Estimated transit time: 2 to 5 Business DaysEligible for Express Shipping
Brand - Deringer
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Size: 2 1/2 inch
Weight: 59.0 lb
Housing Material: 304 Stainless Steel
Maximum Working Pressure: 175 psi
Temperature Range: 33°F - 140°F
Features SentryPlus Alert™ flood sensor technology
Integral Eccentric-Seal™ butterfly shutoff valves
Dual-action™ check module for optimal flow
Lead free bronze bypass components
Description
The Ames Deringer 50 Reduced Pressure Detector Backflow Preventer Assembly, 2 1/2 inch, with GPM meter, is designed to protect potable water systems from non-health hazard pollutants and hazardous contaminants caused by backpressure or backsiphonage. Ideal for fire sprinkler systems requiring unauthorized water use monitoring, it features a 100% stainless steel housing, integral butterfly shutoff valves for short lay length, and Dual-action™ checks for reliable performance across flow rates. A SentryPlus Alert™ flood sensor detects excessive relief valve discharge. This assembly is rated for 10-175 psi and meets AWWA C511-07, ANSI/NSF/CAN 61, and ASSE 1047-2021 standards. Item number D-2550-GPM.
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Connections
This assembly features IPS grooved ends for connection to steel pipe, compliant with AWWA C606 standards.
It can also be connected using flange adapters, which are compatible with ANSI B16.1 Class 125.
The 2 1/2 inch size specifically utilizes a 2 1/2 inch assembly with a 2 1/2 inch groove to 2 inch female NPT adapter and couplings. Please note that the adapter and couplings ship unassembled.
The Ames Deringer™ 50 Reduced Pressure Detector Backflow Preventer Assembly prevents non-health hazard pollutants and hazardous contaminants from entering a potable water supply system due to backpressure and/or backsiphonage conditions. This 2 1/2 inch assembly is primarily used on fire sprinkler systems where monitoring of unauthorized water use is required, featuring a GPM meter and integral butterfly shutoff valves.
Key Features
Features a flood sensor with SentryPlus Alert™ technology to detect excessive water discharges from the relief valve, with optional add-on connection kits for BMS and cellular communications.
Integral Eccentric-Seal™ butterfly shutoff valves provide a shorter lay length and lightweight construction.
Dual-action™ check module ensures high performance with poppet action for low flow and swing action for high flow.
100% stainless steel housing for durability and corrosion resistance.
Includes prewired supervisory switches for enhanced monitoring.
Tamper-resistant test cocks for secure operation.
Balanced chamber relief valve operates using only static seals (zero dynamic/sliding seals) for reliable performance.
Patented first check for more reliable relief valve closure.
Lead free bronze bypass components ensure safety and compliance.
Application: Fire Protection, Waterworks, Plumbing, Irrigation
Materials
Valve Housing: 304 Stainless Steel
Valve Cover: 304 Stainless Steel
SOV Disks: EPDM/304SS
SOV Shafts: 304 Stainless Steel
Bypass Spring: 302 Stainless Steel
RV Spring: 302 Stainless Steel
SOV Bearings: PTFE Fluoropolymer/Bronze
Non-wetted Bolts: Grade 8 Zinc Plated
Check Disks: Silicone (NSF)
Wetted Fasteners: 18-8 Stainless Steel
Bypass Components: Lead Free Bronze
RV 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)
Bypass Internals: ABS Polymer (NSF)
RV Hose: Braided Stainless Steel Wire
Dimensions (approximate)
Length (L): 18.7 inch (475 mm)
Height (Ht): 7.1 inch (180 mm)
Height (Hb): 8.7 inch (221 mm)
Depth (D): 0.0 inch (0 mm)
Overall Height (H): 15.8 inch (401 mm)
Width (W): 11.0 inch (279 mm)
Weight: 47 lb (21 kg)
Connections
Standard End Connections: IPS Groove for Steel Pipe
Optional End Connections: Flange Adapters
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 1047-2021
FAQs
What is the primary purpose of the Deringer™ 50 Reduced Pressure Detector Assembly?
Its primary purpose is to prevent non-health hazard pollutants and hazardous contaminants from entering a potable water supply system due to backpressure or backsiphonage conditions. It is commonly used in fire sprinkler systems to monitor unauthorized water usage.
What is the housing material for this backflow preventer?
The Deringer™ 50 Reduced Pressure Detector Assembly features a durable housing constructed entirely of 304 stainless steel, ensuring longevity and corrosion resistance.
Does this model include a water meter?
Yes, this specific Deringer™ 50 model includes a GPM (Gallons Per Minute) meter in its bypass assembly, which is used to register water flow for monitoring purposes.
What type of connections does this assembly have?
This assembly comes with IPS grooved ends for connection to steel pipe and is also compatible with flange adapters that meet ANSI B16.1 Class 125 standards. The 2 1/2 inch size uses specific grooved-to-NPT adapters.
What is the function of the SentryPlus Alert™ technology?
The SentryPlus Alert™ technology includes a flood sensor designed to detect excessive water discharges from the relief valve. When connected with an optional kit, it can send alerts to notify personnel of potential flooding.
