User Manual

WattsBox
Insulated Enclosures
Specifications
Backflow prevention assemblies subjected to potential freezing con-
ditions shall be protected with the WattsBox enclosure as shown.
The enclosure shall be of reinforced aluminum construction, provid-
ing access through doors for testing/certification purposes. It must
also be totally removable for maintenance purposes. The enclosure
shall be structurally lined with a unicellular, non-wicking insula-
tion consisting of a sandwich laminate or applied by spray. It shall
contain a thermostatically controlled heat source mounted to the
interior wall or on the backflow preventer to provide protection to
-30°F. No wood or “particle board” shall be allowed in assembly.
Insulation mounted with glue will be cause for rejection. Power
source will be protected with a ground fault circuit interrupting
receptacle, UL Standard 943, NEMA 3R, installed by others, inside
the box.
The enclosure shall contain drain openings sized to accommodate
the maximum discharge of the reduced pressure zone assembly.
Drain openings shall open to discharge under the most severe
conditions. These openings are protected against intrusion of either
wind, debris or animal. The enclosure is provided with means of
permanent anchor and “lockable” access doors and/or lid to pro-
hibit theft or vandalism.
All “wet” portions of the backflow prevention assembly shall be
protected within the enclosure. Fire department hose connections
and OSY indicating valve handles shall be maintained outside the
enclosure.
The enclosure shall be factory assembled and delivered to the site
ready to install with no drilling, screwing or riveting of enclosure
required on site. The enclosure and the backflow preventer shall
be covered by a single warranty policy. Enclosure shall be a Watts
Series WattsBox.
For Outdoor Installations
ES-WB
Features
•DesignedtoeliminatevalvevaultentryrequirementsofOSHA
confined Space Ruling 29CFR 1910.146.
•SinglesourceWattsRegulatorwarrantyoftheenclosure,the
backflow preventer, and the heat source.
•Allowsfortheinstallationofthebackflowpreventer“atthe
service connection” in accordance with AWWA Standards.
•IsspecificallydesignedtomeetNFPAguidelines.
The enclosure provides freeze protection to maintain the water
supply to the property’s fire protection system. (NFPA 3-3.1.8
and 3.6.1.3.2).
•Strategicallyplaceddoorsprovideaccesstothebackflowpre-
vention assembly for testing and repair without removal of the
entire unit.
•Aneconomicalalternativetoexpensiveretrofitinstallations.
•Eliminatespotentialdrainageconstraintsinexistingequipment
rooms.
•Savesvaluablefloorspace.
•Standardlyfurnishedwiththermostaticallycontrolledheatsource
for freeze protection down to -30°F.
•Containsnostructuralwoodorparticleboardforlonglife.
•Easyinstallationaluminumenclosuresfeatureinterlockingpanels
which eliminate the use of screws during assembly.
•Canbetemporarilyremovedforreplacementofthebackflow
preventer without the need for replacement of freeze protection
services.
•ASSE1060Certified(Consultfactoryforapprovedmodels)
WattsBox Aluminum Enclosure
Job Name
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Contractor
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Job Location
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Approval
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Engineer
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Contractor’s P.O. No.
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Approval
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Representative
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Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
NOTICE
The information contained herein is not intended to replace the full
product installation and safety information available or the experi-
ence of a trained product installer. You are required to thoroughly
read all installation instructions and product safety information
before beginning the installation of this product.