Crafted with precision using lead-free brass (ASTM B927 C27450) and built to meet the rigorous standards of NSF/ANSI 61 & 372, the 247AB is your go-to solution for backflow prevention in residential, commercial, or industrial piping systems. Its horizontal \\”T\\” pattern design and solder x solder ends (ASME B16.22) ensure straightforward installation and secure long-term operation.
Whether you’re working on new construction or retrofitting existing lines, the 247AB offers a durable, corrosion-resistant check valve solution that prioritizes both safety and performance.
Key Features:
- Lead-Free Certified – Complies with AB1953, NSF/ANSI 61 & 372 for safe use in drinking water applications.
- Heavy-Duty Construction – All key components, including body, disc, stem, cap, and bolt, made from lead-free brass for long-lasting durability.
- High Performance – Rated at 200# WOG with a maximum temperature of 450°F, suitable for demanding systems.
- Tried-and-True Design – Features a horizontal \\”T\\” pattern swing check valve configuration for efficient backflow prevention.
- Easy to Install – Solder x solder end connections ensure leak-tight joins that meet ASME B16.22 standards.
- Smooth Flow Operation – Integrated PTFE gasket provides a reliable, chemical-resistant seal.
- Versatile Sizing – Available from ½\\” up to 4\\” with detailed dimensions and weights for proper planning and fitment.
Applications:
- Potable Water Systems
- Heating and Cooling Circuits
- Backflow Prevention in Residential or Commercial Plumbing
- Water Distribution Networks
- Lead-Free Compliance Installations (per the U.S. Drinking Water Act)
Compliance & Safety Information:
- Certified to NSF/ANSI 61 & 372 for drinking water system components.
- AB1953 compliant for low-lead applications.
- California Proposition 65 Warning: This product contains chemicals known to cause cancer or reproductive harm. See www.P65Warnings.ca.gov for more information.
With decades of valve engineering experience, Red-White Valve Corp. brings innovation, compliance, and quality together in the 247AB swing check valve. This product is trusted by contractors, engineers, and builders across North America who need a proven solution that meets today’s strict environmental and safety standards.
Dimension, Weight
| Size | S [in] | A [in] | H [in] | L [in] | B [in] | C [in] | P [in] | Wt. [lb] |
|---|---|---|---|---|---|---|---|---|
| 1/2\\” | 0.627-0.631 | 2.32 | 1.39 | 1.26 | 0.96 | 0.51 | 0.51 | 0.34 |
| 3/4\\” | 0.877-0.881 | 2.93 | 1.57 | 2.50 | 1.02 | 0.75 | 0.73 | 0.58 |
| 1″ | 1.128-1.131 | 3.66 | 1.81 | 1.77 | 1.14 | 0.91 | 0.94 | 0.78 |
| 1¼″ | 1.378-1.381 | 3.88 | 2.19 | 2.11 | 1.50 | 0.98 | 1.20 | 1.22 |
| 1½″ | 1.628-1.632 | 4.45 | 2.42 | 2.44 | 1.61 | 1.09 | 1.42 | 1.82 |
| 2″ | 2.128-2.132 | 5.32 | 2.81 | 2.95 | 1.48 | 1.34 | 1.77 | 2.62 |
| 2½″ | 2.628-2.632 | 6.50 | 3.48 | 3.74 | 1.81 | 1.50 | 2.24 | 4.72 |
| 3″ | 3.128-3.132 | 7.28 | 3.91 | 4.41 | 2.05 | 1.69 | 2.56 | 7.00 |
| 4″ | 4.128-4.133 | 9.37 | 4.51 | 5.51 | 2.40 | 2.17 | 3.58 | 11.72 |
| Pressure/ Temperature Rating | |
|---|---|
| 200# WOG | Temp. max. 450 °F |
Material
| Part | Material | Specification | |
|---|---|---|---|
| 1 | Body | Lead Free Brass | ASTM B927 C27450 |
| 2 | Retaining disc | Lead Free Brass | ASTM B927 C27450 |
| 3 | Stem | Lead Free Brass * | ASTM B927 C27450 |
| 4 | Bolt | Lead Free Brass | ASTM B927 C27450 |
| 5 | Gasket | PTFE | PTFE |
| 6 | Cap | Lead Free Brass | ASTM B927 C27450 |
* Stainless steel stem for size 2½″ -4″
