Product Overview

Materials
Springs Stainless Steel
Bonnet Celcon
Vent Disc Silicone Rubber
Disc Holder Float Polypropylene
Check Valve Disc Silicone Rubber
Check Valve Seat Noryl Plastic
Body Bronze
Pressure - Temperature
Temperature Range: 33°F to 140° (1°C to 60°C)
Maximum Working Pressure: 150psi (10.3 bar)
Installations
This valve is designed for installation in a continuous pressure
potable water supply system 12" above the highest point of the
downstream piping. The valve must be installed with the supply
connected to the bottom and in a vertical position. Allow adequate
space for periodic inspection, servicing or testing. The valve
should not be installed in an area where freezing or spillage will
cause damage. Adequate drainage/freeze protection must be pro-
vided in cold weather applications. 1.5psi (.10 bar) must be exert-
ed against the float spring to seal the float and air inlet. Do not
undersize supply and discharge piping.
Important Note: Vacuum breakers are not designed, tested or
approved to protect against backpressure backflow or water ham-
mer shock. For protection against backpressure backflow, install
Watts 909/009 Reduced Pressure Zone Backflow Preventer. For
Protection against water hammer shock install a Watts Series 15
Water Hammer Arrestor utilizing good plumbing practice.
Dimensions – Weights
Standards
ANSI, IAPMO, USC Manual Section 10
Approvals
IAPMO
Approved by the foundation for Cross-Connection Control and
Hydraulic Research at the University of Southern California,
Manual Section 10.
D
C
E
A
G
B
1020 B64.12
C
D
A
G
B
U800M4FR
800M4FR
MODEL SIZE (DN) DIMENSIONS WEIGHT
AB C D E G
in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kg.
800M4FR
1
⁄2 15 6
1
⁄8 156 6
1
⁄4 159 2
9
⁄16 65 3
11
⁄16 94 3
7
⁄8 98 2
1
⁄4 57 4 1.8
800M4FR
3
⁄4 20 6
1
⁄2 165 6
1
⁄2 165 2
9
⁄16 65 3
15
⁄16 100 4
1
⁄8 105 2
1
⁄4 57 4 1.8
800M4FR 1 25 7
1
⁄2 191 7
1
⁄2 191 2
3
⁄4 70 4
3
⁄4 121 4
7
⁄8 124 3
7
⁄16 87 6 2.7
800M4FR 1
1
⁄4 32 8
7
⁄8 225 9 229 3
1
⁄4 83 5
3
⁄4 146 6
1
⁄8 156 5 127 11 5.0
800M4FR 1
1
⁄2 40 9
1
⁄4 235 9
1
⁄2 241 3
1
⁄4 83 6
1
⁄4 159 6
3
⁄8 162 5 127 14 6.3
800M4FR 2 50 10
5
⁄8 270 9
5
⁄8 245 3
1
⁄4 83 6
3
⁄8 162 7 178 5 127 19 8.6
U800M4FR
3
⁄4 20 6
3
⁄8 163 7
9
⁄16 192 2
1
⁄8 55 5
7
⁄16 138 – – 2
1
⁄4 57 4 1.8
U800M4FR 1 25 8
5
⁄16 211 9 229 2
13
⁄16 71 6
3
⁄16 158 – – 3
7
⁄16 87 6 2.7
800M4FRQC
1
⁄2 15 7
7
⁄8 199 8 203 2
13
⁄16 71 5
7
⁄16 138 5
5
⁄8 144 3
7
⁄16 87 4.5 2.0
800M4FRQC
3
⁄4 20 8
1
⁄2 216 8
1
⁄2 216 2
13
⁄16 71 5
11
⁄16 144 6
1
⁄8 156 3
7
⁄16 87 4.7 2.1
800M4FRQC 1 25 9
1
⁄2 241 9
1
⁄2 241 2
13
⁄16 71 6
3
⁄4 171 6
7
⁄8 175 3
7
⁄16 87 6.6 3.0