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Angled view of Rain Bird 1804-SAM-P45 spray head showing 4 in. pop-up riser, threaded 1/2 in. inlet and plastic cap assembly for irrigation systems.

Rain Bird 1804-SAM-P45 4 in. Pop-Up Pressure-Regulating Spray

Brand: Rain Bird
Save 44%
$18.61
$10.47
SKU 1804SAMP45
In Stock (325)

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The Rain Bird 1804-SAM-P45 is a 4 in. pop-up spray body engineered for consistent, water-saving performance on sloped and mixed-elevation landscapes. It combines a built-in Seal-A-Matic (SAM) check valve with a 45 PSI in-stem pressure regulator to prevent low-head drainage and reduce misting while delivering steady nozzle pressure.

  • Built-in Seal-A-Matic (SAM) check valve prevents low-head drainage up to 14 ft and eliminates the need for under-head check valves.
  • 45 PSI pressure-regulating stem maintains consistent nozzle pressure for inlet pressures up to 70 PSI, reducing misting and overspray.
  • 4 in. pop-up height; 6 in. body height; 2 1/4 in. exposed diameter; 1/2 in. female threaded inlet. No nozzle included.
  • Durable UV-resistant plastic body with corrosion-resistant stainless-steel spring; all components removable from the top for fast servicing.
  • Co-molded pressure-activated wiper seal and heavy-duty retract spring provide reliable sealing and retraction across elevation changes.
  • Works with Rain Bird spray and rotary nozzles; specify nozzles separately to match radius and spacing requirements.

Ideal for residential and commercial irrigation where reliable pressure regulation and anti-drain protection are required. The 1804-SAM-P45 helps conserve water, improves system uniformity, and simplifies maintenance. Refer to Rain Bird technical documents for nozzle selection, flow-rate data, and warranty details.

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Frequently Asked Questions

What inlet size and connection does this spray body use?
The 1804-SAM-P45 uses a 1/2 in. female threaded inlet and installs from the bottom.
Does this head include a nozzle or come preinstalled?
No. Nozzles are sold separately; the body ships with a flush plug—select a Rain Bird nozzle for your spacing needs.
How does the SAM check valve and P45 regulator benefit performance?
The SAM check valve prevents low-head drainage up to 14 ft while the P45 maintains steady 45 PSI nozzle pressure to reduce misting and save water.

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