Rain Bird FS100P 1-Inch PVC Tee Flow Sensor

Rain Bird FS100P 1-Inch PVC Tee Flow Sensor

Brand: Rain Bird | SKU: FS100P

Product Overview

Measure a 1-inch PVC irrigation line with the Rain Bird FS100P, then use the readings through a compatible controller and interface. Its impeller produces a flow signal, while the removable insert allows access for service. Check the expected watering flow against the 5.4–54 GPM suggested design range before selecting the sensor by pipe size alone.

Key Features

• 1-inch PVC tee with solvent-weld socket ends.
• Impeller flow sensing with a removable insert.
• Designed for outdoor or underground installations.
• Supports flow monitoring through the required compatible controller interface.

Common Uses

• Measuring flow in a compatible 1-inch PVC irrigation mainline.
• Providing flow input for configured monitoring, learned-flow or flow-management functions where supported by the control system.

Technical Specifications

• Model: FS100P; factory part: M80108.
• Nominal pipe connection: 1-inch slip / solvent-weld socket ends.
• Suggested design flow range: 5.4–54 GPM.
• Meter body: Schedule 40 PVC tee with solvent-weld socket ends.
• Model-specific pressure rating: up to 150 psi at liquid temperatures up to 73°F, or up to 75 PSIG at liquid temperatures up to 110°F.
• Sensing method: impeller; removable sensor insert.
• Output: frequency signal proportional to flow.
• Calibration K-factor: 0.2611; offset: +1.2000.
• Installation location: outdoor or underground, with access for service.
• Straight-pipe requirement: at least 10 pipe diameters upstream and 5 downstream.
• Sensor and tee assembly; controller, interface, valves and installation materials are separate.

Dimensions

• Manufacturer-listed width: 3.50 inches.
• Manufacturer-listed height: 3.94 inches.

Compatibility & Installation Notes

Size the sensor for the actual station flow range as well as the pipe connection. Select the correct model in the controller or interface, or enter its exact K-factor and offset when custom calibration is required.

Provide at least 10 pipe diameters of straight, unobstructed pipe upstream and 5 downstream. Point the tee’s flow arrow in the direction of water flow; in a horizontal pipe, keep the tee upright.

Remove the sensor insert before solvent-welding the PVC tee. Keep it clean, follow the cement manufacturer’s curing instructions, then reinstall the insert and retainers as directed by Rain Bird.

For ESP-LXD, use the appropriate sensor decoder on the two-wire path; Rain Bird currently lists SD211TURF as the replacement for SD210TURF. ESP-LXMEF connects through its Flow Smart Module. Other supported systems need their specified interface; these parts are separate.

Preserve red/black signal polarity and use suitable waterproof splices. Set up and test the controller’s flow functions after installation. The sensor reports flow; shutoff and alarm behavior depend on the configured controller and valves.

Frequently Asked Questions

Does FS100P have threaded pipe ends?

No. FS100P has 1-inch PVC slip / solvent-weld socket connections. It is different from a threaded brass or international BSP sensor.

What flow range should I use for selection?

Rain Bird gives a suggested 5.4–54 GPM design range for FS100P. Check the actual station flows as well as the pipe size.

How much straight pipe does it need?

Allow at least 10 pipe diameters of unobstructed straight pipe upstream and 5 downstream.

Will the sensor shut off water by itself?

No. It sends flow information to the compatible control system. Any automatic shutoff or alarm requires the appropriate interface, controller setup and operating valves.

Why Buy from Big Frog Supply?

Choose FS100P when a 1-inch solvent-weld connection and a 5.4–54 GPM suggested flow range suit the irrigation line. Its Schedule 40 PVC tee differs from the larger Schedule 80 FS150P and FS200P models, and the removable insert provides service access without replacing the whole tee. Confirm both the low-flow watering demand and the controller interface so the sensor can supply useful readings for the intended zones.