Description
Water a long narrow strip from the middle without overspraying past either edge. The Rain Bird 15CST is the center-strip pattern of the 15-Series fixed-spray nozzle family — it throws a 4 ft × 30 ft rectangle (15 ft to each side of the sprinkler body), which is what you want when the sprinkler sits in the middle of the strip instead of at the edge. Drop it into any 1800-series pop-up body or shrub adapter, line up the spray axis with the strip, and you’ve got even coverage from the center out to both edges without watering the sidewalk or the curb lane.
Why Installers Pick the 15CST
- Center-strip throw pattern — 4 ft × 30 ft rectangle, 15 ft thrown to EACH side of the sprinkler body (vs. SST single-side and EST forward-only)
- MPR — Matched Precipitation Rate across the 5, 8, 10, 12, and 15 Series — zone all sizes together without overwatering the shorter throws
- Fixed spray, no moving parts — nothing to seize up or grind down under municipal grit
- Stainless steel adjustment screw — trim the flow and radius without slipping
- White inlet filter (.035″ × .035″ mesh) ships with the nozzle — keeps the orifice clean and the pattern crisp
- Fits all Rain Bird 1800 series pop-up bodies, 5000 series rotor bodies, and standard shrub adapters — drop-in retrofit on any existing Rain Bird head
Side-Strip vs. End-Strip vs. Center-Strip
- SST (15SST) — throws to ONE SIDE only (4 ft × 15 ft). Use when the sprinkler sits at the EDGE of the strip.
- CST (this product) — throws to BOTH SIDES equally (4 ft × 30 ft total). Use when the sprinkler sits in the MIDDLE of the strip.
- EST (15EST) — throws FORWARD only. Use when the sprinkler sits at the END of the strip and the water needs to go away from the body.
A typical hellstrip layout: ESTs at the two corners, CSTs along the middle, and SSTs filling any sharp jogs.
Where It Shines
- Hellstrips (between sidewalk and curb) where the sprinkler row runs down the middle of the strip
- Long perimeter beds along property lines and fences where the sprinkler heads can sit in the center of the bed width
- Mid-strip retrofits replacing center-pattern nozzles on existing 1800-series pop-ups
- Median strips and parking-lot islands where overspray onto pavement wastes water and creates slip hazards
Specifications
- Model: 15CST
- Series: 15 (MPR — Matched Precipitation Rate)
- Pattern: Specialty center strip (4 ft × 30 ft rectangle, both-sides throw centered on the sprinkler body)
- Nozzle radius: 15 ft per side (30 ft total throw width)
- Nozzle type: Fixed spray, no moving parts
- Inlet: Standard Rain Bird female nozzle threads — fits 1800 series, 5000 series, and shrub adapters
- Filter: White, .035″ × .035″ mesh, removable
- Adjustment: Stainless steel screw for flow and radius trim
- Operating pressure: 15–30 psi (1.0–2.1 bar); optimum 30 psi
- Construction: Glass-filled engineering plastic body, stainless steel adjustment screw
- Approximate weight: 1 lb per pack
- Warranty: Rain Bird trade warranty
Install Notes
- Unscrew the old nozzle, screw the 15CST on hand-tight — no Teflon tape needed (self-sealing female thread)
- Orient the nozzle so the spray axis runs along the strip — the body sits in the middle, water lands 15 ft to each side
- Trim the radius with the stainless screw — clockwise to reduce throw, counter-clockwise to open it back up
- Match the pressure to 15–30 psi — below 15 the pattern collapses, above 30 you’re misting and losing water to drift
- Zone the 15CST with other 15-Series and matched-precip MPR nozzles only — do not mix with rotor zones
Stop by Garoppo’s to pick one up, or order the count you need for the next install.