Rheem Gas Heavy Duty Water Heater Models 265 Litre and 275 Litre - Manual (Page 10)

REGULAR CARE
10
SERVICING
For efficient operation the water heater should be serviced annually by your
nearest Rheem Service Department or their Accredited Service Agent. Only
genuine replacement parts should be used on this water heater.
Warning
: Servicing of a gas water heater should only be carried out by
authorised personnel.
In commercial applications where large volumes of hot water are used,
sediment may build up on the bottom of the cylinder and reduce the heating
efficiency. In extreme cases, particularly in areas of high water sediment,
draining and flushing out may be necessary. Contact your plumber to drain and
flush the water heater.