Specifications

6
Tech Support: 855-ONE-ZURN
www.zurn.com
3/8" – 1"
1
1
/
4
" – 2"
• 3/8”, 1/2”, 3/4”, 1”, 1
1
/
4
”, 1
1
/
2
”, 2”
• Pressure rated 400 psi
• Spring range 15 to 150 psi (sizes 3/8” – 1”); spring range 15 to 75 psi
(sizes 1
1
/
4
” – 2”); factory set at 50 psi
• Maximum temperature 180°F
• Sizes 1/2” – 1”, all bronze body and composite bell housing
• Sizes 1
1
/
4
” – 2”, all bronze body and bell housing
• Replaceable acetal cartridge with integral stainless steel strainer
• Built-in by-pass prevents buildup of excessive system pressure caused by
thermal expansion
• Removable spacer limits adjustment range to 80 psi (sizes 3/8” – 1”)
• Nylon reinforced Buna-N diaphragm
• Balanced piston design
• May be installed in any position
• All internal parts corrosion-resistant and included in a drop-in cartridge
• Short lay length makes for easy retrofit
• No special tools required
• Serviceable in-line
• Available tapped and plugged for gauge (optional)
• Available tapped with gauge (optional)
• Available with BSP threads (optional)
• ASSE
®
Listed 1003, IAPMO
®
Listed, CSA
®
Certified, City of Los Angeles.
Model BR4 Single union with FNPT tailpiece, inlet and outlet
both male threaded for union on either or both
sides
Model BR4C Union end connection standard in female copper
sweat
Model BR4DU Double union with two FNPT tailpieces and union
nuts
Model BR4DUC Double union with two female copper sweat
tailpieces and two union nuts
Model BR4DULU Less tailpieces and union nuts, female iron pipe
thread
Model BR4DM Double meter end connections (3/4”, 1”)
Model BR4EC (1/2” – 1”) Supplied with thermal expansion
control valve. See REG-BR4EC for additional
information
Model BR4SC Sealed cage bell and stainless steel adjusting
screw. For below-ground and indoor applications
Model BR4PEX Union end supplied with male barb connection
tailpiece for cross-linked polyethylene (PEX) tubing
Model BR4DUPEX Supplied with two male barb connection tailpieces
for cross-linked polyethylene (PEX) tubing
Model BR5 Stainless steel main valve body (3/4”, 1”)
OptionsTypical InstallationX Ref Features Applications
The BR4 was Wilkins first pressure reducing valve to utilize a replaceable thermoplastic cartridge. The plastic
cartridge reduces internal corrosion, thus increasing the time between cartridge replacements. Its 15 to
150 psi adjustment range is the broadest of any regulator that Wilkins offers. Accepting up to 400 psi on
the inlet and having end connections that are threaded for both unions and female NPT make the BR4
extremely versatile in residential, commercial and irrigation applications. As with all Wilkins regulators, the
integral by-pass helps prevent pressure buildup in a closed system due to thermal expansion.
 Special plastic spacer nipple for use with 1/2”, 3/4”, 1
1
/
4
”, 1
1
/
2
” and 2”
BR4 double union regulators (Model BR4DUSPC)
 Special spacer nipple for use with 1” BR4 double union regulators
(Model 70DUSPC)
Local codes shall govern installation requirements. Unless oth-
erwise specified, the assembly shall be mounted in accordance
with the latest edition of the Uniform Plumbing Code. The Model
BR4 may be installed in any position. If installed in a pit, vault, or
indoors, specify the “SC” sealed cage option. The assembly shall
be installed with sufficient side clearance for testing and mainte-
nance. Multiple installations are recommended for wide demand
variations or where the desired pressure reduction is more than 4
to 1 (ie: 200 psi inlet reduced to 50 psi outlet). CAUTION: Anytime
a reducing valve is adjusted, a pressure gauge (Model HGI-25)
must be used downstream to verify correct pressure setting. Do
not bottom out adjustment bolt on bell housing.
 Pressure gauges (Model 92-25)
For other tailpiece options, see page 15.
For Additional Information, including flow curves, reference
WK-RC catalog or visit our web site.
BR4 Series
Accessories
WILKINS WATTS CONBRACO CASH-ACME HONEYWELL-BRAUKMANN
BR4 N35BU, N45BU, N55BU 36C-U EB-86U, EB-87U D05A, DO6G
BR4DU N35BDU, N45BDU, N55BDU 36C-U2T D05D, DO6G
BR4DUC N35BDU-S,N45BDU-S, N55BDU-S 36C-U2S
BR4DULU N35B, N45B, N55B 36C EB-86
BR4C N35BU-S, N45BU-S, N55BU-S 36C-US EB-86C
MODEL 375
BACKFLOW PREVENTER
MODEL S
STRAINER
MODEL 850
SHUT OFF
MODEL BR4
REGULATOR
Water Pressure Reducing Valves