacing along with pulling.
If your hot water heater is leaking from the top follow these tips faulty water inlet valves.
4 shut off water inlet to hot water heater.
Fortunately and to your relief sometimes when your water heater is leaking from the top it may not be because of a malfunctioning or defective part.
Two places it may be leaking from include.
6 open the pressure relief on the top vent and cycle several times.
A drip from above can easily leak down on top of the water heater and even work its way down the insulation and make it look like the leak is coming from the tank itself.
1 turn off the water heater.
Another reason your hot water heater may be leaking at the top could be because.
Look to see if the draft hood over the vent hole is centered and if the legs are straight and secured by screws this may depend on the design of the pipe.