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Rain Bird 1800 45 PSI Pressure Regulated Spray Head with Check Valve 4 in. | 1804-SAM-P45

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Rain Bird 1800 45 PSI Pressure Regulated Spray Head with Seal-A-Matic 4”


  • Product Type: Spray Head
  • Check Valve: Seal-A-Matic (SAM)
  • No Nozzle (Flush Plug Only)
  • Pop-Up Height: 4 inches

Features & Benefits

Our top-of-the-line spray, including 45 psi in-stem pressure regulation and a built-in Seal-A-Matic™ check valve. Used with Rotary Nozzles, this combination improves performance and saves water

Rain Bird® 1800-SAM-P45 Series Spray Heads are ideal for use in areas with changing elevations. The built-in Seal-A-Matic™ (SAM) check valve saves water by eliminating low head drainage from spray heads located at the base of slopes or hillsides.

Trusted for over 30 years, 1800 Series Spray Heads have provided unmatched durability, reliability, and performance. Superior components and features make the 1800 Series Spray Head the spray head of choice for a wide variety of applications.

Meets the needs of spray body applications using Rotary Nozzles regardless of changing elevation or water pressures. Incorporates the 1800 Series SAM feature and regulates operating pressure at 45psi (3.1 bar).

  • Maintains constant outlet pressure at 45psi (3.1 bar) at varying inlet pressures. Maintains constant pressure regardless of the nozzle used.
  • Ensures maximum spray body and nozzle performance, even with varying inlet pressures.
  • Maintains constant pressure, regardless of nozzle used
  • Designed to maximize application efficiency when using Rotary Nozzles.
  • ”SAM-PRS-45” stamped on cap for easy identification and maintenance.
  • Five-year trade warranty.

Product Details

  • Regulates nozzle pressure to an average of 45 psi (3.1 bar) with inlet pressures of up to 70 psi (4.8 bar)
  • SAM capability: holds up to 14 feet (4.2 m) of the head; 6 psi (0.4 bar)
  • PRS models regulate nozzle pressure to an average of 30 or 45 psi (2.1 or 3.1 bar) with inlet pressures of up to 70 psi (4.8 bar)
  • Flow-by: 0 GPM at 8 psi (0.6 bar) or greater; 0.10 GPM (0.02 m³/h; 0.36 l/m) otherwise
  • Installation: bottom inlet only

Optional Feature Specifications:

When so indicated on the design, the 4”, 6”, or 12” high pop-up spray sprinkler shall also include a Seal-A-Matic (SAM) check valve and a 45 psi pressure regulating (P45) device. These units shall be identifiable from the top with ”SAM-PRS-45” markings on the cap.

The check valve shall prevent low-head drainage of up to 14 feet of head. The pressure regulating device shall prevent high pressure misting and undesirable performance of the nozzle stream by regulating the nozzle pressure to 45 psi for inlet pressures from 50 to 70 psi. Below 50 psi the pressure loss shall not exceed 6 psi. These models shall utilize the bottom inlet only.


  • ½” (15/21) female threaded inlets.
  • Body height:
    • 1804-SAM-P45: 6” (15 cm)
    • 1806-SAM-P45: 9⅜” (24 cm)
    • 1812-SAM-P45: 16” (40 cm)
  • Exposed surface diameter: 2¼” (5.7 cm)

Operating Range

  • Spacing: 2.5 to 24 feet (0.8 to 7.3m)∗
  • Pressure: 15 to 70 psi (1.0 to 4.8 bar)

Operating Range

  • Spacing: 2.5 to 24 feet (0.8 to 7.3m)∗
  • Pressure: 15 to 70 psi (1.0 to 4.8 bar)

∗2.5 to 18 feet with standard Rain Bird Spray Head Nozzles (SQ, MPR, VAN, U-Series); 13 to 24 feet with Rain Bird Rotary Nozzles

More Information
Brand Rain Bird
Type Pressure Regulated Spray Head
Nozzle Connection Female Nozzles
Side Inlet No Side Inlet
Inlet Size 1/2 in.
Spray Body Height (in.) 6 in.
Check Valve SAM
Spray Head Spring Stainless Steel
Nozzle Installed No Nozzle (Flush Plug Only)
Spray Head Wiper Seal Co-Molded
Pressure Regulation P45
Application Residential and Commercial
Warranty 5 Years
Pop-Up Height 4 in.
Advanced Features Check Valve, PRS45
Brochure (1.63 MB)
Instructions (357.47 kB)
Specifications (401.19 kB)
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