Internal relief valve for reduced installation clearances
Approved to ASSE Std. 1013 and CSA B64.4
Description
This 2 inch AMES 4000B Reduced Pressure Zone Backflow Preventer Assembly with OSY shutoffs protects drinking water supplies from dangerous cross-connections, back-siphonage, and backpressure in health-hazard applications. Constructed with a durable bronze body, it features two in-line check valves, an intermediate relief valve, and resilient seated outside stem and yoke gate valves. Its compact modular design and single access cover ensure easy maintenance and economical repair with replaceable seats. Suitable for continuous pressure applications up to 175 PSI and 180°F, this assembly meets AWWA C511-92, ASSE Std. 1013, and CSA B64.4 standards. Item number 0691390.
Help Me Connect
Connections
This assembly features NPT body connections for standard installation.
The inlet and outlet shutoffs are resilient seated outside stem and yoke (OSY) gate valves.
This 2 inch reduced pressure zone backflow preventer assembly is designed to protect drinking water supplies from dangerous cross-connections due to back-siphonage and/or backpressure. It is suitable for health-hazard non-potable service applications such as irrigation, fire line, or industrial processing.
Features
Single access cover and modular check construction for ease of maintenance
Top entry with all internals immediately accessible
Captured springs for safe maintenance
Internal relief valve for reduced installation clearances
Replaceable seats for economical repair
Bronze body construction for durability
Screwdriver slotted ball valve test cocks
Large body passages provide low pressure drop
Compact, space saving design
No special tools required for servicing
Resilient seated outside stem and yoke (OSY) gate valves
It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Consult your local water authority, building, and plumbing codes before installation.
Specifications
Size: 2 inch (50mm)
Body Material: Bronze
Check Valve Type: Two in-line independent check valves
Shutoffs: Resilient seated outside stem and yoke (OSY) gate valves
Test Cocks: Four resilient seated, screwdriver slotted ball valve test cocks
Maximum Supply Pressure: 175 PSI (12.06 bar)
Maximum Water Temperature: 180°F (75°C) continuous
Internal Components
Check Seat Material: Replaceable polymer
Check Disc Material: Silicone rubber (first and second check)
Relief Valve Seat: Removable stainless steel
Cover Bolts: Stainless steel
Springs: Captured
Connections
Body Connections: NPT
Dimensions (approximate)
Overall Length (A): 21 3/8 inch (543 mm)
Overall Height (B): 7 3/4 inch (197 mm)
Centerline to Top (C): 4 1/2 inch (114 mm)
Depth (D): 3 1/4 inch (83 mm)
Weight
Product Weight: 30.00 lbs (13.6 kg)
Certificates & Approvals
AWWA C511-92
USC Manual 8th Edition
IAPMO File No. 1563
ASSE Std. 1013
CSA B64.4
Approved by Foundation for Cross-Connection Control and Hydraulic Research at University of Southern California
FAQs
What is the primary purpose of this backflow preventer assembly?
This 2 inch AMES 4000B assembly is designed to protect drinking water supplies by preventing polluted water from entering the potable system due to back-siphonage or backpressure from cross-connections.
What type of shutoff valves are included with this assembly?
This assembly includes resilient seated outside stem and yoke (OSY) gate valves on both the inlet and outlet, which allow for visual confirmation of valve position.
What are the maximum operating pressure and temperature ratings?
The assembly is suitable for supply pressures up to 175 PSI (12.06 bar) and water temperatures up to 180°F (75°C) for continuous operation.
Is this backflow preventer easy to maintain?
Yes, its compact modular design features a single access cover, allowing all internal components to be immediately accessible for easy in-line maintenance and economical repair with replaceable seats. No special tools are required for servicing.
What certifications does this backflow preventer hold?
This assembly meets various standards and approvals including AWWA C511-92, USC Manual 8th Edition, IAPMO File No. 1563, ASSE Std. 1013, and CSA B64.4.
