(automatic system draining and inspection)
(blowing the system and inspecting for damage)
Cost to winterize a sprinkler system varies greatly by region (and even by zip code).
Get free estimates from sprinklers and irrigation professionals in your city.
The average cost of winterizing a sprinkler system is $60 - $65.
If you have an inground sprinkler system 1 and live in an area where temperatures regularly drop below freezing, it is a good idea to winterize your system each fall. Winterizing removes any water from the system so that when the ground freezes, your system is protected against expanding ice, cracks, and other damage.
Winterizing is a fairly quick and simple process that does not take long to carry out. Most people having their systems winterized pay around $60 to $65 for the system start to finish, which is a significant savings over having to make repairs come spring.
The reason that winterization is so important is that during an extended cold spell, which is a minimum of three days below 32º Fahrenheit, the ground your sprinklers are set in will freeze. This means any water trapped inside the pipes or sprinkler heads will also freeze. When water freezes, it expands. Over time, this causes cracks in your system, which can lead to leaks, burst heads, and expensive repairs.
So, the best time to winterize your system is before the first extended cold snap of the year. For most people, this means sometime during the late fall but varies depending on your climate. If your area frequently sees early frosts, it is a good idea to winterize early, while climates that do not see a freeze until later in the year can often wait a few weeks longer.
The goal of winterizing is to completely clear the system of any water. There are technically three methods for doing this, but most professionals agree that only blowing the system is effective.
Some systems have an automatic drainage setting, which allows water to drain from any high points once it is opened. The issue with this setting is that any low spots in the system may still contain some water, which can freeze and cause damage.
Manual systems also operate similarly. You open specific valves to let the water drain from the highest points in the system, but again, water may still collect and freeze in low areas.
Blowing the system, whether done DIY or professionally, is one of the only ways to guarantee that you have cleared all standing water. During this process, all valves are opened and between 50 and 80 pounds per square inch (psi) of compressed air is blown through the system, pushing any water out of the openings and clearing them.
After this point, all the water valves are shut off to prevent new water from entering the system as well as the controls that operate the flow. Once winter is over and the risk of freezing has passed, opening the valves and turning on the controls reactivate the system.
If you live in a warm climate that does not experience a ground freeze, there is no need to winterize your system. You may still want to have it blown out and inspected once a year anyway to make sure it is in good working order.
Most lawn care and irrigation specialists charge a flat rate for winterizing a system of between $60 and $65. This rate is good for up to 8 zones. If your lawn has more than that, specialists typically charge an additional $5 per zone.
This is the cost for blowing out the system using compressed air and giving it a cursory inspection to make sure it is working properly. This is the method recommended even for systems that have manual or automatic draining included.
When installing a sprinkler system 1, it is possible to have a self-draining system installed. This system allows the water in the pipes to drain naturally down a slope. However, it is still possible for water to collect in the low-lying areas, which could still freeze. It is recommended, therefore, that you have your self-draining system inspected if you choose not to have it blown out. This is a cost of $40 on average
You should winterize your sprinkler system if you live in an area that sees prolonged temperatures below 32º.
The average cost to winterize a sprinkler system is around $60 to $65.
To protect your sprinkler system from freezing, it is a good idea to have it winterized by having the water completely blown out of the pipes.
It takes roughly 3 days at temperatures below 32º for sprinkler pipes to freeze.
You should winterize your sprinkler system if you expect temperatures below 32º for 3 or more days straight.
In most areas, you should winterize your sprinkler system in late fall before the first extended period of temperatures below 32º.
Cost to winterize a sprinkler system varies greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.