Irrigation Pipe Replacement After 13 Years: Is It Necessary?

Contractor claims 13-year-old Nelson system main pipes need replacement plus 4 heads for poor coverage. No visible leaks. User spent money last year on a leaky valve. Questions diagnosis.

Pipe Lifespan Reality

Tony: "Nelson doesn't manufacture pipe... typical life span of PE (polyethylene) is about 10-15 years and Class 160 PVC even longer, as long as the system has been adequately winterized every year."

DIY System Audit Before Replacing

Tony suggests manual operation and checking:

1. Head-to-head coverage: Water from one head reaches adjacent head. Overlap compensates for single-head inefficiency.
2. Area coverage: Look for dry spots or overwatered areas.
3. Leaks: Run each zone 5-7 min; look for soft/mushy ground indicating underground leaks.

"Ultimately you are looking for good coverage to sustain your landscape... using the least amount of water possible - conservation is the key." Don't replace pipe without evidence of failure or hydraulic deficiency.