Weight: Approximately 70% lighter than traditional designs
Description
The Maxim™ 8 inch lead free reduced pressure zone backflow preventer assembly prevents reverse flow of fire protection substances and non-potable water into potable water supplies. Designed for horizontal Z pattern installation, it features a 304 (Schedule 40) stainless steel body, non-rising stem (NRS) gate valves, and torsion spring link check modules. Its compact design and groove couplings simplify installation, while being approximately 70% lighter than traditional designs. This assembly ensures protection against backsiphonage and backpressure in continuous pressure piping and health hazard cross-connection applications.
Help Me Connect
Installation Orientation
This backflow preventer assembly is approved for horizontal Z pattern installation.
Ensure the assembly is installed precisely in accordance with the direction of the flow arrow.
Connections
The assembly utilizes groove couplings for straightforward installation and proper pipe alignment.
Site Requirements
Adequate clearance must be provided around the valve for future inspection, testing, and servicing.
A minimum of 12 inches of clearance is required between the lower portion of the assembly and the floor or grade.
The unit must be protected from freezing to ensure proper operation and longevity.
This Maxim™ 8 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply. It safeguards against backsiphonage and backpressure in accordance with national plumbing codes and water authority requirements.
Ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards, this assembly is suitable for use at the service line entrance.
Features
304 (Schedule 40) stainless steel housing and sleeve
Replaceable check disc rubber
Extremely compact design for smaller enclosures
Torsion spring check modules for ease of serviceability and lowest pressure loss
Groove couplings for easy installation and pipe alignment
Approximately 70% lighter than traditional designs
Drip tight shutoff valves (NRS)
Bottom mounted stainless steel relief valve
Components
Stainless steel body with a quick access sleeve
Torsion spring check modules
Resilient seated gate valves with non-rising stem (NRS)
Test cocks
Bottom mounted pressure relief valve
Installation Notes
Approved for horizontal Z pattern installation
Installation must be in accordance with the direction of the flow arrow
Requires adequate clearance for inspection, testing, and servicing
A 12 inch minimum clearance is required between the lower portion of the assembly and the floor or grade
The valve should be protected from freezing
Specifications
General
Product Type: Reduced Pressure Zone Backflow Preventer Assembly
Series: Maxim™ M400Z-NRS
Nominal Pipe Size: 8 inch
Body Material: 304 (Schedule 40) Stainless Steel
Valve Type: Resilient Seated Gate Valves with Non-Rising Stem (NRS)
Check Modules: Torsion Spring, Link Check
Relief Valve: Bottom Mounted Stainless Steel
Connections: Groove Couplings
Lead Free: Yes
Installation Pattern: Z-Pattern, Horizontal
Dimensions (8 inch)
Dimension A: 11 1/2 inches (292 mm)
Dimension B: 5 3/4 inches (146 mm)
Dimension C: 14 inches (356 mm)
Dimension D: 22 1/2 inches (572 mm)
Dimension E: 5 3/4 inches (146 mm)
Dimension F: 8 1/4 inches (210 mm)
FAQs
What is the primary purpose of this backflow preventer assembly?
Its primary purpose is to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply, protecting against backsiphonage and backpressure.
What type of installation is this assembly approved for?
This Maxim™ 8 inch assembly is approved for horizontal Z pattern installation. It must always be installed according to the direction of the flow arrow.
What materials are used in the construction of this backflow preventer?
The housing and sleeve are constructed from 304 (Schedule 40) stainless steel, and it includes a bottom mounted stainless steel relief valve.
How does this backflow preventer connect to piping?
The assembly uses groove couplings, which are designed for easy installation and precise pipe alignment.
Are the shutoff valves drip tight?
Yes, this assembly features drip tight shutoff valves with non-rising stems (NRS) to ensure reliable closure.
