4 4000SS-OSY-FS

Item Number: F0690496
1 1
$10,328.28
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Nominal Size: 4 inch
  • Weight: 323.0 lb
  • Reduced Pressure Zone Backflow Preventer
  • Integrated Flood Sensor with SentryPlus Alert® Technology
  • Main Valve Body Material: 300 Series Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Lead Free Construction
  • Outside Stem and Yoke (OSY) Shutoff Valves
  • AWWA C511-92, ASSE 1013, CSA B64.5, UL, FM Approved

Description

This 4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly with OSY shutoff valves is designed to prevent contamination of potable water supplies from backsiphonage and backpressure. It features a lightweight, compact 300 Series stainless steel body and Noryl check assembly for corrosion resistance and easy maintenance. An integrated flood sensor with SentryPlus Alert® technology detects excessive relief valve discharge, relaying alerts when paired with a connection kit. Ideal for continuous pressure applications and health hazard cross-connections, it offers reliable performance with a maximum working pressure of 175 psi and broad regulatory approvals.

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Connections

  • This assembly is designed for installation at cross-connections to prevent backflow into potable water supplies.
  • The unit includes resilient seated Outside Stem and Yoke (OSY) shutoff valves.
  • Flange dimensions are in accordance with AWWA Class D.
  • The integrated flood sensor requires an add-on connection kit (sold separately) for communication via BMS, cellular, or Wi-Fi to the Nexa® platform or BAS.
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Additional Details

This 4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly is designed to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply due to backsiphonage or backpressure. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs.

Features

  • Equipped with a flood sensor featuring SentryPlus Alert® technology to detect excessive water discharge from the relief valve.
  • Sensor activated with an add-on connection kit (sold separately) to relay alerts for potential flooding events.
  • Connection kit options include BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
  • Main valve body and internal metal parts are constructed from 300 Series stainless steel for corrosion resistance.
  • Check assembly made of Noryl®.
  • Short end-to-end dimensions make retrofitting easier.
  • Cam-check assembly provides maximum flow at low pressure drop.
  • Stainless steel relief valve features a balanced rolling diaphragm, eliminating sliding seals and lowering maintenance costs.
  • Compact construction for smaller enclosures.
  • Includes resilient seated Outside Stem and Yoke (OSY) shutoff valves and four ball type test cocks.

Specifications

General

  • Nominal Size: 4 inch
  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Shutoff Valves: Outside Stem and Yoke (OSY)
  • Flood Detection: Integrated Flood Sensor with SentryPlus Alert® Technology
  • Main Valve Body Material: 300 Series Stainless Steel
  • Internal Metal Parts Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®
  • Lead Free: Yes
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 110°F (0.5°C – 43°C)

Dimensions (Nominal 4 inch)

  • Overall Length (A): 40 in (1016 mm)
  • OSY Shutoff Valve Height (C (OSY)): 22 3/4 in (578 mm)
  • Distance Between Shutoff Valve Centers (D): 10 1/2 in (267 mm)
  • Top-of-Assembly Height (G): 10 in (254 mm)
  • Length from Inlet to Center of Relief Valve (L): 22 in (559 mm)
  • Width of Relief Valve Assembly (M): 12 1/8 in (308 mm)
  • Distance from Relief Valve to Bottom (N): 8 1/4 in (210 mm)
  • Depth of Base (P): 9 in (229 mm)
  • Weight with Gates: 235 lb (107 kg)
  • Weight without Gates: 65 lb (30 kg)

Certificates & Approvals

  • AWWA: C511-92
  • ASSE: 1013
  • CSA: B64.5
  • UL Classified: Yes
  • FM Approved: Yes

FAQs

What is the primary function of this backflow preventer assembly?

Its primary function is to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply, protecting against contamination due to backsiphonage or backpressure.

What kind of flood detection technology is included?

This assembly includes an integrated flood sensor with SentryPlus Alert® technology, designed to detect excessive water discharge from the relief valve and relay alerts when connected to an optional kit.

What materials are used in the construction of this backflow preventer?

The main valve body and all internal metal parts are constructed from 300 Series stainless steel for corrosion resistance, while the check assembly is made of Noryl®. It features Lead Free construction.

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

The maximum working pressure for this backflow preventer is 175 psi (12.1 bar), and it is designed to operate within a temperature range of 33°F to 110°F (0.5°C to 43°C).

Does this backflow preventer have any certifications or approvals?

Yes, it is approved by AWWA C511-92, ASSE 1013, CSA B64.5, UL Classified, and FM Approved, ensuring compliance with relevant industry standards.

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