Questions and Answers about Plumbing, Backflow and Water Heaters
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You should contact
(a licenced and state certified backflow professional) to have this determined. However, These assemblies are required to be tested upon installation, after cleaning or repairs have been made and at least annually.
Commercial and industrial customers who have Double Check Valve Assemblies must have their devices tested semi-annually, as well as after installation and repairs or cleaning.
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