Manufacturers' Recommendations

Rheem and Vulcan Brand Water Heaters

Rheem recommend seven or eight years for their standard range and ten years for their long life models.

Rheem web site "frequently asked questions" page where you can read Rheem's recommendations about the replacement of sacrificial anodes.

Dux Water Heaters

The makers of Dux water heaters recommend replacement at five-yearly intervals for their domestic heaters and three years for commercial.

Dux web site. Dux home page. Once there, move your mouse pointer over 'FAQ's / Technical' and then click "Products Documents (pdfs)'. Owners Manuals from the drop-down box and then select your type of heater.

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