Professional irrigation winterization across DC Metro — protect your system before the freeze.
DC Metro’s winters reliably deliver multiple hard freezes. Water remaining in irrigation lines, valves, and backflow preventers when temperatures drop below 32°F expands as it freezes — cracking pipes, splitting valve bodies, and damaging the backflow preventer. Repair costs for freeze damage run $500 to over $2,000. Professional winterization is a fraction of that — and eliminates the risk entirely.
Main irrigation water supply shut off, controller set to off/rain mode.
Appropriately sized commercial compressor connected to system.
Each zone activated individually while compressed air is pushed through; multiple passes per zone to clear all water.
Manual drain valves opened, backflow preventer drained and confirmed clear.
Note any heads, valves, or components showing wear for spring startup attention.
Call Oseas for a free estimate — honest assessment, no pressure.