How much psi do you need to blow out a sprinkler system?
Do not stand over any irrigation components (pipes, sprinklers, and valves) during air blow out. Air pressure must not exceed 50 pounds per square inch (psi) for systems with polyethylene piping, and 80 psi for systems with PVC piping.
Set the compressor air pressure regulator to a maximum of 80 psi for rigid PVC pipe systems, or 50 psi for flexible black polyethylene pipe. Then turn off the water supply and set the system timer to open just one zone. Connect the other end of the air hose to the compressor and blow out the line.
- Multiply the square footage to be watered by .62 gallons or 1 inch of water per square foot. Example: 1,000 square feet x .62 gallons = 620 gallons. This tells you how many gallons of water you need to apply to the lawn. Divide that number by the GPM of your sprinkler, and you can figure how many minutes to water.
- Fire sprinkler systems are actually heat activated, one sprinkler head at a time, and most fires usually require only one or two sprinklers to be extinguished. Fortunately, the clever engineers who developed these systems designed them to reduce the damage to your property from water, smoke and fire.
- Fire sprinklers and smoke alarm systems are designed to activate according to different conditions. Sprinkler heads are individually heat activated, usually at 165°F. Smoke alarms, when activated, give only an audible warning sound; they do not cause fire sprinklers to flow water.
A professionally installed system for a typical ¼-acre lot is $3,000 to $4,000. You can DIY it for under $1,500. The heart of an underground system is pop-up sprinkler heads. When working, the heads raise up a few inches to spray water on your landscape.
- Prices for sod can range from eight to thirty cents per square foot, which brings the total of a 2,000 square foot project to $160 to $600. Delivery charges can vary from free (included in the sod price) to more than half the total cost of the sod. There is typically a minimum amount for delivery.
- The cost to install a drip irrigation system averages from $2.50 to $4.50 per square foot, depending on labor costs in your region. You can eliminate labor costs by installing it yourself.
- A professionally installed system for a typical ¼-acre lot is $3,000 to $4,000. You can DIY it for under $1,500. The heart of an underground system is pop-up sprinkler heads. When working, the heads raise up a few inches to spray water on your landscape.
Updated: 2nd October 2019