Lead-Free Brass In-Line Check Valve | 233AB Series | Solder × Solder
Lead-Free Brass In-Line Check Valve | 233AB Series | Solder × Solder
Red-White Valve’s 233AB Lead-Free Brass In-Line Check Valve is engineered for reliability, performance, and compliance in potable water systems. This ECO-VALVE model features a spring-loaded mechanism that ensures dependable backflow prevention in both horizontal and vertical installations. Constructed from ASTM B927 C27450 lead-free brass, it meets AB1953 and NSF/ANSI 61 & 372 standards for safe use in drinking water applications.
Compact and easy to install, the Solder × Solder ends conform to ASME B16.22, ensuring tight, leak-free joints with 95-5 tin-antimony solder. Ideal for residential, commercial, and retrofit applications, this valve provides up to 400 PSI working pressure for sizes through 2″ and 200 PSI for 3″ sizes.
Key Features
- Certified Lead-Free Brass Body — Made from ASTM B927 C27450 alloy; fully compliant with AB1953, NSF/ANSI 61 & 372.
- Spring-Loaded Design — Provides positive sealing for both horizontal and vertical installations.
- Durable Solder × Solder Ends — ASME B16.22 compliant and compatible with 95-5 tin-antimony solder (ASTM B32 Grade 95TA).
- High Pressure Rated — 400 PSI from 15 °F to 200 °F (sizes ½″–2″); 200 PSI for 3″ valves.
- Corrosion-Resistant Materials — Lead-free brass body and stainless-steel spring ensure long-term durability.
- Eco-Valve Certified — Environmentally responsible, low-lead construction for modern plumbing systems.
Pressure / Temperature Rating
| Size Range | Pressure Rating |
|---|---|
| ½″–2″ | 400 PSI from 15 °F to 200 °F |
| 3″ | 200 PSI from 15 °F to 200 °F |
Dimension, Cv, Weight
| Size | D [in] | A [in] | W [in] | C [in] | Cv [USG/min] | Wt. [lb] | Nominal Pressure [PSI] | Min. Working ΔP [PSI] |
|---|---|---|---|---|---|---|---|---|
| ½″ | 0.627–0.631 | 2.16 | 1.13 | 0.51 | 2.65 | 0.22 | 400 | 0.5 |
| ¾″ | 0.877–0.881 | 2.75 | 1.43 | 0.75 | 5.44 | 0.37 | 400 | 0.5 |
| 1″ | 1.128–1.132 | 3.39 | 1.76 | 0.91 | 11.5 | 0.62 | 400 | 0.5 |
| 1¼″ | 1.378–1.382 | 3.69 | 2.22 | 0.98 | 20.2 | 0.95 | 400 | 0.5 |
| 1½″ | 1.628–1.633 | 4.07 | 2.56 | 1.10 | 30.0 | 1.35 | 400 | 0.5 |
| 2″ | 2.128–2.133 | 4.84 | 3.22 | 1.34 | 48.5 | 2.14 | 400 | 0.5 |
| 2½″ | 2.628–2.632 | 5.97 | 4.15 | 1.50 | 78.2 | 4.27 | 200 | 0.5 |
| 3″ | 3.128–3.132 | 6.82 | 4.90 | 1.69 | 103 | 6.40 | 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 Peroxide | 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.