3 909RPDA-DOSY-GPM

Item Number: 0389337
1 1
$19,911.72
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 250.0 lb
  • Body Material: Cast iron
  • Coating: ArmorTek epoxy coated
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Shutoff Valves: OSY resilient seated gate valves
  • Flood Detection: Relief valve sensor included
  • Meter: GPM meter included

Description

The 3 inch Watts 909RPDA Reduced Pressure Detector Assembly Backflow Preventer is engineered for health hazard applications in fire protection systems. It effectively prevents the reverse flow of non-potable substances into potable water supplies. This assembly features a robust cast iron body with patented ArmorTek® epoxy coating for superior corrosion resistance and includes UL/FM approved OSY shutoff valves. An integrated GPM meter aids in detecting leaks, while a relief valve sensor offers flood detection capabilities, enhancing system integrity. Designed for easy maintenance and maximum flow at low pressure drop, it operates continuously from 33°F to 140°F at 175 PSI.

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Connections and Applications

  • This assembly is designed for installation on fire protection systems when connected to a public water supply.
  • It is mandatory for applications where there is a health hazard due to potential reverse flow of fire protection system substances into potable water.
  • The integral flood sensor requires an add-on sensor connection kit (sold separately) to activate its alert features, compatible with Building Management Systems (BMS) and cellular network communication.
  • Use Series 909AG air gaps when installing a drain line on Model 909 backflow preventers.
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Additional Details

This 3 inch 909RPDA Reduced Pressure Detector Assembly Backflow Preventer is designed for health hazard applications in fire protection systems, preventing reverse flow of non-potable substances into the potable water supply.

It utilizes a unique relief valve construction with an air-in/water-out principle to stop potential backflow effectively.

Key Components

  • Epoxy coated cast iron body for durability
  • Domestic OSY resilient seated gate valves that are UL Classified and FM Approved
  • Captured spring check valves
  • Replaceable stainless steel seats
  • Top mounted test cocks (bronze)
  • Pressure differential relief valve
  • Integrated GPM meter for detecting underground leaks and unauthorized water use

Advanced Protection

  • Features ArmorTek® coating technology, a patented three-part advanced epoxy system, engineered to resist both microbial-induced corrosion (MIC) and exposed metal substrate corrosion on internal and external surfaces.
  • Includes a flood sensor on the relief valve to detect excessive water discharges, which can trigger alerts when used with an add-on sensor connection kit (sold separately).

Design & Performance

  • Provides maximum flow at low pressure drop.
  • Compact design combines economy with performance.
  • Simple design facilitates easy maintenance.
  • No special tools required for assembly or maintenance.

Specifications

  • Product Type: Reduced Pressure Detector Assembly Backflow Preventer
  • Nominal Size: 3 inch
  • Body Material: Cast iron
  • Coating: ArmorTek powder coating, epoxy coated (internal and external surfaces)
  • Coating Technology: Patented 3-part advanced epoxy system
  • Seat and Disc Holder Material: Stainless steel
  • Discs Material: Rubber
  • Trim Material: Stainless steel
  • Test Cocks Material: Bronze
  • Meter Type: 5/8 inch x 3/4 inch (16 x 19 mm) GPM meter
  • Shutoff Valves: UL Classified and FM Approved OSY resilient seated gate valves
  • Flood Detection: Sensor on relief valve included

Performance Ratings

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C) continuous

Certificates & Approvals

  • AWWA C511-92
  • ASSE 1047
  • UL Classified (File No. EX3185)
  • CSA B64
  • USC Manual for Cross-connection Control, 8th Edition
  • FM Approved

FAQs

What is the primary application of this backflow preventer?

This 3 inch reduced pressure detector assembly is specifically designed for health hazard cross-connections within fire protection systems, preventing contamination of the potable water supply.

What kind of coating does this backflow preventer use?

It features ArmorTek® coating technology, which is a patented three-part advanced epoxy system. This coating is applied to both internal and external surfaces to resist microbial-induced corrosion (MIC) and protect the metal substrate.

Does this assembly include a meter?

Yes, this backflow preventer assembly is furnished with a GPM (gallons per minute) meter. This meter is used to detect underground leaks and unauthorized water usage within the system.

What is the function of the flood sensor?

The flood sensor is installed on the relief valve to detect excessive water discharges. When activated with an add-on sensor connection kit (sold separately), it can relay a signal for notification, helping to prevent flooding and costly damage.

What are the maximum operating pressure and temperature for this unit?

This reduced pressure detector assembly has a maximum operating pressure of 175 psi (12.1 bar). It can operate continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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