Suction Pipe Connection; Pressure Hose Connection - Graf 350021 Notice D'installation Et D'utilisation

4.4

Suction pipe connection

A 1" suction pipe is installed in an empty conduit that rises steadily without sagging or bending downward
to the connection at the mains water supply point. If this proves to be not possible then an air bleeding
valve must be installed at the highest point.
The connection to the back-up supply unit is by way of the 3 way switch-over and 1" rein-forced hose. The
installation of a shut-off valve in the suction pipe will make future maintenance work less complicated.
4.5

Pressure hose connection

The connection of the pressure pipe happens at the pressure and flow rate sensor. The further installation
to the various individual outlets etc is to be completed with commercial installation pipes (only plastic, use
no copper etc). A shut-off valve installed in the pressure lines make any future maintenance work less
complicated.
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4. Installation and assembly
Pressure hose 1"
outside threads
19 / 45
suction pipe 1"
outside threads
Wall duct