Rain Bird - 1800 Series 4" Spray Head with PRS & SAM - 45 PSI - No Nozzle
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Rain Bird - 1800 Series 4" Spray Head with PRS & SAM - 45 PSI - No Nozzle

SKU: 1804SAMP45

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  • Manufacturer Pack Size = 75. Pallet Size = 1800
  • Must order in QTY of 75. Priced Individually.
  • 4” 1800 Series pop-up spray head with Rain Bird® Flow Optimizer™ Technology and Seal-A-Matic™ Check Valve
  • Patented PRS pressure regulator built into the stem
  • Restricts water loss by up to 70% if nozzle is removed or damaged
  • Designed for use with all Rain Bird plastic spray head nozzles
  • Provides 45 PSI in-stem pressure regulation for maximizing efficiency or Rotary Nozzles
  • Includes Seal-A-Matic™ check valve preventing low head drainage of up to 14’ of head
  • Nozzle not included

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.

Co-molded, pressure-activated, multi-functional wiper seal assures positive seal without excess “flow-by” which enables more heads to be installed on the same valve.


  • Maintains constant outlet pressure at 45 PSI. Ensures maximum nozzle performance, even with varying inlet pressures. Maintains constant pressure regardless of nozzles used.
  • Unlike competitive PRS sprays, Rain Bird PRS sprays adjust to fluctuating pressure, optimizing flow and promoting a more consistent spray pattern.
  • Ensures consistent performance throughout zone if nozzle is removed or damaged. Keeps plant life covered by other spray heads properly irrigated.
  • Ends misting and fogging caused by high pressure. Stops water waste. Ensures necessary watering occurs in high pressure or wind conditions.
  • Built-in Seal-A-Matic™ (SAM) check valve. Eliminates the need for under-the-head check valves. No parts to be installed at the site.
  • Traps water in lateral pipes in elevation changes of up to 14’ (4,2 m). Reduces wear on system components by minimizing water hammer during start-up.
  • Prevents drainage from spray heads at lower elevations. Stops water waste. Ends landscape damage due to flooding and/or erosion.
  • All sprinkler components are removable from the top without special tools, providing for quick and easy flushing and maintenance of the sprinkler.
  • Constructed of time-proven UV-resistant plastic and corrosion resistant stainless steel parts, assuring long product life.
  • “SAM-PRS” stamped on cap for easy identification and maintenance.


  • Regulates nozzle pressure to an average 45 psi (3.1 bar) with inlet pressures of up to 70 PSI (4.8 bar)
  • SAM capability: holds up to 14’ (4.2 m) of head; 6 PSI (0.3 bar)
  • Flow-by: 0 at 8 PSI (0.6 bar) or greater; 0.1 gpm (0.02 m3 /h; 0.006 l/s) otherwise
  • Installation: bottom inlet only

Operating Range

  • Spacing: 13-24’ (4.0 to 7.3 m)
  • Pressure: 25-70 PSI (1.7 to 4.8 bar)