4 M400-NRS

Item Number: 0191092
1 1
$10,778.99
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Size: 4 Inch
  • Weight: 232.0 lb
  • Body Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: Non-Rising Stem (NRS)
  • Check Modules: Torsion Spring, Link Type
  • Design: Extremely Compact
  • Weight: 70% lighter than traditional designs
  • Connections: Groove Couplings
  • Relief Valve: Bottom Mounted Stainless Steel

Description

This 4 inch Maxim stainless steel reduced pressure zone (RPZ) backflow preventer assembly is designed to safeguard potable water supplies from contamination caused by backsiphonage or backpressure from fire protection systems and non-potable sources. Featuring durable 304 (Schedule 40) stainless steel construction, non-rising stem (NRS) shutoff valves, and torsion spring link check modules for lowest pressure loss. Its compact and 70% lighter design makes installation easier, with grooved couplings for alignment. Approved for horizontal installation, it is suitable for continuous pressure piping and health hazard cross-connections. Item number 0191092.

Help Me Connect

Connections & Installation

  • This 4 inch backflow preventer is designed with groove couplings for straightforward installation and efficient pipe alignment.
  • The assembly is approved for horizontal installation, which should always be done following the direction of the flow arrow.
  • Ensure proper clearance for inspection, testing, and servicing, with a minimum 12-inch clearance below the assembly.
View full details

Additional Details

This Maxim™ 4 inch lead-free reduced pressure zone backflow preventer assembly is engineered to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply. It protects against both backsiphonage and backpressure in accordance with national plumbing codes and water authority requirements.

Design & Construction

  • Features a durable stainless steel body with a quick access sleeve for ease of maintenance.
  • Equipped with torsion spring check modules for reliable performance and easy serviceability.
  • Incorporates resilient seated gate valves with a non-rising stem (NRS) for dependable shutoff.
  • Includes test cocks and a bottom mounted pressure relief valve, also made from stainless steel.
  • Designed to be 70% lighter than traditional backflow preventers, facilitating easier handling and installation.
  • The extremely compact design allows for use in smaller enclosures.

Performance & Use

  • Link check modules are engineered to provide the lowest pressure loss for efficient system operation.
  • Shutoff valves offer drip tight performance.
  • Approved for horizontal installation, provided it is installed according to the direction of flow arrow.
  • Ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards or other contaminants at the service line entrance.

Specifications

  • Size: 4 inch
  • Assembly Type: Reduced Pressure Zone Backflow Preventer
  • Brand: Maxim™
  • Body Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: Non-Rising Stem (NRS) Gate Valves
  • Check Modules: Torsion Spring, Link Check Modules
  • Relief Valve: Bottom Mounted, Stainless Steel
  • Housing: Stainless Steel with Quick Access Sleeve
  • Couplings: Groove

FAQs

What is the primary function 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 contamination due to backsiphonage or backpressure.

What material is the body of this assembly made from?

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

What type of shutoff valves does this backflow preventer include?

This assembly comes equipped with resilient seated gate valves that feature a non-rising stem (NRS) design for reliable shutoff.

Can this backflow preventer be installed horizontally?

Yes, this assembly is approved for horizontal installation, provided that it is installed in strict accordance with the direction of the flow arrow and all relevant instructions.

How does the weight of this backflow preventer compare to traditional designs?

This Maxim backflow preventer is designed to be extremely compact and is approximately 70% lighter than traditional backflow preventer assemblies, which simplifies handling and installation.

Related Products

1 4