Ames Fire & Waterworks 4000B-FP Bronze Reduced Pressure Zone Assemblies with Gear Operated Slow Close Isolation Valves - Manual (Page 2)

Please Read Prior to Installation:
1. Before installing any Ames assembly, Flush the Line thor-
oughly to remove all debris, chips and other foreign objects.
2. Ames Series 4000B/LF4000B should be installed in a hori-
zontal and upright position. This positions the relief valve be-
low the first check valve, enabling the zone to drain through
the relief valve outlet. The shutoff valve with the test cock is
to be mounted on the inlet side of the backflow preventer.
The test cock is on the inlet side of the shutoff valve.
3. The 4000B/LF4000B should always be installed in an acces-
sible location to facilitate testing and servicing. Check the
state and local codes to ensure that the backflow preventer
is installed in compliance, such as the proper height above
the ground.
4. Water discharge from the relief valve should be vented in
accordance with code requirements. The relief valve should
never be solidly piped into a drainage ditch, sewer or sump.
The discharge should be funneled through an Ames air gap
fitting piped to a floor drain.
5. Ames recommends that a strainer be installed ahead of
Series 4000B/LF4000B assemblies to protect the discs from
unnecessary fouling.
CAUTION !
Do not install with strainer when backflow preventer is used on
seldom used water lines which are called upon only during emer-
gencies, such as fire sprinkler liners.
6. Backflow preventers should never be placed in pits unless
absolutely necessary and then only when and as approved
by local codes. Consult your local or state plumbing or
health inspector. Ames recommends installation indoors or
above ground in an insulated enclosure.
Start up
7. The downstream shutoff valve should be closed. Open
upstream shutoff valve slowly, fill the valve and bleed the
air through test cock 2, 3 and 4. When valve is filled, open
the downstream shutoff slowly and fill the water supply
system. This is necessary to avoid water hammer or shock
damage.
8. The installation of an Ames air gap with the drain line termi-
nating above a floor drain will handle any normal discharge
or nuisance spitting through the relief valve. However, floor
drain size may need to be designed to prevent water dam-
age caused by catastrophic failure condition. Do not reduce
the size of the drain line from the air gap fitting.
2
Basic Installation Instructions
Above Ground
Indoors
Strainer
Air Gap
Min. 12"
Main
Meter
Strainer
First Shutoff
Valve
Air Gap
45˚ Angle
Clearance to
Wall 6" – 12"
Test Cocks
Min. 12"
Max. 60"
1 2 3 4