8 M500N-OSY-GPM
Item Number: 0191132Brand - Ames
Couldn't load pickup availability
- Nominal Pipe Size: 8 inch
- Weight: 807.0 lb
- Body Material: 304 (Schedule 40) Stainless Steel
- Maximum Working Pressure: 175 PSI
- Temperature Range: 33°F - 110°F
- OSY Shutoff Valves
- Horizontal N Pattern Installation
- Includes Gallon Per Minute Meter
- ASSE 1047, CSA B64.4, cULus, FM, AWWA C511-97, UL Approved
Description
Description
Help Me Connect
Help Me Connect
Connections & Installation
- This 8 inch reduced pressure detector backflow preventer features groove couplings to facilitate easy installation and pipeline alignment with existing grooved piping systems.
- The assembly includes UL and FM approved Outside Stem and Yoke (OSY) resilient seated gate valves for secure shutoff.
- Approved for horizontal N pattern installations.

Collapsible content
Additional Details
The Maxim™ 8 inch Reduced Pressure Detector Backflow Preventer Assembly is designed to prevent the reverse flow of non-potable water and fire protection substances into the potable water supply. This assembly protects against backsiphonage and backpressure in accordance with national plumbing codes and water authority requirements, making it ideal for health-hazard cross-connections like fire sprinkler systems and service line entrances.
This compact, modular backflow preventer features a 304 stainless steel body and sleeve, OSY shutoff valves, and a gallon per minute meter for leak detection.
Features
- 8 inch nominal pipe size
- Extremely compact design, approximately 70% lighter than traditional designs
- Housing and sleeve constructed from 304 (Schedule 40) stainless steel
- Approved for horizontal N pattern installation
- Furnished with a gallon per minute meter to detect underground leaks and unauthorized water use
- Groove fittings allow for integral pipeline adjustment and easy installation
- Patented Link Check provides lowest pressure loss
- Unmatched ease of serviceability with a single access cover
- Resilient seated OSY (Outside Stem and Yoke) gate valves, UL and FM approved
- Corrosion-resistant bottom mounted pressure relief valve
- Bronze body nickel plated test cocks
- Torsion spring check modules and replaceable check disc rubber
Warning: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing, consult state, municipal, or local water authority, building, and plumbing codes.
Specifications
General
- Nominal Pipe Size: 8 inch
- Product Type: Reduced Pressure Detector Backflow Preventer
- Series: Maxim™ M500N
- Installation Orientation: Horizontal N Pattern
- Design: Compact, Modular
Materials
- Housing & Sleeve: 304 (Schedule 40) Stainless Steel
- Elastomers: EPDM, Silicone, Buna 'N'
- Link Checks: Noryl®, Stainless Steel
- Check Discs: Reversible Silicone or EPDM
- Test Cocks: Lead Free* Bronze Body
- Pins & Fasteners: 300 Series Stainless Steel
- Springs: Stainless Steel
Performance
- Maximum Working Pressure: 175 PSI (12.06 bar)
- Temperature Range: 33°F - 110°F (5°C - 43°C)
Certificates & Approvals
- ASSE: 1047
- CSA: B64.4
- cULus: Classified
- FM: Approved
- AWWA: C511-97
- UL: Classified
Dimensions & Weight (Approximate)
- Length (A): 54 3/4 inch (1391 mm)
- Height (C OSY): 37 3/4 inch (959 mm)
- Width (D): 10 1/2 inch (267 mm)
- Overall Length (M): 59 1/8 inch (1502 mm)
- Weight: 657 lbs (298 kgs)
FAQs
What is the primary purpose of this backflow preventer?
What materials are used in the construction of this backflow preventer?
Is this assembly suitable for drinking water systems?
What is the maximum operating pressure and temperature range for this unit?
Does this backflow preventer include a meter for water usage?
Related Products
-
Item Number: 0064661
Ames 3/4 - 1" 400B-AG Air Gap Drain Fitting
Regular price $122.62Special Order -
-
Item Number: 7019628
Ames® 2 1/2" –10" 400/500 Lead Free Air Gap Drain Fitting w/ Splash Guard
Regular price $253.88On Order