Diagram 5.5
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5 Water Systems - Sealed
5.17 Water Makeup
Provision should be made for replacing water loss from the
system using a make up bottle mounted in a position higher
than the top point of the system, connected through a non-re-
turn valve to the return side of either the heating circuit or the
hot water cylinder.
Alternatively, provision for make up can be made using a
lling loop.
5.18 Filling a Sealed Water System
Provision for lling the system at low level must be made, see
diagram 5.5. There must be no permanent connection to the
mains water supply, even through a non-return valve.
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