2 1/2 DERINGER 40 (RP)

Item Number: D-2540
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$2,997.13
Limited Stock (3)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Deringer
  • Size: 2 1/2 inch
  • Weight: 51.0 lb
  • Lead Free Construction
  • Housing Material: 304 Stainless Steel
  • Working Pressure: 10-175 psi
  • Temperature Range: 33°F-140°F
  • Connections: IPS Grooved Ends
  • Features Flood Sensor with SentryPlus Alert
  • Dual-Action Check Module

Description

The Ames Deringer 40 Reduced Pressure Zone Backflow Preventer, model D-2540, is a 2 1/2 inch lead-free assembly engineered to protect potable water systems from hazardous contaminants and non-health hazard pollutants caused by backpressure or backsiphonage. Featuring a durable 304 stainless steel housing, integral shutoff valves, and IPS grooved ends for steel pipe connections, it offers reliable performance. This unit includes a patented dual-action check module for optimal flow rates and a flood sensor with SentryPlus Alert technology to detect excessive relief valve discharges. It operates within a 10-175 psi working pressure and 33-140°F temperature range.

Help Me Connect

Connecting Your 2 1/2 inch Deringer 40 RP Backflow Preventer

This 2 1/2 inch backflow preventer assembly is designed with IPS grooved ends for direct connection to steel pipe, in compliance with AWWA C606. For installations requiring flanged connections, the unit is compatible with flange adapters conforming to ANSI B16.1 Class 125; these adapters are sold separately.

Note: The 2 inch size variant of this assembly uses a 2 1/2 inch assembly with 2 1/2 inch groove to 2 inch female NPT adapter and couplings, which ship unassembled. This D-2540 model is the native 2 1/2 inch grooved assembly.

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Additional Details

The Ames Deringer™ 40 Reduced Pressure Zone Backflow Preventer Assembly is a 2 1/2 inch lead-free device designed to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system due to backpressure or backsiphonage conditions.

This assembly features a compact design with integral shutoff valves and a flood sensor for enhanced system protection.

Key Features

  • Lead Free construction, meeting stringent health standards.
  • Integral Shutoff Valves designed for indoor or outdoor applications, contributing to a shorter lay length.
  • 100% Stainless Steel Housing ensures durability and corrosion resistance.
  • Patented Dual-Action™ Second Check Module provides optimal performance at both low and high flow rates (poppet action at low flow, swing action at high flow).
  • Balanced Chamber Relief Valve requires no sliding seals for reliable operation.
  • Prewired Supervisory Switches for easy integration into monitoring systems.
  • Tamper-Resistant Test Cocks for security and accurate testing.
  • Stainless Steel Braided Wire Sensing Line for reliable internal monitoring.
  • Flood Sensor with SentryPlus Alert® Technology detects excessive water discharges from the relief valve, with optional add-on kits for BMS and cellular notifications.

Connections

  • Equipped with IPS grooved ends for steel pipe connections, compliant with AWWA C606.
  • Compatible with flange adapters conforming to ANSI B16.1 Class 125 (available separately).

Specifications

  • Product Size: 2 1/2 inch
  • Model: Deringer 40
  • Valve Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disks Material: EPDM/304SS
  • SOV Shafts Material: 304 Stainless Steel
  • RV Spring Material: 302 Stainless Steel
  • SOV Bearings Material: PTFE Fluoropolymer/Bronze
  • Non-Wetted Bolts Material: Grade 8 Zinc Plated
  • Check Disks Material: Silicone (NSF)
  • Wetted Fasteners Material: 18-8 Stainless Steel
  • RV Housing Material: 304 Stainless Steel
  • Check Springs Material: 17-7 Stainless Steel
  • Check Pins Material: 17-7/18-8 Stainless Steel
  • Check Seats Material: Noryl® Polymer (NSF)
  • O-rings Material: Buna-N (NSF)
  • RV Hose Material: Braided Stainless Steel Wire

Performance

  • Temperature Range: 33°F - 140°F
  • Working Pressure: 10 - 175 psi

Dimensions (Approximate)

  • Height (Ht): 7.1 inches (180 mm)
  • Height (Hb): 8.7 inches (221 mm)
  • Length (L): 18.7 inches (475 mm)
  • Distance (D): 0.0 inches (0 mm)
  • Overall Height (H): 15.8 inches (401 mm)
  • Width (W): 11.0 inches (279 mm)
  • Weight: 42 lbs (19 kg)

Certificates & Approvals

  • AWWA C511-07 Compliant
  • ANSI/NSF/CAN 61
  • UL Certified Health Effects
  • UL Certified to ANSI/NSF/CAN 372
  • LEAD FREE
  • cULus Water Quality (ANSI/NSF/CAN 61 & 372)
  • FM Approved
  • USC Approved
  • ASSE 1013

FAQs

What is the primary purpose of the Deringer 40 Reduced Pressure Zone Backflow Preventer?

The Deringer 40 RPZ assembly is designed to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system under conditions of backpressure or backsiphonage.

What material is the valve housing made from?

The valve housing of the Deringer 40 RPZ backflow preventer is constructed from 100% 304 Stainless Steel, ensuring durability and corrosion resistance.

What are the connection types for this 2 1/2 inch backflow preventer?

This 2 1/2 inch assembly features IPS grooved ends suitable for steel pipe connections. It is also compatible with ANSI B16.1 Class 125 flange adapters, which are sold separately.

Does this backflow preventer include a flood detection feature?

Yes, it includes a flood sensor with SentryPlus Alert® Technology to detect excessive water discharges from the relief valve. Optional add-on connection kits are available for BMS and cellular notifications.

What are the operating pressure and temperature limits for this device?

The Deringer 40 RPZ assembly has a working pressure range of 10 to 175 psi and an operating temperature range of 33°F to 140°F.

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