Botanic Garden >> Gardening > >> Question and Answer >> Irrigation

Rain Bird 100-DV Valve Stuck On: Replace Valve Top, Not Just Diaphragm

6-zone system. Front yard zone 1 turns on during last cycle and won't shut off until manually turned off. User asks if 100-DV valve is cause, and whether to replace diaphragm (includes solenoid?) or entire controller.

Valve Is the Problem

Matt: "Well it sound as if the control valve is the problem. The simplest way is to replace the entire top of the valve which includes the solenoid and diaphragm. The diaphragm is a rubber piece that is just under the top. You will need to replace that separately, since it is not attached to the top part. PS Buy an entire valve, it's cheaper than the 2 parts separately."

The controller isn't the issue if only one zone sticks on. A valve that won't close mechanically (debris, torn diaphragm, stuck plunger) will run regardless of controller state.

Irrigation: Rain Bird ESP "SKIP" on Zones 8–10: Need Controller Model to Diagnose; Rain Bird ESP‑6: No 110 V Power at Controller – Transformer or Wiring Issue?; Irritrol 476PR Shows “1FUS” and Drains 9 V Battery in Days; Richdel 446PR Hybrid: Zone 2 Runs Continuously Even in Off Position; Toro Vision II: One Zone Shows 24V Constantly But Won't Water; Rain Bird to Orbit Controller – Master Valve Wire on Old Unit; Rain Bird 7RCBI Stops at Zone 1 – Discontinued, Replace with ESP; Rain Bird RC-7A Station Wheel Stopped: Motor or Switch Failed; Rain Bird ESP-6 Shows "8888": Controller Likely Dead, Replace with ESP-Modular; Diagnosing a Blown Fuse on a Rain Bird ESP-8 with a Master Valve

Garden Articles

Rain Bird ESP‑8SI “PR OFF” Error – Power Supply Check

Replacing Rain Bird RC-1260Bi Mechanical Controller with Digital Model

Toro Greenkeeper Zone Stuck On: Valve Failure, Not Controller

Rain Bird RC-1260BI Advance Motor Failure

Rain Bird SST with Hydrotek 4000: Need Pump Relay & Delay

Rain Bird ESP-LX Modular Raster Test Shows Open Circuits on MV, Valves 2 & 4

Irritrol KD-9 "Fuse" Display: Systematic Solenoid and Wiring Check

Plants

Hunter ICC: All Zones Show 26V Simultaneously—No Water Flow

Sprinkler Solenoid Testing After Controller Voltage Confirmed—Ohmmeter Method

Testing Valves After Lightning Strike on Rain Bird ESP-16LX: Use Raster Program or Manual Activation

Rain Bird PGA Valve Stays On: Beyond Solenoid and Diaphragm Replacement

Replacing Obsolete Rain Jet Valves: Compatible Options

Rain Bird RC-1260BI Zone 8 Not Activating: Solenoid, Wire, or Diaphragm?

Hardie Rain Dial (~15 Years) Only Runs Zone A – Controller Failed