Autotrol (1031391) Timer Locking Pin 500 Gal. Polyphosphate/GAC Carbon Scale/Corrosion Inhibitor & Chlorine Removal Filter The ISO-WH1-20B is purpose-built for

The ISO-WH1-20B is purpose-built for larger homes and applications where standard compact whole house filters create bottlenecks

NSF 60 Certified Media

The polyphosphate media helps protect downstream components from lime scale buildup in areas with moderate to hard water

Manufactured entirely from FDA-approved materials suitable for drinking water

Autotrol (1031391) Timer Locking Pin 500 Gal. Polyphosphate/GAC Carbon Scale/Corrosion Inhibitor & Chlorine Removal Filter The ISO-WH1-20B is purpose-built forAutotrol Control Valve Component Autotrol 1031391 Timer Locking Pin Precision replacement part for secure timer assembly in Autotrol control valves OEM Autotrol Part Direct Fit Replacement Essential Timer Component The Autotrol 1031391 Timer Locking Pin is a critical component for securing the timer assembly in Autotrol control valves. This OEM replacement part ensures proper timer function and prevents drift or misalignment during regeneration