Specifications

41
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OptionsTypical Installation
Model 375MS/375AMS Flanged NRS x flanged NRS with
RV monitor switch
Model 375MSFSC/375AMSFSC With epoxy coated wye type
strainer (flanged only)
Model 375MSG/375AMSG With groove end gate valves
Model 375AMSBGVIC Supplied with groove x groove
body and grooved, tampered
Victaulic
®
butterfly valves
Model 375MSFG/375AMSFG With flanged inlet gate connection
and grooved outlet gate connection.
Model 375MSL/375AMSL Less shut-off valves
Model 375MSOSY/375AMSOSY With OS&Y gate valves
For Additional Information, reference WK-BPC catalog or visit
our web site.
To create a part number to fit your needs, see page 3 for an
example
Reduced Pressure Principle 375MS/375AMS
Pat. No. 5,425,393 and 5,913,331
Features Applications
• 2
1
/
2
”, 3”, 4”, 6”, 8”, 10”
• Reduced pressure principle backflow prevention valve assembly with
integral relief valve monitor switch
• Same features as the 375A
• Completely sealed UL
®
recognized proximity switch factory installed –
Normally open contacts, weather resistant housing and wiring leads
ready for immediate installation to appropriate electrical circuit
• In the event of a backflow condition, the relief valve closes an electrical
circuit, signaling that a possible relief valve discharge may be occurring
• Approved by the Foundation for Cross Connection Control and
Hydraulic Research at the University of Southern California, ASSE
®
, CSA
®
(375AMSBGVIC 2
1
/
2
” – 8”)
• UL
®
listed, C-UL
®
listed, FM
®
Approved
Building on the superior characteristics of the 375A / 375 reduced pressure principle series is the
375AMS and 375MS. Provided with a monitor switch in the relief valve, the MS series, when con-
nected to the proper electrical circuit, will provide confirmation that the relief valve is in a discharg-
ing condition. This is a highly useful configuration where the assembly may be installed in a remote
location, and the discharge could cause catastrophic water damage. The 375AMS and 375MS are
designed for high hazard application where preventing backpressure or backsiphonage is required.
 Air gap (Model AG)
 Thermal expansion tank (Model XT)
 OS&Y gate valve supervisory switch (OSY-40)
 Electronic solenoid timer (Model EST)
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12” (305mm) and a maxi-
mum of 30” (762mm) above adequate drains with sufficient side clearance for testing and maintenance. The installation shall be made so that no part of
the unit can be submerged.
 Quick test set (QT-SET)
 Test cock lock (Model TCL24)
 Solenoid control valve (ZW106)
Accessories
Model 375AMSBGVIC
imer
E
S
lectric
olenoid
T
12" MIN.
MODEL 375MSOSY
MODEL EST
MODEL ZW106
30" MAX.
375MS with ZW106 Solenoid Control Valve and EST
Electronic Solenoid Timer
DIRECTION OF FLOW
Backflow Preventers