(9) The installation height of raising pipe for drainage should be lower than 850mm. The
gradient from raising pipe towards drainage direction should be at least 1%~2%. If the
raising pipe is vertical with the unit, the raising height should be less than 800mm.
(10) Drainage pipes should have a downward slope of at least 1%~2%, in order to prevent
pipes from sagging; install hanger bracket at intervals of 1000~1500mm.
(11) The installation height of raising pipe for drainage should be lower than 850mm. The
gradient from raising pipe towards drainage direction should be at least 1%~2%. If the
raising pipe is vertical with the unit, the raising height should be less than 800mm., as
shown in Fig 4.3.5.
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