Most spray sprinklers have recommended operating pressures between 30 pounds per square inch (psi) and 45 psi. Operating a sprinkler system at a pressure higher than recommended can cause significant water waste, due to excessive flow rates, misting, fogging, overspray, and uneven coverage.
Pressures higher than 80 psi can possibly damage household appliances. Generally, the ideal pressure is 65 psi. A pressure regulating valve (PRV) can be used to reduce if the pressure is higher than 65 psi.
Normal sprinklers are rated for 175 psi. High pressure sprinklers are rated for 250 Globe HP ARE 300 psi. There may be others that go 300, but they are costly.
Most sprinklers are designed to work with a max pressure of 40psi while its possible you have 80 or 100 psi from a city water supply. I would install a pressure regulator in the system.
Average Water Pressure For A Sprinkler System
Water pressure is measured in pounds per square inch. For residential and small business applications manufacturers recommend 30psi at the head for sprays and 45 psi at the head for rotors. Larger heads will require higher pressure.
High water pressure can be caused by high supply pressure or changes in landscape elevation. High pressure can be managed by installing pressure regulators on the main line near valves that separate irrigation zones or sprinkler bodies that have internal pressure regulation.
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). Compressor must be capable of delivering 20 to 25 Cubic Feet Per Minute of air volume.
For spray heads, it is 30 psi, with an operating range of 15 to 30 psi. For drip lines, this is about 20 psi, with an operating range of 15 to 30 psi. Remember, flow rate and pressure are directly related to one another. If pressure is not well-controlled, irrigation efficiency will suffer.
The recommended PSI ratings for blowouts are not to exceed 50 PSI for general safety and efficiency. Never exceed this PSI when the system is using PVC piping, or you can crack the pipes. If nothing else, absolutely do not run any compressor higher than 80 PSI in your lines, or damage will be more than likely to occur.
Most sprinkler systems work at an optimal pressure of 30-50 psi, and most drip systems work best in the range of 20-40 psi. There are ways to adjust the pressure to suit your irrigation needs. The first step is to determine your water pressure.
Most residential plumbing systems are designed to handle 40 to 60 PSI of pressure, with 80 PSI being the typical maximum and anything over 100 PSI being possibly detrimental to plumbing components.
Definitions. Maximum Allowable Working Pressure (MAWP): The MAWP for a vessel is the maximum permissible pressure at the top of the vessel in its normal operating position at a specific temperature, usually the design temperature.
We recommend that you use 40 psi when designing your system. Example: if your sprinkler heads use 2.5 gpm @ 40 psi, then a ¾” service (20 gpm) could operate approximately 8 heads at one time. Based on this example calculation, you would not have more than 8 heads on at one time.
Anything over 80 psi is considered too high and could damage your plumbing system. On the other end of the spectrum, anything below 40 psi is considered low pressure, and anything below 30 psi is considered too low.
If you tighten the screw the water pressure will be more and if you loosen the screw the water pressure will be less. Turn the screw clockwise to tighten it and increase the pressure, or turn it counterclockwise to decrease the pressure. Do not be too hasty.
Fortunately, adjusting a spray head is pretty simple, in most cases. At the top of most spray nozzles is a small screw that is used to adjust the head itself. Using a small screw driver, you'll need to either tighten or loosen this adjustment screw to achieve your desired results.
Install a Pressure Regulator: Pressure regulators are usually installed close to where the system's mainline connects to the water supply. The pressure regulator thus helps reduce pressure everywhere, and not just for irrigation systems, but also for household appliances that need water to run.
Pressure-Regulated to 30 & 40 PSI. Hunter's pressure regulated pop-up sprays are calibrated for the needs of any installation. The PRS30 with the brown cap optimizes performance of traditional sprays at 30 PSI.
This will primarily be determined by the total flow rate and pressure you have available at your source. For example, you generally have a flow rate of 10 gpm from a ¾-inch spigot where you connect your hose. With your 10 gpm flow rate at your spigot, you could run two sprinklers at 5 gpm each.
The average water pressure for most homes and businesses is between 30 psi and 50 psi; most sprinkler systems are designed to use pressures of around 30 psi. You can measure the water pressure at your site with a flow meter or water gauge attached to an outdoor faucet.
Sprinkler systems: 150psi at the connection b. Standpipe systems: 150psi ± 5psi per floor elevation up to 9 floors; 200psi for 10 floors and above c. Minimum desired fire flow of 500gpm for any system.