CALEFFI 574 series Manuale - Pagina 4

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Installation

The installation of backflow preventer should only be carried out by qualified personnel in accordance

with applicable codes and regulations.

The backflow preventer includes an upstream and downstream shut-off valve.

Install the unit in an accessible area which is not susceptible to accidental flooding. The equipment

is to be installed horizontally only. The air gap, complying with the ASSE 1013 standard, must be

connected in accordance with local codes. See page 9 and 10 for discharge extension pipe size and

type, sourced separately.

Before installing the backflow preventer the pipe should be cleaned with a high-capacity water jet.

In order to protect the public supply system the backflow preventer is installed after the water meter

and, to protect supplies for sanitary purposes in the internal system, it is installed where contamination

can take place, eg: centralized heating systems, garden watering systems etc.

Installation diagram

Back ow preventer valve

Shut-o valve

Discharge air gap

Discharge extension pipe* to sewer

Pipe

Sewer tunnel

GROUND, FLOOR, GANGWAY

*source extension pipe separately