Rheem 850 Series Owner's Manual And Installation Instructions page 37

CONNECTIONS – PLUMBING
This water heater has either a plastic dip tube or fitting
liner in the inlet and outlet fittings (see diagram). These
must be in place for the water heater to function
properly. Do not remove or damage them by using
heat nearby. They will be pushed into the correct
position as the fitting is screwed in.
This water heater is intended to be permanently
connected to the water mains and not connected by a
hose-set. A braided flexible hose or semi-flexible
connector may be used for connection to the water
heater, where permitted by AS/NZS 3500.4.
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the water heater
should be the same size or bigger than the hot water line from the water heater.
The pipe sizing for hot water supply systems should be carried out by persons
competent to do so, choosing the most suitable pipe size for each individual
application. Reference to the technical specifications of the water heater and
local regulatory authority requirements must be made.
CONDENSATE DRAIN
This high efficiency model has a
condensate discharge outlet marked
'condensate drain' on the lower left hand
side of the water heater.
A drain line is recommended to be fitted
to the condensate discharge outlet to
carry the discharge clear of the water
heater. The drain line can be extended
using 16 mm rigid conduit. The pipe work
from the discharge outlet to the drain
should be as short as possible and fall all
the way from the water heater with no
restrictions.
The condensate drain line must not be connected to the temperature
pressure relief valve drain line but may discharge at the same point.
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