3 M400N-NRS

Item Number: 0191097
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$9,332.26
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Size: 3 Inch
  • Weight: 197.0 lb
  • Housing Material: 304 Stainless Steel (Schedule 40)
  • Valve Type: Reduced Pressure Zone Backflow Preventer
  • Shutoff Valves: NRS (Non-Rising Stem)
  • Installation Pattern: Horizontal N
  • Weight: 70% lighter than traditional designs
  • Check Modules: Link and Torsion Spring
  • Couplings: Groove

Description

This 3-inch Maxim lead-free reduced pressure zone backflow preventer assembly effectively prevents backflow of non-potable water into the potable supply. Featuring a durable 304 stainless steel housing and non-rising stem (NRS) shutoff valves, it ensures reliable protection against backsiphonage and backpressure. The unit incorporates link check modules for minimal pressure loss and is 70% lighter than traditional designs, offering a compact solution. Designed for horizontal N pattern installation, it is ideal for continuous pressure piping applications and health hazard cross-connections. Item number 0191097.

Help Me Connect

This backflow preventer assembly utilizes groove couplings for straightforward installation and accurate pipe alignment. It is specifically approved for horizontal N pattern installation. Ensure the assembly is installed in accordance with the direction of the flow arrow for proper operation.

For optimal performance and maintenance, adequate clearance of at least 12 inches minimum should be provided around the valve for inspection, testing, and servicing, especially between the lower portion of the assembly and the floor or grade. The valve should be protected from freezing. Normal discharge can be managed with an Ames air gap fitting and a fabricated indirect waste line, requiring floor drains of the same size in case of excessive discharge.

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Additional Details

This Maxim™ 3 inch lead-free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure in accordance with national plumbing codes and water authority requirements. This extremely compact assembly is approved for horizontal N pattern installation.

Features

  • Features a 304 (Schedule 40) stainless steel housing and sleeve for durability.
  • Equipped with resilient seated gate valves with non-rising stem (NRS) for reliable shutoff.
  • Replaceable check disc rubber and torsion spring check modules for ease of serviceability.
  • Link check modules provide the lowest pressure loss.
  • Groove couplings for easy installation and pipe alignment.
  • Approximately 70% lighter than traditional designs, making it ideal for compact installations.
  • Includes a bottom mounted stainless steel relief valve and test cocks.
  • Ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards.

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

  • Size: 3 Inch
  • Assembly Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Body Material: 304 (Schedule 40) Stainless Steel Housing and Sleeve
  • Shutoff Valves: NRS (Non-Rising Stem)
  • Check Modules: Link Check Modules, Torsion Spring Check Modules
  • Check Disc: Replaceable Check Disc Rubber
  • Couplings: Groove Couplings
  • Relief Valve: Bottom Mounted Stainless Steel
  • Installation Pattern: Horizontal N Pattern

Certificates & Approvals

  • None specified in source material.

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 due to backsiphonage or backpressure, complying with national plumbing codes.

What material is used for the housing and sleeve?

The housing and sleeve are constructed from durable 304 (Schedule 40) stainless steel, offering excellent corrosion resistance and longevity.

What type of shutoff valves are included with this assembly?

This assembly features resilient seated gate valves with non-rising stems (NRS), which provide reliable and drip-tight shutoff capabilities.

Can this backflow preventer be installed in any orientation?

No, this Maxim assembly is specifically approved and designed for horizontal N pattern installation, and it must be installed in accordance with the direction of the flow arrow.

How does this assembly compare in weight to traditional designs?

This backflow preventer assembly is approximately 70% lighter than traditional designs, contributing to easier handling, installation, and allowing for use in smaller enclosures.

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