Rain Bird XFS0918500 provides built-in 0.9 GPH emitters every 18 inches for subsurface irrigation beneath turf, shrubs and groundcover. Copper Shield technology protects the emitters from root intrusion. Choose the 500 ft. coil for a layout designed around this flow rate and spacing, then divide it into laterals that meet the XFS hydraulic limits.
Key Features
Factory-installed pressure-compensating emitters: 0.9 GPH each at 18-inch intervals.
Copper Shield root-intrusion protection at the emitters.
Copper-over-black polyethylene tubing with a flexible construction.
Accepts Rain Bird XF insert fittings, Easy Fit compression fittings and suitable 17 mm insert fittings.
Common Uses
Subsurface turfgrass irrigation.
Buried drip irrigation for shrub and groundcover beds.
Repairs and additions to XFS zones designed for 0.9 GPH emitters and 18-inch spacing.
Tubing: copper-colored exterior over black inner layer
Dimensions
Coil length: 500 ft. (152.4 m)
Outside diameter: 0.634 inch
Inside diameter: 0.536 inch
Wall thickness: 0.049 inch
Emitter spacing runs along the tubing; it is separate from the distance between lateral rows.
Compatibility & Installation Notes
Use the XFS design guide to select burial depth and row spacing for the soil and planting area. Provide 120-mesh filtration, suitable pressure regulation, flush access and air/vacuum relief at system high points as specified for XFS. Check the lateral-length table for the actual flow, spacing and inlet pressure. Pressure compensation does not eliminate friction loss or elevation limits, and a 500 ft. coil is not an unrestricted single-run rating. Installation components are separate.
Frequently Asked Questions
Is 0.9 GPH the flow of the entire coil?
No. Each built-in emitter is rated at a nominal 0.9 gallons per hour. Calculate zone demand from the total number of operating emitters.
Does 18-inch emitter spacing also set the row spacing?
No. Emitter spacing is measured along the tubing. Lateral row spacing depends on soil wetting and the planting layout.
Does Copper Shield replace filtration and flushing?
No. Copper Shield protects against root intrusion; filters still need cleaning, and the drip zone still needs flushing and inspection.
Why Buy from Big Frog Supply?
Choose XFS0918500 for a subsurface layout calling for 0.9 GPH emitters at 18-inch intervals. It combines Copper Shield root protection with wider emitter spacing than XFS0912500, so select it when soil wetting supports those intervals and use the matching XFS table to check run length at your inlet pressure.
Model: XFS0918500
Series: XFS subsurface dripline
Nominal emitter flow: 0.9 GPH per emitter
Emitter spacing: 18 inches
Operating pressure: 8.5–60 PSI
Required filtration: 120 mesh
Maximum water temperature: 100°F (37.8°C)
Maximum ambient temperature: 125°F (51.7°C)
Root-intrusion protection: Copper Shield technology
Tubing: copper-colored exterior over black inner layer
Coil length: 500 ft. (152.4 m)
Outside diameter: 0.634 inch
Inside diameter: 0.536 inch
Wall thickness: 0.049 inch
