Fire Sprinkler System Backflow Preventer Diagram

Backflow prevention fire safety systems connected to a public water supply will require a backflow prevention device between the fire safety system and the public.

Fire sprinkler system backflow preventer diagram. Hose connection vacuum breakers are best removed drained and stored for the winter. Preparing your sprinkler system for winter for details. Many agencies concerned with water quality issues however favor a double check valve assembly or a reduced principle backflow preventer device rpbd because they feel that this added degree 3. Backflow prevention for fire sprinkler systems.

Sprinkler system backflow prevention devices are safety mechanisms to prevent contaminants from entering water supplies. Type of application the type of application and industry such as fire protection irrigation waterworks and plumbing each have particular requirements. Backflow prevention devices will be damaged by freezing during the winter unless drained of all water. Backflow prevention systems are devices installed onto a pipe that only allow water to flow in one direction.

Automatic fire sprinkler systems consist of an arrangement of piping installed throughout the building that is designed to supply a sufficient amount of water under pressure to an open sprinkler head. It is similar to a hose bib on your garden hose. Fire sprinkler systems may require detector assemblies and irrigation. See 4 719 home sprinkler systems.

From the water main into the sprinkler system. Plumbing codes mandate that potable water supplies be protected against backflow at all cross connections. In fact there is a mini backflow preventer on the nozzle that makes water squirt out the sides rather than shoot back. Think of it as a one way gate that allows water from the city s public water supply to flow into your home s piping but stops water if and when it ever tries to flow backwards into.

Nfpa 25 backflow preventors section 9 6. Backflow preventers the risks to drinking water quality from backflow contamination incidents pose a constant threat whether they re nuisance non health hazards or serious public health events. Irrigation backflow devices are designed for installation on potable water lines to protect against both back siphonage and backpressure of contaminated water into the potable water supply. Ames fire waterworks excellence matters specify it our compact lightweight solutions are designed to meet the needs of fire protection and waterworks systems and are engineered to keep things flowing so you can focus on protecting what matters most.

A simple and low cost version of a backflow preventer is the single check valve scv which has been used on sprinkler systems since the early 1800 s. A backflow prevention system prevents backflow.