A. O. Smith 2-Stage Water Filter Replacement Manual

Model: AO-US-200-R

Filter Replacement Frequency

The recommended replacement frequency for the AO-US-200 is every 6 months or every 500 gallons of use.

La frecuencia de cambio recomendada para el AO-US-200 es cada 6 meses o cada 1,892 litros (500 galones) de uso.

Filter Certification and Performance

Use only certified, genuine A. O. Smith replacement filters for continued contaminant removal and system performance.

Solo use filtros de repuesto originales A. O. Smith y certificados para eliminación de contaminantes y rendimiento del sistema constantes.

Conforms to NSF/ANSI 53 for VOC reduction. See Performance Data Sheet for individual contaminants and reduction performance.

Conforma a NSF/ANSI 53 para la reducción de COV. Ve la Hoja de datos de rendimiento por contaminantes individuales y rendimiento de reducción.

Tested and Certified by WQA to NSF/ANSI Standards 42, 53, and 401 when used in AO-US-200 for the reduction of the claims specified on the Performance Data Sheet and at www.WQA.org.

Probado y certificado por el laboratorio WQA según las normas NSF/ANSI 42, 53, y 401 cuando se utiliza en AO-US-200 para la reducción de las declaraciones especificadas en la Hoja de datos de rendimiento y en www.WQA.org.

For the full list of contaminants filtered, scan to view the AO-US-200 Performance Data Sheet.

Para conocer la lista completa de los contaminantes filtrados, escanee para ver la hoja de datos de rendimiento de AO-US-200.

Installation Guide

STEP 1: Prepare for Installation

Turn off COLD water valve (1). Release pressure from system by turning on dedicated faucet until water stops flowing (2).
Unbox filter cartridge replacements and remove plastic.

STEP 2: Remove Filter Cartridges

Remove each sump from the unit housing by rotating the sump to the left and pulling down.
Holding the sumps over the sink, unscrew the top of the sump from the bottom by turning the bottom portion to the right. Pour excess water down the drain. Then, pull down on each filter cartridge to disconnect the filter cartridge from the top half of the sump.
Discard both filter cartridges.
Note: If sumps are too tight to disconnect by hand, please use the plastic wrench included with original system.

STEP 3: Insert Filter Cartridges

Press new filter with clear netting to the top of the Stage 1 sump. Reattach the bottom of the sump by ensuring connection points are correctly aligned, then turn to the right to tighten.
Continue this step for Stage 2 using the new filter with the blue netting.
Note: Do not use tools to tighten. Hand tighten only.

STEP 4: Reattach Sumps

Reattach sumps to system manifold with Stage 1 on the left and Stage 2 on the right. Ensure connection points are aligned, push top of sump into bottom of system housing, and twist to the right till you feel a 'click.' Ensure that each sump is fully attached and locked in.

Note: Ensure sumps are not on an angle while reattaching. This may result in damage to the o-ring.

Note: If your system was purchased before 2024, you may not hear the click while attaching the sumps.

STEP 5: Replace Battery

Remove battery tray and dispose of per instructions in NOTICES section. Remove plastic from new battery and tray. Insert new battery and tray into battery compartment. When inserted correctly, system will beep five times and blink red.

STEP 6: Flush and Check for Leaks

Slowly turn on COLD water supply. Turn off dedicated faucet and check for leaks. Then, turn on dedicated faucet and leave water running to flush cartridges for 10 minutes or until water is clear of carbon fines.

Note: Do not drink flushed water.

Notices

Compatible battery type: CR2450 Lithium Coin Battery
Compatible battery voltage: 3V
Ensure battery is installed correctly according to polarity (+ and -).
Do not mix old and new batteries, different brands or types of batteries, such as alkaline, carbon-zinc, or rechargeable batteries.
Non-rechargeable batteries are not to be recharged.
Do not force discharge, recharge, disassemble, heat above 90°F, or incinerate. Doing so may result in injury due to venting, leakage, or explosion resulting in chemical burns.
Remove and immediately recycle or dispose of batteries from equipment not used for an extended period of time according to local regulations.
Always completely secure the battery compartment. If the battery compartment does not close securely, stop using the product, remove the batteries, and keep them away from children.
Remove and immediately recycle or dispose of used batteries according to local regulations and keep them away from children. Do NOT dispose of batteries in household trash or incinerate them.
Even used batteries may cause injury or death.
Call a local poison control center for treatment information.

Scan to view AO-US-200 replacement video. ▶️

▲ WARNING

INGESTION HAZARD: This product contains a button cell or coin battery.
DEATH or serious injury can occur if ingested.
A swallowed button cell or coin battery can cause Internal Chemical Burns in as little as 2 hours.
KEEP new and used batteries OUT OF REACH of CHILDREN.
Seek immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body.

This filter system is designed and tested for use with genuine A. O. Smith parts, including replacement filters, faucet and all hardware. Use of parts from other manufacturers may result in loss of contaminant reduction performance, system damage or failure. Use of parts from other manufacturers will also void your warranty. Please visit AOSmithAtLowes.com for replacement parts. Installation must comply with state and local ordinances.

A. O. Smith is not liable for consequential or incidental damages due to improper installation.

Este sistema de filtrado está diseñado y probado para ser usado con piezas originales de A. O. Smith, lo que incluye los filtros, la llave y todas las piezas metálicas de repuesto. El uso de piezas de otros fabricantes puede generar una pérdida en el rendimiento de la reducción de contaminantes, dañar el sistema o causar fallas. El uso de piezas de otros fabricantes también anulará su garantía. Visite AOSmithAtLowes.com para pedir repuestos. La instalación debe cumplir con las ordenanzas estatales y locales.

A. O. Smith no se hace responsable por daños indirectos o emergentes a causa de una instalación incorrecta.

A. O. Smith Corporation 11270 W Park Pl #170, Milwaukee, WI 53224 | 877.333.7108

NEED HELP? GIVE US A CALL 877.333.7108

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