We have an approximately 4 year old gas-fired 50 gallon hot water
Based on recommendations I saw on one of the TV howto shows, I tried
to unscrew and examine the sacrificial anode for corrosion.
However, I could not get the large nut on top of the water heater to
budge. I tried liberally applying liquid wrench and using as much
force as I dared so as not to damage the gas connection.
Any suggestions on how to loosen the nut?
Also, are such inspections really worthwhile in terms of trying to
extend the life of the water heater or am I best off leaving it all
I do mine with a long breaker bar and socket. Make sure the tank is
almost full, as the weight will help it keep from moving. I do think
it's a good idea to check it periodically, but if it's really frozen
and refuses to yield, then you could just leave it alone, which is
what probably 95% of peopel do.
You could also use an impact wrench, which would be better at breaking
Yes, if you are going to do it, make sure you get the new anode first and
that it fits.. With a tall tank, you'll have to get a curved anode, or one
made up of short sections, which are connected. I've only replaced a
straight one, but have seen pictures of other shapes.
Once you have it open, may want to disinfect the tank as well. Search the
net for instructions. All it takes is a gal of bleach.
As trader4 suggested: USE AN IMPACT WRENCH.
I've changed the anode rod twice on my current water heater. The first
time, with the factory-installed (A O Smith) anode rod, required about
one second with a cheap electric (corded) impact wrench (1 1/16" socket)
after using a generous dose of Liquid Wrench. I didn't need the impact
wrench for the second time since I had installed the anode rod
previously, tightly but not as tight as the factory.
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