Ames 2
1
/
2
" – 10" (65 – 250mm) 4000CIV
High Capacity Relief Series: Location
and Installation Considerations
1. Backflow preventers must be installed in high-visibility
locations in order to allow for immediate notice of telltale
discharge or other malfunction. This location should also
facilitate testing and servicing, and protect against freezing
and vandalism.
2. Installing a backflow preventer in a pit or vault is not recom-
mended. However, if this becomes necessary, Ames highly
recommends that a licensed journeyman tradesperson, who
is recognized by the authority having jurisdiction, be con-
sulted to ensure that all local codes and required safety pro-
visions are met. An air gap below the relief port must be
maintained so as to avoid flooding and submersion of the
assembly, which may lead to a cross-connection. *Please
refer to Figure No. 1 for further information.
3. A strainer should be installed ahead of the backflow pre-
venter to protect all internal components from unneces-
sary fouling.
Caution:
Do not install a strainer ahead of the backflow
preventer on seldom-used, emergency water lines (i.e. fire
sprinkler lines). The strainer mesh could potentially become
clogged with debris present in the water and cause water
blockage during an emergency.
4. Normal discharge and nuisance spitting are accommodated
by the use of an air gap fitting and a fabricated indirect
waste line. Floor drains of the same size MUST be provided
in case of excessive discharge. *Please refer to Figure No. 1
and Figure No. 2 for further information.
5. When a Series 4000CIV backflow preventer is installed for
dead-end service applications. (i.e. boiler feed lines, cooling
tower makeup or other equipment with periodic flow
requirements), discharge from the relief vent may occur due
to water supply pressure fluctuation during static no-flow
conditions. A check valve may be required ahead of the
backflow preventer. *Please see “Troubleshooting”, Page 7,
prior to installation.
6. The relief valve module on 2
1
/
2
" – 10" (65 – 250mm) Series
4000CIV assemblies may be turned to discharge to the
opposite side. To do so, unbolt the relief valve and turn the
relief valve discharge port to the opposite side. Mount the
high pressure hose on the opposite. This should be done
by a licensed journeyman tradesperson, who is recognized
by the authority having jurisdiction and only when space is
critical for testing or repair.
7.
ASSEMBLY:
If the backflow preventer is disassembled dur-
ing installation, it
MUST
be reassembled in its
proper order.
The gate valve with the test cock is to be mounted on the
inlet side of the backflow preventer. The test cock must be
on the inlet side of the wedge. Please see Figure No. 1.
Failure to reassemble correctly will result in possible water
damage due to excessive discharge from the relief port/vent
and possible malfunction of the backflow preventer.
8.
Installation procedures must comply with all state and
local codes and must be completed by a licensed jour-
neyman tradesperson who is recognized by the authori-
ty having jurisdiction.
Please see Page 3 for specific
installation procedures.
9. Prior to installation, thoroughly flush all pipe lines to remove
any foreign matter.
10.
START UP at Initial Installation and After Servicing:
The
downstream shutoff should be closed. Slowly open
upstream shutoff and allow the backflow preventer to fill
slowly. Bleed air at each test cock. When backflow preven-
ter is filled, slowly open the downstream shutoff and fill the
water supply system. This is necessary to avoid dislodging
"O" rings or causing damage to internal components.
11.
TEST:
The Series 4000CIV backflow preventer may be test-
ed by a certified tester at the time of installation in order to
ascertain that the assembly is in full working order and may
be relied upon to protect the safe drinking water as per
applicable standard.
*Consult local authorities regarding acceptance of vertical installations.
2
Basic Installation Instructions
Figure No. 1
#1
Shutoff Valve
First
Check
Second
Check
#2
Shutoff Valve
Relief
Valve
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.
Figure 1
Model 4000CIV Relief Valve Disharge Rates
2
1
/
2
" – 3" 4000
(65-80mm)
4" – 10" 4000
(100-250mm)
0
100
200 300 400
500 600 700 800 900
Flow Rate (GPM)
Zone Pressure (PSIG)
175
150
125
100
75
50
25
0
Figure 2
Typical Flow Rates
Valve
as sized by floor
Drain
size
drain manufacturers
size
in.
mm
2
1
/
2
65
55 gpm
2
3
80
112 gpm
3
4
100
170 gpm
4
6, 8, 10
150-250
350 gpm
5
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