Get the water out before it costs you a mainline.

The general rule locally is to have it done by November 1 if your backflow preventer sits above ground, and before the first hard freeze regardless. First frost in the Tri-Cities typically lands between late September and mid-October, with the first hard freeze usually arriving in late October or early November. Waiting until you see a freeze warning on the forecast is cutting it close, because that is also when every irrigation crew in the valley is booked solid.

Yes, and this trips people up every year. KID asks that you not blow out your sprinklers until the district has officially ended water delivery for the season. If you blow the system out while KID is still delivering, water simply flows back into your lines and you are back where you started, with the added risk of a freeze on lines you believed were empty. KID typically turns water back on around April 1. If you are on KID, confirm the shutoff before scheduling.

Most Tri-Cities residential blowouts land somewhere between $55 and $140, driven mainly by zone count. A four-zone yard on a small city lot is at the low end. A ten-zone system on an acre in West Richland is at the high end. Compare that against a new system, which runs several thousand dollars, and against a single split mainline repair in April.

Sometimes. If your system was installed with manual drain valves at every low point and you know where all of them are, gravity draining can work. Many Tri-Cities systems, particularly older central Richland installs, have no drain valves at the low points at all, which means gravity will not empty them and compressed air is the only option. A shop compressor usually cannot move enough air volume to clear a full zone, and pushing too much pressure is its own way to break things.

Pressure is the part amateurs get wrong. The widely used limits are roughly 80 PSI maximum for rigid PVC and about 50 PSI for polyethylene pipe, and what actually clears a zone is air volume, measured in CFM, rather than pressure. Running high pressure through a system to compensate for a small compressor is how heads get blown apart and seals get cooked. Any contractor quoting you should be able to answer what CFM their machine puts out.

Water expands when it freezes. Trapped water splits PVC laterals underground, cracks valve bodies, ruptures the backflow assembly, and breaks the internals of pop-up heads. The damage is invisible until spring startup, when the yard floods. Replacing a full system runs several thousand dollars, and even a single mainline repair means digging up landscaping you already paid for.

Yes. Homeowners never pay us anything. We may be compensated by the licensed irrigation and landscape contractors we connect you with, which is how the service stays free on your side. You are never obligated to hire any of them.

Up to three local contractors who actually service your part of the Tri-Cities will reach out, usually within one business day. In blowout season, response times get longer the closer you get to the freeze, which is the single best argument for scheduling in September or early October instead of the last week of November.