6 994-DOSY

Item Number: 0439415
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$18,939.48
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Body Material: 300 Series Stainless Steel
  • Max Working Pressure: 175 psi
  • Temperature Range: 33°F-110°F
  • Shutoff Valves: Domestic OSY resilient seated gate valves
  • Check Valve Type: Torsion spring, thermoplastic
  • Lead Free: Wetted surfaces contain <0.25% lead
  • Flood Sensor: Integrated for discharge detection

Description

This 6 inch Watts Series 994 Reduced Pressure Zone (RPZ) backflow preventer with domestic OSY shutoffs is designed to safeguard potable water supplies from contamination caused by backsiphonage and backpressure in health hazard cross-connections. Key features include a durable stainless steel body, short lay length for easy installation, and torsion spring check valves for optimal flow. The assembly also integrates a flood sensor to detect relief valve discharges and has wetted surfaces containing less than 0.25% lead by weight. It is approved by ASSE 1013, AWWA C511-92, and FM.

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Installation Notes

This 6 inch Reduced Pressure Zone Assembly is designed for installation in continuous pressure piping applications to protect potable water supplies from health hazard cross-connections. The assembly features flanged inlet and outlet domestic OSY shutoff valves for connection to the piping system. The central body connects to these shutoff valves via grooved couplings. It includes four ball-type test cocks for verification of proper operation. Flange dimensions are in accordance with AWWA Class D standards.

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Additional Details

The Watts Series 994 Reduced Pressure Zone Assembly is a 6 inch backflow preventer designed to protect potable water supplies from backsiphonage and backpressure of hazardous materials. It is suitable for health hazard cross-connections and continuous pressure piping applications, preventing the reverse flow of fire protection substances and water of non-potable quality into the potable water supply.

Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs.

Key Features

  • Stainless steel body provides long term corrosion resistance and maximum strength.
  • Domestic outside stem and yoke (OSY) resilient seated gate valves for reliable shutoff control.
  • Short lay length and compact construction allow for smaller enclosures and easy retrofit.
  • Bottom mounted relief valve reduces clearance requirements when installed against an outside wall.
  • Torsion spring check valves provide maximum flow at low pressure drop and ensure trouble-free operation with thermoplastic and stainless steel hinge pins.
  • Equipped with a flood sensor on the relief valve to detect excessive water discharges.
  • No special tools are required for servicing.
  • The wetted surface of this product contains less than 0.25% lead by weight.

An add-on connection kit is required to activate the flood sensor's alert feature. Without this kit, the flood sensor acts as a passive component and does not communicate with any other device.

Specifications

  • Size: 6 inch
  • Main Valve Body Material: 300 Series Stainless Steel
  • Internal Metal Parts Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®
  • Check Valve Type: Torsion Spring, Thermoplastic with Stainless Steel Hinge Pins
  • Relief Valve: Stainless Steel, Bottom Mounted, Balanced Rolling Diaphragm
  • Shutoff Valves: Domestic Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
  • Test Cocks: Four Ball-Type
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F-110°F (0.5°C - 43°C) continuous
  • Lead Content: Wetted surfaces contain less than 0.25% lead by weight

Certificates & Approvals

  • AWWA C511-92
  • CSA B64.5
  • UL Classified
  • ASSE 1013
  • FM Approved (OSY only)
  • Approved by the Foundation for Cross Connection Control & Hydraulic Research at the University of Southern California (sizes 2½" to 6")

FAQs

What is the primary function of this backflow preventer?

This 6 inch Reduced Pressure Zone Assembly is designed to protect potable water supplies by preventing the reverse flow of hazardous materials due to backsiphonage or backpressure in health hazard cross-connections.

What material is the body of the Series 994 assembly made from?

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

Does this backflow preventer include shutoff valves?

Yes, it includes domestic outside stem and yoke (OSY) resilient seated gate valves for reliable shutoff control, along with four ball-type test cocks.

Is special tooling required for maintenance or servicing?

No, the Watts Series 994 is designed for easy maintenance, requiring no special tools for servicing. Its compact, modular design allows for in-line repairs through a single access cover.

What is the maximum operating pressure and temperature range for this unit?

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

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