Watts 007M1DCDA User Manual
Series 007DCDA
Double Check
Detector Assembly
Sizes: 2" - 3"
• Installation • Service
• Repair Kits • Maintenance
For field testing procedure, send for IS-TK-DL,
IS-TK-9A, IS-TK-99E AND IS-TK-99D.
For other repair kits and service parts, send for
PL-RP-BPD.
RP/IS-007DCDA
Limited Warranty: Watts Regulator 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. This 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 or
improper installation of the product. THIS WARRANTY IS IN LIEU OF ALL OTHER WAR-
RANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE.Any implied warranties that
are imposed by law are limited in duration to one year.
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.
NOTE: For Australia and New Zealand: Pipeline strainers
should be installed between the upstream shutoff valve and the
inlet of the backflow preventer.
Its important that this assembly be tested periodically in compliance with local codes, but at least once per year or more as
service conditions warrant. If installed on a fire sprinkler system, all mechanical checks, such as alarm checks and backflow preventers, should be flow tested and inspected internally
in accordance with NFPA 13 and NFPA 25.
007DCDA Size: 21⁄2"
IMPORT ANT: Inquire with governing authorities
for local installation requirements.
Installation Instructions
2" - 3" 007DCDA
Indoors –
Figure 1
Watts Series 007DCDA may be installed in either a vertical or
horizontal position. Pipe lines should be thoroughly flushed to
remove foreign material before installing the unit. A strainer
should be installed as shown, ahead of backflow preventer to
prevent disc from unnecessary fouling. Install valve in the line
with arrow on valve body pointing in the direction of flow.
For indoor installations, it is important that the valve be easily
accessible to facilitate testing and servicing. Do not install in a
concealed location.
CAUTION: Do not install with strainer when backflow preventer
is used on seldom-used water lines which are called upon during emergencies, such as fire sprinkler lines, etc.
It is important that Series 007DCDA be tested periodically in
compliance with local codes, but at least once a year or more
often depending upon system conditions.
Note Fire Protection System Installations:
The National Fire Protection Agency (NFPA) Guidelines require a
confirming flow test to be conducted whenever a “main line”
valve such as the shutoff valves or a backflow assembly have
been operated. Certified testers of backflow assemblies must
conduct this test. The trim valves of the detector meter bypass
line, on assemblies so equipped, should be shut off during the
confirming flow test. When the test is completed the trim valves
must be retuned to a fully open position.
Outside – Figure 2
In an area where freezing conditions do not occur, Series
007DCDA can be installed outside of a building. 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
007DCDA should be installed above ground in an
insulated enclosure.
Parallel – Figure 3
Two or more Series 007DCDA smaller size valves may be piped
in parallel (where approved) to serve a larger supply pipe main.
This type of installation is employed whenever it is vital to maintain a continuous supply of water/where interruptions for testing
and servicing would be unacceptable. It also has the advantage
of providing increased capacity where needed beyond that provided by a single valve and permits testing or servicing of an
individual valve without shutting down the complete line. For
two valve installations the total capacity should equal or exceed
that required by the system.
The quantity of valves used in parallel should be determined by
the engineer’s judgement based on the operating conditions of
a specific installation. (See literature F-FC regarding flow curves)
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.
Installation Note:
The flange gasket bolts for the gate valves should be
retightened during installation as the bolts may have
loosened due to storage and shipping.
2
Figure 1
Figure 2
Figure 3
Main
Strainer
Meter
Now available,WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.
WattsBox
12" minimum
refer to local codes
Vertical Flow Up
Watts
2", 2
1
⁄2", 3" 007DCDA
Minimum 12"
Watts
2", 21⁄2", 3" 007DCDA
Strainer
Series 77F-D-FDA
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