6 994-OSY-FS

Item Number: F438057
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$17,702.05
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Weight: 425.0 lb
  • Model: Watts Series 994 Reduced Pressure Zone Assembly
  • Body Material: 300 Series Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Equipped with SentryPlus Alert® flood sensor
  • UL Classified and FM Approved OSY gate valves
  • Lead Content: Less than 0.25% by weight (wetted surface)
  • Temperature Range: 33°F-110°F continuous

Description

The Watts Series 994 6 inch Reduced Pressure Zone Assembly Backflow Preventer safeguards potable water from hazardous cross-connections caused by backsiphonage or backpressure. This lead-free unit features a durable 300 Series stainless steel body and UL Classified, FM Approved OSY gate valves for reliable isolation. A SentryPlus Alert® flood sensor detects excessive relief valve discharge, offering a critical safety feature. Its compact, lightweight design with a short lay length simplifies installation and maintenance. Suitable for health hazard applications, this backflow preventer ensures compliance and robust protection with a maximum working pressure of 175 psi. Item number F438057.

Help Me Connect

Connections

  • The Watts Series 994 6 inch backflow preventer features flanged connections for installation into your potable water supply system.
  • Flange dimensions are in accordance with AWWA Class D standards.
  • It includes Outside Stem and Yoke (OSY) resilient seated gate valves for system isolation.
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Additional Details

This Watts Series 994 6 inch Reduced Pressure Zone Assembly Backflow Preventer is designed to protect potable water supplies from backsiphonage and backpressure of hazardous materials at cross-connections. It features a compact modular design for easy maintenance and a SentryPlus Alert® flood sensor to detect excessive relief valve discharge.

Key Features

  • Equipped with a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
  • Supports integration with a Sensor Control Monitor for maintenance alerts via BAS (RS-485 Modbus) or the Nexa® platform (Wi-Fi connectivity) using an add-on connection kit.
  • UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
  • Bottom mounted relief valve reduces clearance requirements for installations against outside walls.
  • No special tools are required for servicing, simplifying maintenance.

Construction & Design

  • Constructed with a stainless steel body for long-term corrosion resistance and maximum strength.
  • Features a short lay length and a lightweight body, reducing installation and shipping costs.
  • Incorporates patented torsion spring check valves for maximum flow at low pressure drop.
  • Thermoplastic and stainless steel check valves ensure trouble-free operation.
  • Stainless steel relief valve with a balanced rolling diaphragm eliminates sliding seals and lowers maintenance costs.
  • Compact design allows for installation in smaller enclosures.

An add-on connection kit is required to activate the flood sensor's communication features; without it, the sensor is passive. Watts is not responsible for alert failures due to connectivity issues, power outages, or improper installation. The flood sensor does not replace the need to comply with all required installation, operation, and maintenance regulations, including providing proper drainage for discharge.

Specifications

  • Size: 6 inch
  • Model Series: Watts Series 994
  • Type: Reduced Pressure Zone Assembly
  • Shutoff Valves: OSY (Outside Stem and Yoke) Resilient Seated Gate Valves
  • Flood Sensor: Yes, with SentryPlus Alert® Technology
  • Lead Content: Wetted surface contains less than 0.25% lead by weight

Materials

  • Main Valve Body Material: 300 Series Stainless Steel
  • All Internal Metal Parts Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F-110°F (0.5°C - 43°C) continuous

Connections

  • Flange Dimension Standard: AWWA Class D

Dimensions & Weight (6 inch)

  • Overall Length (A): 48 1/2 inch (1232 mm)
  • Length (C OSY): 30 1/8 inch (765 mm)
  • Relief Valve Height (D): 11 1/2 inch (292 mm)
  • Pipe Center to Test Cock (P): 11 inch (279 mm)
  • Weight with Gate Valves: 380 lb (172 kg)
  • Weight without Gate Valves: 110 lb (50 kg)

Certificates & Approvals

  • AWWA C511-92
  • ASSE 1013
  • CSA B64.5
  • UL Classified
  • FM Approved (OSY only)
  • Approved by Foundation for Cross Connection Control & Hydraulic Research at USC (for 2 1/2" to 6" sizes)

FAQs

What is the primary function of the Watts Series 994 backflow preventer?

It is designed to protect potable water supplies from contamination due to backsiphonage or backpressure from hazardous cross-connections.

Does this backflow preventer include a flood sensor?

Yes, it is equipped with a SentryPlus Alert® flood sensor to detect excessive water discharge from the relief valve. An add-on connection kit is required to activate its communication features.

What material is the body of the backflow preventer made from?

The main valve body and all internal metal parts are constructed from 300 Series stainless steel, providing excellent corrosion resistance and strength.

What are the maximum operating pressure and temperature?

This assembly has a maximum working pressure of 175 psi (12.1 bar) and a continuous temperature range of 33°F-110°F (0.5°C - 43°C).

Are the shutoff valves included with this assembly approved by any agencies?

Yes, the outside stem and yoke (OSY) resilient seated gate valves are UL Classified and FM Approved.

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