AO Smith ECT-40 Residential Electric Water Heater DYNACLEAN DIFFUSER DIP TUBEHelps reduce lime and sediment buildup COREGARD ANODE RODDYNACLEAN DIFFUSER DIP TUBEHelps reduce lime PERMAGLAS GLASS COATINGCOREGARD ANODE RODDYNACLEAN DIFFUSER DIP TUBE CSA CERTIFIED and ASME RATED TandP RELIEF VALVE