Swing Check Valve | 246AB Series | FNPT × FNPT | Lead-Free Brass
Swing Check Valve | 246AB Series | FNPT × FNPT | Lead-Free Brass
Red-White Valve’s 246AB Lead-Free Brass Swing Check Valve delivers reliable, code-compliant performance for potable-water, HVAC, and general plumbing systems. Built with a horizontal “T” pattern and FNPT × FNPT threaded ends (ASME B1.20.1 NPT), this ECO-VALVE design ensures smooth flow and dependable backflow prevention.
Constructed from ASTM B927 C27450 lead-free brass and certified to AB1953 and NSF/ANSI 61 & 372, the 246AB meets the requirements of the Safe Drinking Water Act (≤ 0.25 % lead content). Rated 200 PSI WOG @ 450 °F max, it’s engineered for long-term reliability in residential, commercial, and light-industrial use.
Key Features
- Certified Lead-Free Construction — Meets AB1953 and NSF/ANSI 61 & 372 standards for safe potable-water applications.
- FNPT Threaded Ends (ASME B1.20.1) — Provides secure, leak-free connections for horizontal piping systems.
- High Temp & Pressure Rating — Handles 200 PSI WOG and 450 °F, ideal for water, oil, or gas applications.
- Durable All-Brass Body & Seat — Includes PTFE gasket and brass seat for corrosion-resistant, long-lasting performance.
- Enhanced Sizes with Stainless Stem — Sizes 2½″–4″ feature a stainless-steel stem for added strength and longevity.
- Eco-Valve Design — Clearly marked LEAD FREE and ECO-VALVE to meet modern environmental standards.
Pressure / Temperature Rating
| Pressure Rating | Temperature Range |
|---|---|
| 200 PSI WOG | Max 450 °F |
Dimension / Weight
| Size | T | A [in] | H [in] | L [in] | B [in] | C [in] | P [in] | Wt [lb] |
|---|---|---|---|---|---|---|---|---|
| ¼″ | ¼-18 NPT | 1.96 | 1.35 | 1.19 | 0.74 | 0.45 | 0.39 | 0.34 |
| ⅜″ | ⅜-18 NPT | 1.97 | 1.35 | 1.20 | 0.74 | 0.45 | 0.39 | 0.36 |
| ½″ | ½-14 NPT | 2.22 | 1.39 | 1.26 | 0.96 | 0.61 | 0.51 | 0.38 |
| ¾″ | ¾-14 NPT | 2.47 | 1.57 | 2.50 | 1.02 | 0.63 | 0.73 | 0.56 |
| 1″ | 1-11.5 NPT | 3.03 | 1.81 | 1.77 | 1.14 | 0.75 | 0.94 | 0.88 |
| 1¼″ | 1¼-11.5 NPT | 3.31 | 2.19 | 2.11 | 1.50 | 0.77 | 1.20 | 1.38 |
| 1½″ | 1½-11.5 NPT | 3.62 | 2.42 | 2.44 | 1.61 | 0.77 | 1.42 | 1.82 |
| 2″ | 2-11.5 NPT | 4.21 | 2.81 | 2.95 | 1.48 | 0.79 | 1.77 | 2.50 |
| 2½″ | 2½-8 NPT | 5.63 | 3.48 | 3.74 | 1.81 | 1.06 | 2.24 | 4.90 |
| 3″ | 3-8 NPT | 6.18 | 3.91 | 4.41 | 2.05 | 1.14 | 2.56 | 7.44 |
| 4″ | 4-8 NPT | 7.44 | 4.51 | 5.51 | 2.40 | 1.20 | 3.58 | 11.12 |
Material Construction
| # | Part | Material | Specification |
|---|---|---|---|
| 1 | Body | Lead-Free Brass | ASTM B927 C27450 |
| 2 | Retaining Disc | Lead-Free Brass | ASTM B927 C27450 |
| 3 | Stem (2½″–4″ = Stainless Steel) | Lead-Free Brass / Stainless Steel | ASTM B927 C27450 |
| 4 | Bolt | Lead-Free Brass | ASTM B927 C27450 |
| 5 | Gasket | PTFE | PTFE |
| 6 | Cap | Lead-Free Brass | ASTM B927 C27450 |
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.