Min. 12"
2
Indoor Installation
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 wall, be sure the test cocks are easily accessible. A drain
line and air gap 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, Above Ground Installation
NOTICE
Must take precaution to protect against freezing. Temperatures
below 32°F can lead to damage or property loss.
In areas where freezing conditions do not occur, Series 995 can
be installed outside. The most satisfactory installation is above
ground.
In areas where freezing conditions can occur, Series 995 should
be installed above ground in an insulated enclosure.
Series 995 must be installed in an accessible location to facilitate
testing and servicing. A discharge line should be piped from the
air gap at the relief valve connection making sure that there is ade-
quate drainage. Never pipe the discharge line directly into a drain-
age ditch, sewer or sump. Series 995 should never be installed
where any part of the unit could become submerged in standing
water.
Backflow preventers should never be placed in pits unless
approved by local codes. In such cases, a modified pit installation
is preferred.
Parallel Installation
Two or more smaller size assemblies can be piped in paral-
lel (when approved) to serve a large supply pipe main. This type
of installation 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 line com-
pletely.
The number of assemblies used in parallel should be determined
by the engineer's judgement based on the operating conditions of
a specific installation.
For parallel valve installations, the total capacity of the assemblies
should equal or exceed that required by the system.
Basic Installation Instructions
1
⁄
2
" - 2" (15 - 50mm)
Meter
Strainer
Indoor Installation
1" Watts 995QT
with Air Gap
W
W
12"
Outdoor Installation
Indoor Installation
Watts 995QT
Now available. WattsBox Insulated Enclosures,
for more information, send for ES-WB or ES-WB-T.
995QTS
WattsBox
Summary of Contents for 995 Series
Page 7: ...7 Notes...
