Watts SD-3 User Manual

Model SD3

Backflow Preventors for Carbonated Beverage Machines
Installation Instructions

Sizes: 1⁄4" – 3⁄8" (8 – 10mm)

!

WARNING

Read this Manual BEFORE using this
equipment.
Failure to read and follow all safety
and use information can result in
death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.

Purpose

The Watts SD3 is a dual check with atmospheric
port designed for the protection of the water
supply from carbon dioxide gas and carbonated
water. These substances can flow from post-mix
beverage systems and are very acidic. If the
acidic water comes in contact with copper tub­ing or copper pipe, it will cause the leaching of
copper salts into the water supply. The dissolved
copper if ingested can

cause nausea, abdominal pain, and in some
cases vomiting. The SD3 prevents the reverse
flow of potentially contaminated water back into
the potable water supply. In the event the sec­ond check valve becomes fouled, the vent port
is opened to atmospheric and water and or CO2
gas from the downstream piping is discharged.

strainer included

Installation

Before installing, flush out pipe lines to remove
scale and other foreign matter. The valve can be
installed horizontally or vertically (flow up or down).
Install the valve in the line with the arrow on the
valve body pointing in the direction of flow.
Connect a vent discharge line to the vent outlet of
the SD3 and vent to a safe place of disposal with
adequate ventilation. The valve should be installed
such that the strainer and the valve are accessible
for service and maintenance.

NOTICE

The valve should not be installed where water dis­charge from the vent could cause damage to the
surrounding equipment or property. In addition, the
device should not be installed inside a wall or a
concealed location. Copper tubing shall not be
used on the downstream side of the backflow pre­venter used in carbonated systems. Copper tub­ing can be used downstream for non carbonated
systems such as coffee makers.

Applications

The Watts SD3 is recommended for use on
Carbonated Beverage Equipment and dispens­ing equipment for tea and coffee.

Maintenance

Annual inspection is required of the strainer and
the backflow preventer to insure proper opera­tion of the device.

Temperature and Pressure

Maximum Pressure - 150psi. (10.3 bar)
Maximum Temperature - 130°F. (54ºC)

Repair Kit

Kit consists of First and Second Check assem­blies complete.

IS-SD3

Installation

SD3

SD3 Total Repair Kit

Backflow

Water

Supply

Strainer

Valve

Preventer

Plastic

Pipe

Beverage

Dispenser

Strainer

SD3
Backflow
Preventer

ORDERING CODE KIT NO. SIZE

0888556 RKSD3T 1⁄4" - 3⁄8"

Water

Vent

Discharge

Line

Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original
shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES,
EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or
consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor
charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This
warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations
may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights.

SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

Supply

Valve

Filter

Pump 100psi

Vent Discharge Line

Carbonator H20

and CO

2

Carbonated

Beverage

Dispenser

Gas in a

CO

2

vented area

WARNING: This product contains chemicals known to
the State of California to cause cancer and birth defects
or other reproductive harm.

For more information: www.watts.com/prop65

A Watts Water Technologies Company

USA: Tel. [phone] • Fax: [phone] • www.watts.com

Canada: Tel. [phone] • Fax: [phone] • www.watts.ca

IS-SD3 1321 EDP# 1915234 © 2013 Watts