The Aqualine I75A-532 is a heavy-duty, brass impact sprinkler built for serious irrigation applications — large residential lawns, commercial landscapes, pastures, hay fields, alfalfa fields, and small agricultural operations. Unlike plastic rotors that wear out, crack, or clog over time, this sprinkler is constructed from rugged brass, bronze, and stainless steel — materials proven to hold up season after season in the field.
The "A" in the model name stands for adjustable: a stainless steel, tamper-resistant arc adjustment collar lets you dial in coverage anywhere from 20° to 340°, making it ideal for corners, edges, irregular shapes, and full-coverage lawn zones alike. The dual-nozzle design — a 5/32" primary nozzle paired with a 3/32" secondary nozzle — provides both long-range coverage and close-in fill. An adjustable stainless steel deflector plate gives you direct control over throw distance, while an adjustable stainless steel breakup pin lets you soften the stream into a gentler, more rain-like pattern when needed. The anti-backsplash impact arm reduces side splash for a cleaner, more uniform water distribution pattern.
At 25–60 PSI, the I75A-532 delivers a throw radius of 41 to 44 feet and a flow rate of 3.7 to 5.3 GPM (with the 5/32" nozzle), with a recommended head spacing of 42 to 60 feet. The water stream peaks at 9 feet above nozzle level, giving it the height to clear vegetation and reach the outer edges of wide coverage zones even in low-wind conditions. Its straight-through flow path means minimal pressure loss through the head itself — especially important in longer lateral runs.
This sprinkler is typically riser-mounted on a 3/4" NPT threaded riser or swing joint. It is the adjustable-arc companion to the Aqualine I75-532 Full Circle Impact Sprinkler, which is fixed at 360° for dedicated full-circle zones. If your system requires a smaller inlet, see the Aqualine I50A-532 1/2" Adjustable Impact Sprinkler. For very large-scale agricultural or commercial irrigation, step up to the Aqualine I100A 1" Impact Sprinkler.
| Specification | Details |
|---|---|
| Model | I75A-532 |
| Inlet Size | 3/4" NPT (Female) |
| Nozzle Configuration | 5/32" primary nozzle + 3/32" secondary nozzle (dual nozzle) |
| Adjustable Arc | 20° to 340° |
| Throw Radius (5/32" nozzle) | 41' – 44' (pressure-dependent) |
| Flow Rate (5/32" nozzle) | 3.7 – 5.3 GPM |
| Operating Pressure Range | 25 – 60 PSI |
| Recommended Head Spacing | 42' – 60' |
| Max Stream Height | 9 ft above nozzle level |
| Arc Adjustment | Tamper-resistant stainless steel collar |
| Deflector Plate | Adjustable stainless steel (for distance control) |
| Breakup Pin | Adjustable stainless steel (for stream break-up) |
| Drive Mechanism | Impact drive with anti-backsplash arm |
| Drive Spring & Trip Assembly | Stainless steel |
| Body Construction | Brass, bronze, and stainless steel |
| Flow Path | Straight-through (low pressure loss) |
| Brand | Aqualine |
What is the difference between the I75A and the I75 (non-adjustable)?
The I75A is the adjustable-arc version of the I75. It features a stainless steel arc adjustment collar that lets you set coverage anywhere from 20° to 340°, making it ideal for corners, edges, and irregular areas. The I75-532 is fixed at 360° full-circle rotation and is best suited for open zones where complete circular coverage is always needed.
What does the "532" in the model number mean?
The "532" refers to the nozzle configuration: a 5/32" primary nozzle and a 3/32" secondary nozzle. The primary nozzle drives the bulk of the throw and flow, while the secondary nozzle provides additional close-in coverage. Aqualine also offers the I75A with other nozzle combinations (3/16" x 3/32" and 11/64" x 3/32") for higher flow and longer throw distances.
Can I adjust the arc after installation?
Yes. The tamper-resistant stainless steel arc adjustment collar can be set before or after the sprinkler is mounted on the riser. Simply rotate the adjustment collar to the desired left and right stop positions. Arc settings between 20° and 340° are supported.
What does the adjustable breakup pin do?
The stainless steel breakup pin intercepts the water stream as it exits the nozzle, breaking it up into a softer, more diffuse spray pattern. This is useful when you want more rain-like coverage near the head rather than a hard concentrated stream. Pulling the pin out of the stream restores maximum throw distance.
What does the adjustable deflector plate do?
The stainless steel deflector plate allows you to reduce the throw radius without changing the nozzle. Sliding it into the stream angle deflects water downward, shortening the reach. This is helpful when you need to reduce overlap between adjacent heads or avoid watering paths, fences, or structures.
What pressure does this sprinkler require?
The I75A-532 is rated for 25 to 60 PSI. For best performance and uniform coverage, operate within this range. If your supply pressure exceeds 60 PSI, we recommend installing a pressure regulator upstream to protect the drive mechanism and maintain consistent rotation.
How do I mount this sprinkler?
The I75A uses a standard 3/4" female NPT inlet. It is designed to thread directly onto a 3/4" male-threaded riser or swing joint. For permanent in-ground installations, use a swing joint or funny pipe to allow the sprinkler to deflect under foot traffic or equipment without damaging the lateral line. For above-grade temporary or portable setups, a standard schedule 80 threaded riser works well.
Is this sprinkler compatible with an irrigation timer or controller?
Yes. Pair this sprinkler with any irrigation timer or controller that operates solenoid zone valves. Impact sprinklers like the I75A are not pressure-regulated internally, so consistent zone pressure (25–60 PSI at the head) is important for reliable operation.
What is the California Proposition 65 warning about?
Like many brass irrigation products, the I75A carries a California Prop 65 warning for lead exposure. Wash hands after handling. For more information, visit P65Warnings.ca.gov.
Before you install, verify the following:
Pair your Aqualine I75A sprinklers with these essential components for a complete, reliable system:
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