Quick answer: Sprinkler closing, sprinkler blowout, and sprinkler winterization are three names for the same fall service. Winterization is the whole job. The blowout is the step where compressed air pushes water out of the lines. Closing is what many people in Toms River and across the Shore call it.
Why There Are Three Names
The words come from different places. Irrigation contractors say winterization. Homeowners who have watched it done say blowout, because that is the part you can see and hear. And along the Jersey Shore, where pools, boats, and summer houses all get closed for the season, a lot of people say they need their sprinklers closed. If you search for any of the three, you are looking for the same appointment.
What Each Term Covers
| Term | What it means | Is it the whole job? |
|---|---|---|
| Winterization | Everything done to protect the system from freezing | Yes |
| Blowout | Using compressed air to push water out of each zone | No, it is one step |
| Closing | Shutting the system down for the season | Yes, when done properly |
| Draining | Opening drain valves and letting gravity empty the pipe | No, and rarely enough here |
What a Complete Winterization Includes
- Shut off the irrigation supply at the valve where the system connects to the house plumbing or the well.
- Drain the backflow preventer and leave its test cocks open at 45 degrees. This brass assembly sits above ground and is the first part to freeze.
- Blow out every zone with a high-volume compressor until the heads throw mist instead of water.
- Repeat the full sequence two to three times, because water settles back into low spots after the first pass.
- Shut down the controller or put it in winter mode so it does not try to run dry zones.
If a service skips step 2 or step 4, the system has been blown out but not winterized.
Why Draining Alone Is Not Enough
Some systems have manual or automatic drain valves at the low points. They help, but pipe in Jersey Shore yards is rarely graded evenly enough to drain completely, and drains do nothing for the water sitting in valves, heads, and the backflow preventer. The compressed-air step is what clears those.
Questions to Ask Before You Book
- Do you cycle every zone more than once?
- Do you drain the backflow preventer, or only the lines?
- What size compressor do you use? Volume of air matters more than pressure. See our blowout PSI and CFM guide.
- Are you a licensed irrigation contractor in New Jersey?
- Will you tell me about broken heads or leaking valves you find?
What About “Opening”?
The spring visit goes by several names too: opening, startup, turn-on, or activation. It is the reverse process, done slowly so full pressure does not hit empty pipe all at once. See seasonal turn-ons and startups.
Whatever You Call It, Book It by Mid-October
The window at the Jersey Shore runs from about October 15 to November 15. For Toms River, see our Toms River winterization and blowout page. For everything else, see the winterization and blow-out service page or the winterization FAQ. Call or text 609-548-5187.