How to winterize sprinkler system?

Properly Winterizing Sprinkler Systems in Charlotte

Winterizing sprinkler systems protects expensive irrigation investments from freeze damage that occurs when water remaining in lines freezes and expands. Charlotte's Piedmont region experiences winter temperatures dropping below freezing for extended periods, creating conditions where inadequately winterized systems suffer expensive ruptures and component failures. Proper winterization removes water from all system components and prepares infrastructure for spring operation. This preventive task typically costs $100-200 but prevents thousands in replacement expenses.

Winterization Timing and Preparation

Schedule winterization for late October or early November before first freeze (typically mid-November in Charlotte). Monitor weather forecasts and complete winterization before sustained freezing temperatures arrive. Professional irrigation companies typically offer winterization services; consult local providers for scheduling and cost estimates. Many system owners benefit from annual professional winterization rather than attempting DIY procedures requiring specialized equipment.

Winterization Process

1. Shut off water: Turn off system at main valve and allow pressure to dissipate
2. Drain static lines: Drain all water from supply lines using manual drain valves
3. Blow out lines: Use air compressor to force remaining water from all supply and lateral lines
4. Drain controller: Ensure controller battery maintains programming through winter
5. Valve protection: Close or remove anti-siphon valves to prevent moisture accumulation
6. Above-ground components: Disconnect and store above-ground sprinklers and hoses
7. Drain systems: Ensure all zones drain completely before system sits unused

Spring system startup requires flushing lines and verifying all components operate properly after winter dormancy. Schedule startup service concurrent with seasonal fertilization and pre-emergent application to optimize professional service visits.