This site is great. Wish I'd read about AO Smith reputation before installing one.... oh well. Model is GPSH 50 200. Hot water smells (like sulpher). No smell on cold water. I soften my well water. Mfr date is 7/2005. Installed late 2005. I have read recommendations on this site to leave anode alone, but feel I have to replace or add a second rod. Is it correct that original rod is not under either the water inlet or outlet? There was mention on this site of a sectional rod offered by AO Smith that installs below hot water outlet line. Can someone provide a part number or a link to the part? Expert guidance will be much appreciated.