Yes. Older and oddly built systems are a big part of what Revive does. Brad and Joe each have more than 20 years on Spokane systems, and reviewers mention old systems they "always figure out and fix", hidden valve boxes found in minutes, and a poorly installed system upgraded with good coverage and zoning.
Older systems usually need three things: finding the valves (boxes get buried or covered by landscaping), tracing wiring that has been cut or patched, and replacing heads and nozzles so coverage is even again. If a system is past saving, we will tell you, and an addition or replacement gets a free estimate.
Go deeper: