13
15.
A hose retaining ring is supplied to
prevent the handset from dropping
below the spillover level of the bath
or shower, which could lead to
contamination from back-siphonage.
The supplied hose retaining ring should meet the majority of user requirements
for shower installations with flexible outlet fittings. However, there will be
occasions when the hose retaining ring will not provide a suitable solution. In
these instances an outlet double checkvalve
must
be fitted. This will increase
the required supply pressure typically by 0.1 bar.
Double checkvalves, fitted in the inlet supply to the appliance, cause a pressure
build-up, which could exceed the maximum static inlet pressure for the
appliance.
16.
Avoid layouts where the shower hose will be sharply kinked. This may reduce
the life of the hose.
25 mm minimum
Spillover Level
Hose Retaining Ring
