2
NOTICE
The flange gasket bolts for the gate valves should be
retightened during installation as the bolts may have
loosened due to storage and shipping.
Assembly body should not be painted.
• Before installing any Ames assembly, flush the line thoroughly to
remove all debris, chips and other foreign objects. Failure to do so
may make the assembly inoperable.
• Ames 4000SS Reduced Pressure backflow preventers are ap-
proved by Asse (American Society of Sanitation Engineers) to be in-
stalled in horizontal positions. Local water authorities must approve
all installation configurations.
• Allow sufficient clearance around the installed assembly to conduct
testing, servicing, and inspection. Allow a minimum of 12" from the
flood level to the bottom of the assembly.
• The 4000SS assembly is not recommended for pit installations.
Where necessary, an air gap drain may be connected to the relief
valve to minimize flooding of the surrounding area. Flooding may
cause a cross-connection. Contact local code authorities for proper
installations.
• If installing on fire protection system, purge air from the fire system.
Fill the system slowly with all inspectors test valves open.
Installation Guidelines
Indoor Installation
Outdoor Installation
