Sprinkler System Spring Startup: How to Prepare Your Irrigation System for the Season
Mar 10th 2026
The Hunter Pro-Spray PRS30 is a pressure-regulated pop-up sprinkler body engineered to deliver water at a constant 30 PSI — the optimal pressure for standard fixed-arc and adjustable spray nozzles. Available in 4" and 6" pop-up heights with a ½" NPT inlet, this EPA WaterSense® certified body is a go-to choice for residential and commercial irrigation systems where consistent, efficient coverage is a priority. Whether you're installing a new system in a tight backyard or retrofitting an older one with pressure regulation, the Pro-Spray PRS30 offers a simple, cost-effective upgrade that immediately improves uniformity and reduces water waste.
What makes the PRS30 stand out from a standard, non-regulated spray body is its built-in pressure regulator, which holds incoming water pressure at a steady 30 PSI regardless of fluctuations in your supply line. The body operates across a wide 15 to 100 PSI range, making it compatible with virtually any residential or commercial supply. This is critical in systems where pressure varies across zones or where municipal supply pressure exceeds the optimal range for spray nozzles — conditions that typically cause misting, fogging, and uneven distribution. The PRS30 eliminates those issues by stabilizing pressure at each head individually. The brown cap provides instant field identification, distinguishing it from non-regulated Pro-Spray bodies and the gray-capped PRS40 (designed for MP Rotator nozzles). The heavy-duty body handles foot traffic and high inlet surge pressures reliably. An innovative co-molded wiper seal — made from two types of chemical- and chlorine-resistant materials — keeps the riser operating smoothly and prevents debris from entering when retracted. For added protection against water waste, factory-installed options include FloGuard™ Technology (available on check-valve models), which reduces output to a trickle if a nozzle goes missing, immediately flagging the issue in the field.
The Pro-Spray PRS30 is compatible with the full range of Hunter Pro Fixed and Pro Adjustable spray nozzles as well as all industry-standard female-thread nozzles. If your system uses MP Rotator nozzles, note that a PRS40 body (calibrated to 40 PSI) is the correct choice for that nozzle type — check with Hunter Industries or your local distributor for availability. If low-head drainage on slopes is a concern, check valve versions of the PRS30 are available through Hunter's distribution network. Need to automate the zone? DripWorks carries a full selection of compatible irrigation timers and controllers.
| Specification | 4" Model (PROS04PRS30) | 6" Model (PROS06PRS30) |
|---|---|---|
| SKU | PROS04PRS30 | PROS06PRS30 |
| Pop-Up Height | 4" | 6" |
| Overall Height (Retracted) | 6.75" | 8.75" |
| Diameter | 2.25" | 2.25" |
| Inlet Size | ½" NPT (Female) | ½" NPT (Female) |
| Regulated Outlet Pressure | 30 PSI | 30 PSI |
| Operational Pressure Range | 15 to 100 PSI | 15 to 100 PSI |
| Cap Color | Brown (field ID) | Brown (field ID) |
| Nozzle Compatibility | Hunter Pro Fixed, Pro Adjustable & all industry-standard female-thread nozzles | Hunter Pro Fixed, Pro Adjustable & all industry-standard female-thread nozzles |
| Wiper Seal | Co-molded, chemical & chlorine-resistant | Co-molded, chemical & chlorine-resistant |
| Body Construction | Industry's strongest spray body; heavy-duty construction | Industry's strongest spray body; heavy-duty construction |
| Certifications | EPA WaterSense® Certified | EPA WaterSense® Certified |
| Brand | Hunter Industries | Hunter Industries |
| Nozzle Included | No – nozzle sold separately | No – nozzle sold separately |
What does "PRS30" mean, and why does pressure regulation matter?
PRS stands for Pressure Regulating Spray. The "30" refers to the outlet pressure the built-in regulator maintains — 30 PSI — which is the ideal operating pressure for standard fixed-arc and adjustable spray nozzles. Without regulation, high supply pressure causes nozzles to mist and fog instead of projecting a clean arc, resulting in uneven coverage and significant water waste. The PRS30 solves this at the head level, so every sprinkler in the zone delivers water the same way regardless of supply pressure variation.
What is the difference between the PRS30 and the standard (non-regulated) Pro-Spray body?
The standard Hunter Pro-Spray body (without PRS designation) has no built-in pressure regulator — it passes whatever pressure is in the lateral line directly to the nozzle. The PRS30 adds an internal regulator that reduces outlet pressure to a constant 30 PSI. If your system pressure is consistently within the optimal range for spray nozzles (25–30 PSI), a standard body works fine. If your pressure runs higher — which is common in many municipal water systems — the PRS30 is strongly recommended to prevent misting and improve distribution uniformity.
What is the difference between the PRS30 (brown cap) and PRS40 (gray cap)?
Both are pressure-regulated Hunter spray bodies. The PRS30 regulates to 30 PSI and is optimized for traditional fixed-arc and adjustable spray nozzles. The PRS40 regulates to 40 PSI and is designed specifically for Hunter MP Rotator nozzles and similar rotary nozzles, which require higher pressure to operate correctly. If your system uses standard spray nozzles, use the PRS30. If you are using MP Rotators, use the PRS40. The brown vs. gray cap makes it easy to distinguish them in the field.
Should I use the 4" or 6" pop-up height?
The choice depends on the ground cover around the head. In typical lawn turf, a 4" pop-up is usually sufficient. In areas with taller ground cover, ornamental grasses, or dense shrub beds, the 6" pop-up ensures the nozzle clears the vegetation for unobstructed distribution. If the head is being installed as a shrub riser, Hunter also offers the PRS30 in a shrub adapter configuration.
Is the Pro-Spray PRS30 compatible with smart irrigation controllers?
Yes. The PRS30 is a standard ½" spray body and is fully compatible with any irrigation controller that operates standard solenoid valves — including smart controllers from Hunter, Rachio, Orbit B-Hyve, Rain Bird, and others. DripWorks carries a full range of irrigation timers and smart controllers that work seamlessly with this body.
Is the Pro-Spray PRS30 EPA WaterSense certified?
Yes. The PRS30 carries EPA WaterSense® certification, meaning it has been independently verified to meet stringent water-efficiency and performance standards set by the U.S. Environmental Protection Agency. Many state and local agencies now mandate the use of pressure-regulated spray heads to reduce landscape water use — the PRS30 helps comply with those requirements while saving water and improving coverage quality.
Before you install, verify the following:
Pair your Pro-Spray PRS30 bodies with these essential components for a fully functional spray zone:
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