The law requires that you notify your water provider before removing a backflow assembly. A water provider inspector will need to inspect the plumbing to verify the cross connection has been eliminated. A plumbing permit may be required to perform this type of work.
Plumbing permits are required for irrigation systems.
All irrigation systems supplied by privately owned water systems require a plumbing permit before installation. Piping and plumbing materials upstream of the backflow prevention assembly must meet State Plumbing Code standards. To learn about permits and standards for the City of Portland, call 823-7479.