The 3 inch Ames Deringer 40 Reduced Pressure Zone (RP) backflow preventer assembly is designed to protect potable water systems from hazardous contaminants and non-health hazard pollutants caused by backpressure or backsiphonage. It features a 100% stainless steel housing, integral butterfly shutoff valves, prewired supervisory switches, and tamper-resistant test cocks. A SentryPlus Alert® flood sensor detects relief valve discharges. This assembly operates within a 10-175 psi working pressure and 33-140°F temperature range. It is UL, FM, ASSE 1013, AWWA C511-07, ANSI/NSF/CAN 61 & 372, and Lead Free certified.
Help Me Connect
End Connections
The assembly features IPS grooved ends designed for connection to steel pipe in accordance with AWWA C606.
It is also compatible with flange adapters that meet ANSI B16.1 Class 125 standards.
This 3 inch Ames Deringer 40 Reduced Pressure Zone (RP) assembly prevents hazardous contaminants and non-health hazard pollutants from entering potable water supply systems due to backpressure or backsiphonage conditions. It is designed for continuous pressure service and includes integral butterfly shutoff valves.
Features
Integral Eccentric-Seal™ butterfly shutoff valves designed for indoor or outdoor application, offering a shorter lay length and lightweight construction.
100% stainless steel housing ensures durability.
Tamper-resistant test cocks provide security.
Stainless steel braided wire sensing line for reliability.
Patented Dual-action™ second check module provides optimal performance: Poppet action at low flow and Swing action at high flow.
Balanced chamber relief valve requires no sliding seals.
Poppet action first check for more reliable relief valve closure.
Prewired supervisory switches for monitoring.
IPS grooved ends for easy connection.
Flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve, with optional add-on sensor connection kits for alert notification.
True-Seal™ and Dual-Action™ checks ensure high performance at low and high-flow rates.
Specifications
Assembly Type: Reduced Pressure Zone (RP) Backflow Preventer
Nominal Size: 3 Inch
Model: Deringer 40
Maximum Working Pressure: 175 psi
Minimum Working Pressure: 10 psi
Temperature Range: 33°F - 140°F
Materials
Valve Housing: 304 Stainless Steel
Valve Cover: 304 Stainless Steel
Shutoff Valve Disks: EPDM/304SS
Shutoff Valve Shafts: 304 Stainless Steel
Relief Valve Spring: 302 Stainless Steel
Shutoff Valve Bearings: PTFE Fluoropolymer/Bronze
Non-wetted Bolts: Grade 8 Zinc Plated
Check Disks: Silicone (NSF)
Wetted Fasteners: 18-8 Stainless Steel
Relief Valve Housing: 304 Stainless Steel
Check Springs: 17-7 Stainless Steel
Check Pins: 17-7/18-8 Stainless Steel
Check Seats: Noryl® Polymer (NSF)
O-rings: Buna-N (NSF)
Relief Valve Hose: Braided Stainless Steel Wire
Certificates & Approvals
AWWA C511-07 Compliant
ANSI/NSF/CAN 61
UL Certified Health Effects
UL Certified to ANSI/NSF/CAN 372
LEAD FREE
FM Approved
ASSE 1013
CULUS Water Quality ANSI/NSF/CAN 61 & 372
FAQs
What is the primary function of the Ames Deringer 40 RP backflow preventer?
This 3 inch backflow preventer is designed to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system caused by backpressure and/or backsiphonage conditions.
What type of shutoff valves are included with this assembly?
The Deringer 40 assembly includes integral Eccentric-Seal™ butterfly shutoff valves. These are designed for both indoor and outdoor applications.
Does this backflow preventer include a flood sensor?
Yes, this backflow assembly contains a flood sensor with SentryPlus Alert® technology. It is designed to detect excessive water discharges from the relief valve.
What are the primary end connection types for this 3-inch assembly?
This assembly is designed with IPS grooved ends for steel pipe, compliant with AWWA C606. It is also compatible with flange adapters per ANSI B16.1 Class 125.
What certifications does the Deringer 40 RP assembly hold?
The Deringer 40 RP assembly is AWWA C511-07 Compliant, ANSI/NSF/CAN 61 & 372 certified, UL Certified for Health Effects, FM Approved, ASSE 1013 classified, and certified LEAD FREE.
