Hi Guys, i'm curious, after installing a new hot water cylinder for your clients do you let them know the sacrificial anode needs looking at every few years? Maybe even worth making it a "regular maintenance schedule" to also check the valves etc ... All for the sake of safety and long durability.. 

Linkback: https://www.plumbers.nz/q-and-a-hot-water-cylinders/44/sacrificial-anode-in-every-hot-water-cylinder/1226/

i would have to say no too!, how many cylinders besides dux have anodes?? and i would count on two hands the amount of storage cylinders we fit theses days.
regards

It gets more complicated, not all anodes are created equally, different material for different water types.
Kapiti's water amongst others (when our bores are running during dry weather) is classed as aggressive. Therefore a stronger anode is required, it's been a few years since I've looked into it, and I may be wrong, but Rheem make 3 types of anode, color coded, I forget exactly, but magnesium for normal water and a solid aluminum anode? (this is where I may be wrong) for aggressive water, and some random alloy mix for in between water.