A.O. Smith AO-US-RO-4000 User Manual

OWNER'S MANUAL
Use this owner’s manual to reference
installation, troubleshooting and
lter replacement information.
If you need help or have a
question, we’ve got you covered.
Give us a call at
877.333.7108

A.O. Smith AO-US-RO-4000 Specifications

General

Model	AO-US-RO-4000
Category	Water Dispenser
Filtration Technology	Reverse Osmosis
Type	Reverse Osmosis Water Purifier
Warranty	1-year limited warranty

Summary

Installation Guide

Prepare Site and Plan for Installation

Guides users on preparing the installation site and planning the placement of the system components.

Install Brass Tee Fitting

Step-by-step instructions for connecting the brass tee fitting to the water supply.

Install System Manifold

Details how to mount and secure the system manifold under the sink.

Install RO Faucet

Instructions for installing the dedicated RO faucet through the countertop.

Install Water Storage Tank

Covers the process of connecting and positioning the water storage tank.

Install Drain Connector

Step-by-step guide for attaching the drain connector to the sink's drain pipe.

Connect Tubing

Filter Installation

Sanitize, Test, and Purge System

Guides on sanitizing the system, performing pressure tests, and purging for initial operation.

Troubleshooting Guide

Leaking from Sumps

Leaking from Key Hole

Constant Noise / Loud Noise

Slow Flow Issues

Care and Maintenance

Filter Replacement Schedule

Details recommended replacement intervals for Carbon, Claryum, RO Membrane, and Remineralizer filters.