I have a 57 y.o female friend who has 20 rental units in CA that she performs most of the maintenance and remodeling for 30 years. She only installs Bradford White water heaters, all which have the anode rod under the hot water outlet. A few years ago she heard about anodes and started replacing the anode rods every 2 1/2 - 3 years with the "flexible" or articulated magnesium rods due to the low clearance height. The original full length rod had to be cut, with a caution of producing a spark if the gas is not turned off! (or some were corroded down to the core wire which flexes easily). Armed only with a pipe wrench and occasional pipe extending it to be a breaker bar, she has been able to do this alone. She only drains a gallon of water after turning off the cold inlet, relieves some pressure by turning on a hot water faucet indoors. This keeps the weight of the water heater; only once did someone else need to help stabilize from rotation. All of her heaters are strapped. This inspired me to look into my 12 year old Rheem, my fathers 8 year old AO Smith, and my sisters 10 year old Bradford White: none currently leaking. We called appliance service repairmen (25 - 35 yrs experience/careers): none had EVER changed one. We called our plumber of 15 years. The owner stated unless we had changed the anode at least every 2 - 3 years (with proof) since new installation, they WOULD NOT perform it (at any cost/rate). Due to newer climate/environmental regulations, only low-NOx heaters can be installed in CA which currently run in the $1000 + plumber installation costs= $1800- $2000 for a new gas heater. I still have my Owners Manual. Guess what? Under the Owners responsibility it states that annual flushing and inspection of the anode rod is OUR responsibility. I have pipe wrenches, crescent wrench, channel locks but only a 1/4" drive socket wrench and impact wrench. I ordered (H.Depot) $65: Tekton 1/2" drive x 14" flex head Ratchet and Tekton 1/2" drive 1 1/16" Deep 6 point socket (6 pts has more metal between the teeth to withstand higher torques) This set up with a 20" pipe slid over the ratchet handle for a breaker bar was sufficient to remove the hex bolt anode in my Rheem and Fathers AO Smith. We had to move back and forth (with some muscle force) to loosen at first. The 14" pipe wrench with a 20" pipe over the handle was required to remove the AO Smith nipple-combo-anode rod. End of story. 2 60+ y.o females with 1 93 y.o Father changed 3 anode rods in 3 different models in 3 weeks. We did move the vent hood for more access. It is recommended to flush the tank AFTER changing a corroded rod as some of the deposits may loosen from the rod as it is pulled out of the hole. Next post will show my pictures of what the rods removed looks like!.