Installation Precautions
◆ Before formal installation, all pipes should be thoroughly flushed.
◆ Backflow preventer should be installed as horizontally as possible to facilitate debugging and maintenance.
◆ Maintenance gate valves should be installed at both ends of the backflow preventer, and filters should be installed before the inlet, and a flexible joint should be installed.
The drainage of the drain valve should be discharged to a drainage ditch on the ground, and the distance between the lower end of the drain valve and the ground should not be less than 300mm.
◆ The principle is bad. It is allowed to install the backflow preventer in the pit. If it is really necessary, it must comply with the corresponding local regulations; it is required to be installed in a suitable and isolated space by an approved technician; and to avoid flooding caused by the release of water.
◆ When the backflow preventer requires maintenance without water, two backflow preventers should be connected in parallel on the main pipeline.