4 909RPDA-OSY-GPM-FS

Item Number: 88009334
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$23,255.10
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 inch
  • Weight: 597.0 lb
  • Body Material: Cast iron with ArmorTek® epoxy coating
  • Shutoff Valves: OSY resilient seated gate valves
  • Meter: Gallons per minute (GPM) meter
  • Features: Flood sensor with SentryPlus Alert® technology
  • Corrosion Resistance: ArmorTek® advanced epoxy coating
  • Seats: Replaceable stainless steel
  • Maximum Working Pressure: 175 psi

Description

This 4 inch Watts Series 909RPDA Reduced Pressure Detector Assembly backflow preventer protects potable water supplies from contamination by fire protection system substances. Its cast iron body features ArmorTek® advanced epoxy coating for superior corrosion resistance, including microbial-induced corrosion. Equipped with OSY shutoff valves and a GPM meter for detecting leaks and unauthorized water use, this assembly also includes a SentryPlus Alert® flood sensor to detect relief valve discharges and notify personnel, preventing costly damage. It is approved by AWWA, ASSE, UL, CSA, and USC. Item number 88009334.

Help Me Connect

Flood Sensor Activation & Connectivity

  • The integrated flood sensor with SentryPlus Alert® technology requires an add-on connection kit (sold separately) for activation.
  • Connection kit options include BMS (Building Management System), cellular communication, or the Sensor Control Monitor.
  • The Sensor Control Monitor enables integration with BAS (Building Automation Systems) via RS-485 Modbus or the Nexa® platform through Wi-Fi.
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Additional Details

This 4 inch Watts Series 909RPDA Reduced Pressure Detector Assembly backflow preventer is designed for health hazard applications in fire protection systems. It prevents the reverse flow of fire protection system substances, such as glycerin wetting agents or stagnant water, into the potable water supply due to backsiphonage or backpressure.

Key Components

  • Epoxy coated cast iron body
  • OSY resilient seated gate valves
  • Captured spring check valves
  • Replaceable stainless steel seats
  • Top mounted test cocks
  • Pressure differential relief valve
  • GPM meter for detecting underground leaks and unauthorized water use

ArmorTek® Coating Technology

  • Patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC)
  • Protects exposed metal substrate
  • Applied to both internal and external surfaces of the backflow preventer

SentryPlus Alert® Flood Sensor

  • Detects excessive water discharges from the relief valve
  • Sensor is installed on the assembly exterior and does not alter assembly functions or certifications
  • Relays a signal that triggers notification to facility personnel for corrective action, thus limiting flooding and costly damage
  • Requires an add-on connection kit (sold separately) to activate flood alert features

Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge.

Watts is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.

The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.

Specifications

  • Body Material: Cast Iron, Fused Epoxy Coated
  • Valve Type: OSY Resilient Seated Gate Valves
  • Seats: Replaceable Stainless Steel
  • Discs: Rubber
  • Trim: Stainless Steel
  • Test Cocks: Bronze
  • Meter: 5/8" x 3/4" (16 x 19 mm) GPM Meter
  • Nominal Size: 4 inch

Performance

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

Approvals & Standards

  • AWWA Standard: C511-92
  • ASSE Standard: 1047
  • UL Classification: Classified File No. EX3185
  • CSA Standard: B64
  • USC Manual: 8th Edition for Cross-connection Control
  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

What is the primary use of the Watts 909RPDA backflow preventer?

The Watts 909RPDA Reduced Pressure Detector Assembly is used in health hazard applications for fire protection systems, preventing reverse flow of non-potable substances into the potable water supply.

What is ArmorTek® coating and why is it important?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the internal and external surfaces of the cast iron body. It is engineered to resist microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the longevity of the assembly.

Does this backflow preventer include a flood sensor?

Yes, this assembly includes a flood sensor with SentryPlus Alert® technology, designed to detect excessive water discharges from the relief valve. An add-on connection kit (sold separately) is required to activate its alert features.

What type of meter is included with this assembly?

The assembly comes furnished with a 5/8" x 3/4" (16 x 19 mm) Gallons Per Minute (GPM) meter. This meter is used to detect underground leaks and unauthorized water use.

What are the key approvals for this Watts 909RPDA model?

This backflow preventer meets AWWA C511-92, ASSE 1047, UL Classified File No. EX3185, CSA B64, and USC Manual 8th Edition standards. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California.

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