3 M200N-NRS
Item Number: 0191019Brand - Ames
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- Nominal Size: 3 inch
- Weight: 194.0 lb
- Body Material: 304 Stainless Steel
- Shutoff Valves: Non-Rising Stem (NRS)
- Check Modules: Patented Tri-Link Checks
- Maximum Working Pressure: 175 PSI
- Temperature Range: 33°F - 110°F
- Lead Free: Less than 0.25% lead content
- Easy maintenance without special tools
Description
Description
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This Maxim M200N backflow preventer assembly features groove end connections for easy installation and integral pipeline adjustment. It is approved for N Pattern installation, but can also be installed horizontally or vertically to suit various system layouts.

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Additional Details
The Maxim M200N 3 inch Lead Free Double Check Valve Backflow Preventer Assembly is designed to prevent the reverse flow of non-potable water and fire protection substances from entering the potable water supply system due to backsiphonage or backpressure.
This assembly is ideal for protection at cross-connections identified as non-health hazards, such as on high-flow fire systems and other contaminants found at the service line entrance. Its compact modular design with a single access sleeve ensures easy maintenance.
Features
- Extremely Compact Design, approximately 70% lighter than traditional designs
- Constructed with a 304 (Schedule 40) Stainless Steel Housing & Sleeve for durability
- Features Patented Tri-Link Checks that provide the lowest pressure loss
- Groove Fittings allow for integral pipeline adjustment
- Unmatched Ease of Serviceability, allowing check modules to be removable and serviceable without the use of special tools
- Includes two independent Tri-Link Check modules, two drip tight shutoff valves, and four ball valve type test cocks
- Non-rising stem (NRS) resilient seated gate valves are included
- Designed for N Pattern installations, also available for horizontal or vertical
- Wetted surfaces of this product contain less than 0.25% of lead by weight
Specifications
- Product Type: Double Check Valve Backflow Preventer Assembly
- Brand: Maxim (Ames Fire & Waterworks)
- Model: M200N
- Nominal Size: 3 inch
- Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
- Check Modules: Two independent Patented Tri-Link Checks
- Shutoff Valves: Non-Rising Stem (NRS) Resilient Seated Gate Valves
- Test Cocks: Four, Lead Free Bronze Body, Ball Valve Type
- Check Disc Material: Reversible Silicone or EPDM
- Elastomers: EPDM, Silicone, and Buna 'N'
- Pins & Fasteners Material: 300 Series Stainless Steel
- Springs Material: Stainless Steel
- Maximum Working Pressure: 175 PSI (12.06 bar)
- Temperature Range: 33°F - 110°F (0.5°C – 43°C)
- Installation Pattern: N Pattern (also Horizontal, Vertical)
- Lead Content: Wetted surface contains less than 0.25% lead by weight
Certificates & Approvals
- Approved by Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
- AWWA C510-97
- ASSE 1015
- CSA B64.5
- NSF/ANSI 61-G