A person should be able to enter the room or space and close the shutoff valves within a matter of seconds without stopping to move anything or locate a ladder. Also, if the backflow prevention device is located inside a dwelling, it’s a good idea to consult a local inspector regarding Americans with Disabilities accessibility standards.

When installed outdoors, the double-check valve assembly must be enclosed. Removable covers are usually permissible. The last step in the installation procedure is to put all printed materials in a safe easy-to-remember location along with other irrigation literature. It will be useful in the future.

The steps for installing a double-check valve assembly overhead in an interior space are the same as for an inline (underground) installation except that access is provided differently, If the assembly is installed overhead, it should be located where nothing will be placed below it-no furniture, stacks of boxes, vehicles, etc.

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