User Guide

Installation Instructions
Indoors – Figure 1
For indoor installations, it is important that the assembly be
easily accessible to facilitate testing and servicing. If it is located
in a line close to a wall, be sure the test cocks are easily acces-
sible. A drain line and air gap (see literature ES-AG/EL/TC)
should be piped from the relief valve connection as shown,
where evidence of discharge will be clearly visible and so that
water damage will not occur. Therefore, never install in con-
cealed locations.
Outside – Figure 2
In an area where freezing conditions do not occur, Series 009 can
be installed outside. The most satisfactory installation is above
ground and should be installed in this manner whenever possible.
In an area where freezing conditions can occur, Series 009
should be installed above ground in an insulated enclosure.
Series 009 must be installed in an accessible location to facili-
tate testing and servicing. A discharge line should be piped
from the air gap at the relief valve connection making sure that
there is adequate drainage. Never pipe the discharge line
directly into a drainage ditch, sewer or sump. Series 009
should never be installed where any part of the unit could
become submerged in standing water.
It is generally recommended that backflow preventers never be
placed in pits unless absolutely necessary and then only when
approved by local codes. In such cases, a modified pit installa-
tion is preferred.
Parallel – Figure 3
Two or more smaller size assemblies can be piped in parallel (when
approved) to serve a large supply pipe main. This type of installa-
tion is employed where increased capacity is needed beyond that
provided by a single valve and permits testing or servicing of an
individual valve without shutting down the complete line.
The number of assemblies used in parallel should be deter-
mined by the engineer's judgement based on the operating
conditions of a specific installation.
For parallel valve installations, the total capacity of the assem-
blies should equal or exceed that required by the system.
Annual inspection of all water system safety and control
valves is required and necessary. Regular inspection,
testing and cleaning assures maximum life and proper
product function.
2
1
⁄2" – 3"
(65-80mm) 009
2
1
⁄2" – 3"
(65-80mm) 009
*
2
1
⁄4" – 2"
(80-50mm)
009
Figure 1
Figure 2
Figure 3
Air Gap
Main
Strainer
Meter
2
1
⁄2" – 3" (65-80mm) 009
12"
Fiberglass WattsBox
12"
Now available, WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.
Now available, WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.
WattsBox