Usually, backflow preventers are considered only for commercial/industrial applications, but they also should be placed on residential service lines when the residence is used as a commercial establishment (e.g., hair salon, dog grooming, photo processing, etc.). There are three important components that must be considered for a water service entry line-the water meter, a local/remote reading device and a backflow prevention device. Sound confusing? It really should not be if the local municipality/utility has a set of regulations in place that clearly spells out how the water service is to be installed and what components are placed in the water service line as well as by whom and at what cost. Even water services for residential homes can be points of controversy under the right conditions.
The water service entry into a building can be simple or complex depending on the building and what it contains.
One-size-fits-all is not in the vocabulary of most water utilities when it comes to water service entry lines.
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