Water heater question

Hello again everyone, I have another question. My Montana has a Suburban water heater and I’m wanting to replace the anode rod with one that has a drain made on it. It’s cold here in the NC mountains so I have to winterize every time we come for a weekend and I’d like to speed up the process. My problem is that the rod that’s in it now is about 8 inches long and all I can find with a drain are about 4.5 inches long. Other than having to replace it more often is there any reason I couldn’t use one like that? They both have 3/4 pipe thread. Thanks in advance for your help.