On Suburban water heaters, the Anode is REQUIRED. It is a sacrificial part that takes the hit for water induced corrosion. When you do your annual maintenance(Yes, you need to do this) you will see the rod has gone from about 3/4 diameter to les than 3/16 inch piece of rod. That shows it took the hit instead of the interior of the water heater. There is no good reason to have a spigot in place of the anode rod. It is not that hard to remove and reinstall. If the rod has been completely destroyed in a year you need to do a check every 6 months. Use this to seal the threads. Doug
https://www.homedepot.com/p/RectorSeal-1-75-oz-5-Pipe-Thread-Sealant-25790/100144191