3 M400-NRS

Item Number: 0191091
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$8,120.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Nominal Size: 3 inch
  • Weight: 200.0 lb
  • Housing Material: 304 (Schedule 40) stainless steel
  • 70% lighter than traditional designs
  • Extremely compact design
  • Replaceable check disc rubber
  • Groove couplings for easy installation
  • Drip tight NRS shutoff valves
  • Bottom mounted stainless steel relief valve

Description

This 3-inch Maxim lead-free reduced pressure zone backflow preventer assembly with NRS shutoff valves prevents the reverse flow of non-potable water and fire protection substances into the potable water supply. Key features include a 304 stainless steel housing, replaceable check disc rubber, and a compact, lightweight design that is 70% lighter than traditional models. Groove couplings ensure easy installation. It is suitable for continuous pressure piping and health hazard cross-connections, designed for horizontal installation. Item number 0191091.

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Installation Considerations

  • This backflow preventer is approved for horizontal installation, provided the assembly is installed in accordance with the direction of the flow arrow.
  • It features groove couplings designed for easy installation and pipe alignment.
  • Ensure adequate clearance around the valve for inspection, testing, and servicing, with a minimum 12-inch clearance required between the lower portion of the assembly and the floor or grade.
  • The valve should be protected from freezing.
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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.

It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from other contaminants found at the service line entrance. This assembly features an extremely compact design and is significantly lighter than traditional designs, approved for horizontal installation when installed in accordance with the direction of the flow arrow.

Construction & Features

  • 304 (Schedule 40) stainless steel housing and sleeve for durability
  • Replaceable check disc rubber for easy maintenance
  • Torsion spring check modules for ease of serviceability and lowest pressure loss (Link check modules)
  • Groove couplings for easy installation and pipe alignment
  • Resilient seated gate valves with non-rising stem (NRS) for reliable, drip tight shutoff
  • Bottom mounted stainless steel relief valve
  • Equipped with test cocks

NOTICE: 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

  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Model Series: Maxim™
  • Nominal Size: 3 inch
  • Housing Material: 304 (Schedule 40) stainless steel
  • Sleeve Material: 304 (Schedule 40) stainless steel
  • Shutoff Valves: Resilient Seated Gate Valves, Non-Rising Stem (NRS)
  • Check Modules: Torsion Spring, Link Check
  • Check Disc Material: Rubber (Replaceable)
  • Relief Valve: Bottom Mounted Stainless Steel
  • Coupling Type: Groove
  • Design Feature: 70% Lighter than traditional designs
  • Installation Orientation: Horizontal (approved)
  • Lead Free: Yes

FAQs

What is the primary purpose of this backflow preventer?

This backflow preventer is designed to prevent the reverse flow of non-potable water and fire protection substances into the potable water supply, protecting against backsiphonage and backpressure in accordance with national plumbing codes.

What are the main components of this assembly?

The assembly consists of a 304 stainless steel body with a quick access sleeve, torsion spring check modules, resilient seated gate valves with non-rising stems, test cocks, and a bottom mounted stainless steel pressure relief valve.

Is this backflow preventer designed for specific installation orientations?

Yes, it is approved for horizontal installation. The backflow assembly must be installed in accordance with the direction of the flow arrow to ensure proper operation.

What material is the housing made from?

The housing and sleeve of this backflow preventer are constructed from durable 304 (Schedule 40) stainless steel, ensuring longevity and resistance to corrosion.

How does this backflow preventer compare in size and weight to traditional designs?

It features an extremely compact design and is approximately 70% lighter than traditional backflow preventer assemblies, which allows for the use of smaller enclosures.

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