3" 4000SS OS&Y Backflow Preventor Valve Stainless Steel Stem
R 82,453.00
Sale price
R 82,453.00
Regular price
R 90,701.00
Skip to product information
Request for Tax Exemption
Request a Quote
3" 4000SS OS&Y Backflow Preventor Valve Stainless Steel Stem
R 82,453.00
Sale price
R 82,453.00
Regular price
R 90,701.00
Shipping calculated at checkout
The 3" 4000SS OS&Y Backflow Preventor Valve protects commercial, industrial, and municipal water supplies from reverse flow contamination. Designed for integration into fire sprinkler systems and mainline water feeds, this assembly prevents cross-contamination while maintaining minimal pressure loss to support overall system hydraulic efficiency. The Outside Stem & Yoke (OS&Y) configuration satisfies visual inspection codes by providing an immediate, unobstructed indication of whether the valve is open or closed.
This backflow assembly fulfills life safety compliance requirements outlined in NFPA 13 for fire protection system installation, NFPA 24 for private service mains, and NFPA 25 for routine inspection and testing procedures. It meets stringent industry benchmarks, carrying UL Listing to UL 312 and FM Approval.
Key Features & Construction
- Stainless Steel Assembly Body: The reduced-pressure backflow assembly has a stainless-steel body.
- Stainless Steel Trim: Internal stems, nuts, and fasteners utilize 300-series stainless steel to resist corrosive water conditions.
- Dual Check Modules: Engineered check assemblies prevent contamination hazards while minimizing pressure drop across the valve.
- OS&Y Position Indication: Raised stem design allows field personnel to verify valve status visually without guesswork during testing procedures.
- Flexible Integration: Sized at 3 inches to interface seamlessly with standard flanged or grooved piping layouts.
Technical Specifications & Compliance Table
| Specification | Details |
|---|---|
| Manufacturer / Brand | Ames Backflows |
| Model / Series Number / SIN | 4000SS OS&Y |
| Connection / Thread Size & Type | 3" (Compatible with standard flanged or grooved connections) |
| Pressure Rating (WWP / Max Working Pressure) | N/A |
| K-Factor | N/A |
| Temperature Rating / Response Type | N/A |
| Material / Body Construction | Stainless Steel (Assembly Body); 300-Series Stainless Steel (Stems, Nuts, Fasteners) |
| Agency Listings & Approvals | UL Listed to UL 312, FM Approved |
| Applicable NFPA Standards | NFPA 13, NFPA 24, NFPA 25 |
Verify all local Authority Having Jurisdiction (AHJ) mandates and pipe sizing requirements prior to beginning installation. Consult the manufacturer's engineering guidelines for proper torque specifications and clearance details.
Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)
If you qualify for sales tax exemption, please submit your exemption details and supporting documents. Our team will review your request, and once approved, your account will be updated to receive tax-exempt checkout on eligible purchases.
If you can't find the product you're looking for, send a quote request below.
Return policy
You have 30 days to return the product. Returned items must be in the original packaging, contain all components, and be in new condition. Returns may require additional information or a photo of the item(s) to process the return. Returns received without the proper return label may take more than 10 business days to credit.
Original shipping fees are non-refundable.
You must provide a receipt or proof of purchase.
A 25% restocking fee will be applied to all returned items.
Customer is responsible for return shipping costs.
Special orders are non-cancelable and non-refundable.
Shop.water-services.us reserves the right to refuse or limit any returns that, in Shop.water-services.us’s sole judgment, appear to be fraudulent, abusive, in violation of these terms, or otherwise inappropriate.
For additional Return Policy Information, click here