Installation Sheet

Series SD2
Backflow Preventers for Carbonated Beverage Machines
Sizes:
1
⁄4" -
3
⁄8" (8 - 10mm)
IS-SD2
Applications
The Watts SD2 is recommended for use on Post-Mix Carbonated Beverage
Equipment and dispensing equipment for tea and coffee.
Maintenance
Annual inspection is required of the backflow preventer to insure proper
operation of the device. It is also recommended that a strainer be installed
upstream of the backflow preventer.
Temperature and Pressure
Maximum Pressure - 200psi (13.8 bar). Maximum Temperature - 110°F
(43°C).
Repair Kit
Kit consists of First and Second Check assemblies complete.
Installation Instructions
The Watts SD2 is a dual check 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 SD2 prevents the reverse flow of potentially contaminated water back
into the potable water supply due to back pressure backflow and is used
for continuous or intermittent pressure conditions.
Installation
Before installing, flush out pipe lines to remove scale and other foreign mat-
ter. 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. The valve should be installed such that the valve is acces-
sible for service and maintenance.
The device should not be installed inside a wall or in 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 down-
stream for non carbonated systems such as coffee makers.
NOTICE
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.