[JRTJH]

While I will "extoll the virtues" of using the right tool for any job, I don't usually have a "special for one purpose only tool" always available. So, I typically use/devise alternatives that are commonly available.

There's no need to go buy a special sized socket. You can use "commonly available tools to remove the anode rod. If you have a crescent wrench (adjustable wrench) and a wrench that will fit its handle (or another smaller size crescent wrench) you can easily remove the anode.

Adjust the crescent wrench to span the anode, place it on the top of the anode and use the other wrench to apply torque to the handle to loosen or tighten the anode. You'll need to reposition the wrench on the anode to maintain clearance as you unscrew it from the tank. Reinstalling the anode is just the opposite, but ALWAYS (did I mention always) use fresh teflon tape on the threads.

Here are a couple of photos depicting how to place the crescent wrench.