First turn water heater electric off and check the inlet and outlet piping for visable leaks at the tank next remove covers on the elements and see if they are leaking around the seals,usually if a tank is leaking it will be a steady leak not occasionally , do you have a pressure tank in your water supply before the water heater if not that could cause the T&P valve to release water due to pressure spikes,and that could cause occasionall leaks ,if that is the case you can get one at a home improvement center for about $15.00 or so,it may be just a bad T&P valve,which any handyman can fix.if you don't have a pressure tank in your water system you'll need to have one installed by a qualified plumber,new tanks i've installed state in the manual that a pressure tank needs to be in the water system,hope this helps you.
Here are a few tings to look for:
When COLD WATER comes into the heater, it might cause sweating of the Cold water line, if the humidity is high in the house? This is usually in summer time only-- when the humidity inside the house is higher..
Another possible place, is the relief valve:
If you have a check valve or two in the system, that ends up trapping all the COLD water in the tank, as it goes thru its heating cycle, -- the Cold water expands, and has to be relieved-- Thus the relief valve will spit out a puddle of water keeping the pressure at a safe level.
(However-- usually the system has a drop pipe coming out of the relief valve-- so likely you would have said that the puddle was at the bottom of the drop pipe-- and you probably would have suspected it..)
However-- Do these suggestions give you some ideas of where the water puddle is coming from ?
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Mack B
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