11
1.9
The hose should be fi tted through the hose retaining ring to prevent the handset
from dropping below the spill-over level of the bath or shower, which could lead
to contamination from backsiphonage.
The hose retaining ring should meet
the majority of user requirements
for shower installations with fl exible
outlet fi ttings. However, there will be
occasions when the hose retaining
ring will not provide a suitable solution.
In these instances an outlet double
checkvalve, e.g. the Mira DCV-
H, must be fi tted, refer to section:
"Accessories"
. The inclusion of the
Mira DCV-H will increase the required
supply pressure typically by 10 kPa
(0.1 bar).
Caution!
Double checkvalves, fi tted
in the inlet supply to the appliance,
cause a pressure buildup, which could
exceed the maximum static inlet pressure for the appliance.
1.10
Avoid layouts where the shower hose will be sharply kinked. This may reduce
the life of the hose.
Spill-over
Level
25 mm
minimum
