4 909RPDA-LF-GPM

Item Number: 0387209
1 1
$16,517.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 inch
  • Weight: 385.0 lb
  • Body Material: Cast Iron
  • Coating: ArmorTek Epoxy Coated
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F – 140°F
  • Meter: Gallons per Minute (GPM)
  • Flood Detection: Sensor on Relief Valve
  • Approvals: UL Classified, FM Approved

Description

The Watts 909RPDA 4 inch Reduced Pressure Detector Assembly is a backflow preventer designed to safeguard potable water supplies from contamination by fire protection system substances. This assembly, without shutoff valves, features a durable cast iron body with advanced ArmorTek epoxy coating for corrosion resistance. It includes a gallon per minute meter for leak detection and unauthorized water use monitoring. Engineered for continuous pressure piping applications and health hazard cross-connections, it provides maximum flow at low pressure drop and incorporates a relief valve sensor for flood detection. Approved by UL and FM, it operates within 33°F to 140°F and handles up to 175 PSI.
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Additional Details

The Watts 909RPDA 4 inch Reduced Pressure Detector Assembly is designed to protect potable water supplies from the reverse flow of fire protection system substances due to backsiphonage or backpressure. It is ideal for continuous pressure piping applications and cross-connections identified as health hazards.

This assembly comes without shutoff valves and includes a gallon per minute meter for detecting underground leaks and unauthorized water use.

Construction & Design

  • Features cast iron body construction with fused epoxy coating.
  • Utilizes ArmorTek coating technology to resist corrosion of internals, limiting microbial induced corrosion (MIC) and exposed metal substrate corrosion.
  • Incorporates captured spring check valves, replaceable stainless steel seats, and top mounted test cocks.
  • The air-in/water-out relief valve design provides maximum capacity during emergency conditions.
  • Designed for maximum flow at low pressure drop and offers design simplicity for easy maintenance.
  • Equipped with a 5/8" x 3/4" (16 x 19 mm) meter.

Flood Detection Features

  • Includes a sensor on the relief valve for flood detection.
  • Flood alerts are activated with an add-on sensor connection kit, compatible with BMS and cell network communication.

Specifications

  • Body Material: Cast Iron
  • Coating: ArmorTek Powder Coating (internal & external surfaces)
  • Seat and Disc Holder: Stainless Steel
  • Discs: Rubber
  • Trim: Stainless Steel
  • Test Cocks: Bronze
  • Size: 4 inch
  • Assembly Type: Reduced Pressure Detector Assembly (RPDA)
  • Shutoff Valves: No Shutoff (LF)
  • Meter: Gallons per Minute (GPM) Meter (5/8" x 3/4" (16 x 19 mm))
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Flood Detection: Sensor on Relief Valve

Certificates & Approvals

  • Standards: AWWA C511-92
  • Standards: CSA B64
  • Approvals: UL Classified
  • Approvals: FM Approved
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

What is the primary purpose of the Watts 909RPDA 4 inch assembly?

The primary purpose is to protect potable water supplies from contamination caused by the reverse flow of substances from fire protection systems, due to backsiphonage or backpressure.

What is the construction material of the 909RPDA backflow preventer?

The body is constructed from cast iron and features a fused epoxy coating with ArmorTek technology for enhanced corrosion resistance, both internally and externally.

Does this model include shutoff valves?

No, this specific 909RPDA model is supplied without shutoff valves, denoted by "LF" (Less Shutoff Valves).

What is the function of the included gallon per minute meter?

The gallon per minute meter is included to help detect underground leaks and monitor for any unauthorized water use within the system.

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

This assembly is designed for a continuous temperature range of 33°F to 140°F (0.5°C to 60°C) and can handle a maximum working pressure of 175 PSI (12.1 bar).

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