Watts PWRO4 User Manual

For Residential and Light Commercial Applications

ES-WQ-PWRO4

Job Name

Job Location

Engineer

Approval

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LEAD FREE

*

Contractor

Approval

Contractor’s P.O. No.

Representative

Model PWRO4

4-Stage Reverse Osmosis (RO) System

This 4-Stage Reverse Osmosis System is a tried and true
reverse osmosis system! The Watts Pure Water 4-Stage RO
System begins with Stage 1, a 5-micron Sediment filter that
traps particulate matter like dirt, rust, sand, silt and sediment
that will affect the taste and appearance of your water. Stage
2 is a 5-micron Carbon Block filter that provides a reduction of
chlorine, chloramine and other materials that cause bad taste
and odors (these are called PRE-filters because they filter in
front of the reverse osmosis membrane). Stage 3 is the heart
of the reverse osmosis system, the RO Membrane. This semi­permeable membrane is 1/10,000 of a micron and will effec­tively reduce TDS (total dissolved solids), sodium and a wide
range of contaminants such as Arsenic, Lead, Perchlorate,
Chromium, Copper and Radium. It will also remove over

99.95% cysts such as Giardia and Cryptosporidium. Stage 4 is
a high-quality GAC final filter (this is called a final filter because
it filters after the membrane). The filtered RO water passes
through the membrane and enters the storage tank. When
you're ready for use, it will leave the storage tank and pass
through this fourth stage on its way up to the faucet. The end
result — Crystal clear, high quality, and great tasting water!

Applications

Home, Office, Ice Maker Kits, Beverage Dispensers, and more.

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PURE WATER

PWRO4

Replacement Filter Packs

MODEL FREQUENCY DESCRIPTION

PWFPKSEDCB 6 Months

PWFPK4RO4

PWMEM50 2 - 5 years 50 gpd membrane
PWILGAC10 Annual 10" final in-line filter
Note: Water conditions may require more frequent cartridge replacement

Includes sediment and carbon
filter only
Includes all filters and
membrane

Features

• Multi-Stage water filtration

• Easy to Install

Specifications

System tested and certified by NSF International against NSF/
ANSI Standard 58 for the reduction of the claims specified on
the performance data sheet.

EPA/ ETV Test verified performance for the physical removal of
microbial contamination agents in drinking water

System tested and certified by NSF International
against NSF/ANSI Standard 58. Refer to PDS for
specific performance claims.

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with­out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Note: Do not use with water that is microbiologically unsafe or

of unknown quality without adequate disinfection before or after
the system. Systems certified for cyst reduction may be used
on disinfected waters that may contain filterable cysts.

*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.

System tested and certified by
WQA against NSF/ANSI Standard
372 for “lead free” compliance

System Specifications

Operating Temperatures: Maximum 100°F (37.8°C),

Operating Pressure: Maximum 85psi (6.0 kg/cm2)

pH Parameters: Maximum 11, Minimum 2

Iron: Maximum 0.2 ppm

TDS (Total Dissolved Solids): < 1800 ppm

Turbidity: < 5NTU

Unit Dimensions: Approx. 16" W x 16" H x 6" D

Weight: 25 lbs.

Minimum 40°F (4.4°C)

Minimum 40psi (2.80 kg/cm2)

In the Box:

4-Stage Reverse Osmosis module (complete with filters)

Parts Bag (with a 6" final filter)

3-Gallon Storage tank

Faucet bag

Instructions (manual)

Filters

1 - 5-Micron Sediment: Reduces Dirt, Sand and Rust.

1 - 5-Micron Carbon Block: Reduces Chlorine, Objectionable
Tastes and Odor.

1 - 50 GPD Thin Film Composite Membrane: High production
thin film composite membrane that separates unwanted impuri­ties from your water.

1 - 6" Granular Activated Carbon (GAC) Inline Filter: Enhances
the water’s taste.

A Watts Water Technologies Company

ES-WQ-PWRO4 1248 © 2012 Watts

USA: Tel. [phone] • www.watts.com

Canada: Tel. [phone] • www.watts.ca