2 1/2 M400Z-BFG
Item Number: 0191106Brand - Ames
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- Product Type: Reduced Pressure Zone Backflow Preventer
- Weight: 90.0 lb
- Size: 2 1/2 inch
- Housing Material: 304 (Schedule 40) Stainless Steel
- Valve Type: Grooved Gear Operated Butterfly with Tamper Switch
- Design: Extremely Compact, 70% Lighter
- Maximum Working Pressure: 175 psi
- Installation: Horizontal Z Pattern
- Certifications: ASSE 1013, CSA B64.4, UL/CULus, FM, NSF/ANSI 61-G
Description
Description
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Connections
- This 2 1/2 inch backflow preventer features grooved end connections for both the inlet and outlet.
- The grooved couplings allow for integral pipeline adjustment and simplify installation into existing grooved piping systems.
Installation Note
- When installing a drain line on Series M400 backflow preventers, utilize a 400 or 500 air gap.

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Additional Details
The Maxim™ 2 1/2 inch lead-free reduced pressure zone backflow preventer assembly, model M400Z-BFG, is designed to protect potable water systems from contamination by backsiphonage or backpressure, in accordance with national plumbing codes.
This assembly features grooved gear-operated butterfly shutoff valves and a horizontal Z pattern configuration, ideal for health hazard applications and continuous pressure piping.
Construction & Design
- Features an extremely compact design, making it 70% lighter than traditional designs for easier installation in smaller enclosures.
- Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for durability.
- Includes torsion spring link check modules for lowest pressure loss and unmatched ease of serviceability.
- Groove couplings allow for integral pipeline adjustment and simplified installation.
- Equipped with reversible elastomer check discs and a bottom-mounted differential pressure relief valve.
- Integral grooved gear-operated butterfly shutoff valves with tamper switches are included.
- Designed for horizontal Z pattern installation.
Lead-Free Compliance
- The wetted surface of this product contains less than 0.25% of lead by weight, ensuring compliance with lead-free requirements for consumable water applications.
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. Thoroughly read all installation instructions and product safety information before beginning the installation of this product.
Specifications
General
- Product Type: Reduced Pressure Zone Backflow Preventer Assembly
- Model: M400Z-BFG
- Nominal Size: 2 1/2 inch
- Pattern: Horizontal Z Pattern
- Valve Type: Grooved Gear Operated Butterfly Shutoff Valves with Tamper Switch
- Manufacturer: Ames Fire & Waterworks
Materials
- Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
- Elastomers: EPDM, Silicone, Buna 'N'
- Link Check Material: Noryl®, Stainless Steel
- Check Disc Material: Reversible Silicone or EPDM
- Test Cock Body: Lead Free Bronze
- Pins & Fastener Material: 300 Series Stainless Steel
- Spring Material: Stainless Steel
Performance
- Maximum Working Pressure: 175 psi (12.1 bar)
- Temperature Range: 33°F - 110°F (0.5°C – 43°C)
Dimensions & Weight
- Height (H): 23 in (584 mm)
- Length (P): 15 11/16 in (398 mm)
- Width (M): 19 3/4 in (502 mm)
- Overall Length (G): 32 1/2 in (825 mm)
- Connection Length (J): 9 1/2 in (242 mm)
- Weight: 67 lbs (30 kgs)
Certificates & Approvals
- ASSE 1013
- CSA B64.4
- UL/CULus Listed
- FM Approved
- NSF/ANSI 61-G Certified
- AWWA C511-97
- FCCCHR-USC Approved (2 1/2" - 6" N and Z pattern, 2 1/2" - 10" horizontal)