Inline Check Valve | 232AB Series | FNPT × FNPT | Lead-Free Brass
Inline Check Valve | 232AB Series | FNPT × FNPT | Lead-Free Brass
Red-White Valve’s 232AB Lead-Free Brass In-Line Check Valve provides durable, code-compliant backflow protection for potable water systems. Designed with a spring-loaded mechanism for automatic flow control, this ECO-VALVE model combines high performance with compact construction, supporting both horizontal and vertical installation.
Made from ASTM B927 C27450 lead-free brass and certified to AB1953 and NSF/ANSI/CAN 61 & 372, the 232AB ensures long-term safety, corrosion resistance, and reliability. Its FNPT × FNPT threaded ends conform to ASME B1.20.1-NPT standards for secure integration into any piping system.
Key Features
- Certified Lead-Free Brass Construction — Meets AB1953 and NSF/ANSI 61 & 372 standards for safe potable water use.
- Spring-Loaded Design — Ensures reliable unidirectional flow and prevents backflow under varying pressures.
- High Working Pressure — Rated to 400 PSI (½″–2″) and 200 PSI (2½″–3″) from 15 °F to 200 °F.
- Threaded FNPT × FNPT Ends — Precision ASME B1.20.1-NPT threads for tight, leak-free connections.
- Corrosion-Resistant Components — Stainless steel spring and EPDM Peroxide gasket for extended service life.
- Eco-Valve Certified — Environmentally responsible, low-lead materials compliant with the Safe Drinking Water Act.
Pressure / Temperature Rating
| Size Range | Pressure / Temperature |
|---|---|
| ½″ – 2″ | 400 PSI from 15 °F to 200 °F |
| 2½″ – 3″ | 200 PSI from 15 °F to 200 °F |
Dimension, Cv, Weight
| Size | T | A [in] | W [in] | Wrench [in] | Cv [USG/min] | Wt. [lb] | Nominal Pressure [PSI] | Min. Working ΔP [PSI] |
|---|---|---|---|---|---|---|---|---|
| ½″ | ½ – 14 NPT | 2.00 | 1.13 | 0.97 | 3.90 | 0.25 | 400 | 0.5 |
| ¾″ | ¾ – 14 NPT | 2.15 | 1.43 | 1.20 | 7.47 | 0.38 | 400 | 0.5 |
| 1″ | 1 – 11.5 NPT | 2.48 | 1.76 | 1.46 | 12.4 | 0.59 | 400 | 0.5 |
| 1¼″ | 1¼ – 11.5 NPT | 2.70 | 2.24 | 1.85 | 26.3 | 0.96 | 400 | 0.5 |
| 1½″ | 1½ – 11.5 NPT | 2.89 | 2.57 | 2.09 | 36.8 | 1.27 | 400 | 0.5 |
| 2″ | 2 – 11.5 NPT | 3.19 | 3.22 | 2.60 | 52.3 | 1.98 | 400 | 0.5 |
| 2½″ | 2½ – 8 NPT | 4.52 | 4.23 | 3.33 | 82.4 | 4.83 | 200 | 0.5 |
| 3″ | 3 – 8 NPT | 5.09 | 4.95 | 3.86 | 108 | 6.64 | 200 | 0.5 |
Material Construction
| # | Part | Material | Specification |
|---|---|---|---|
| 1 | Body | Lead-Free Brass | ASTM B927 C27450 |
| 2 | End Piece | Lead-Free Brass | ASTM B927 C27450 |
| 3 | Stem | Lead-Free Brass | ASTM B927 C27450 |
| 4 | Shutter Disk | Lead-Free Brass | ASTM B927 C27450 |
| 5 | Gasket | EPDM Perox | NSF Approved |
| 6 | Retaining Disk | Lead-Free Brass | ASTM B927 C27450 |
| 7 | Spring | Stainless Steel | ISO 6931-1 4310-301-00-I-NS |
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.