Threaded Water Heater Isolation Valve Kit | 3320AB Series | FNPT × FNPT | Full Port | Lead-Free Brass
Threaded Water Heater Isolation Valve Kit | 3320AB Series | FNPT × FNPT | Full Port | Lead-Free Brass
RWV 3320AB Lead-Free Brass Isolation Valve Kit provides reliable, code-compliant isolation for tankless and traditional water heater systems. Designed for long-term performance, this valve kit combines lead-free construction with high-pressure durability, easy operation, and color-coded handles for clear identification in both residential and commercial installations.
Built from ASTM B927 C27450 lead-free brass and certified to AB1953 and NSF/ANSI/CAN 61 & 372 standards, the 3320AB delivers safe performance for potable water applications. Its ¼-turn full-port design ensures maximum flow and minimal pressure loss, while the blow-out-proof stem and adjustable PTFE packing add enhanced safety and reliability.
Key Features & Benefits
- Certified Lead-Free Construction — Made from ASTM B927 C27450 brass and fully compliant with AB1953, NSF/ANSI/CAN 61 & 372 standards for potable water systems.
- 600 PSI WOG (Non-Shock) Rating — Engineered for high-pressure plumbing and water heater isolation applications.
- Full-Port Flow Path — Provides unrestricted water flow for greater efficiency and lower system pressure loss.
- ¼-Turn Operation — Enables fast and easy shut-off and flow control with minimal torque.
- Threaded FNPT × FNPT Connections — Complies with ASME B1.20.1 for a secure, leak-free fit in threaded systems.
- Blow-Out-Proof Stem — Ensures safety and durability under variable system pressures.
- Temperature-Coded Handles — 3321AB (Red Handle) for Hot Water and 3322AB (Blue Handle) for Cold Water lines.
Dimension & Weight
| Size | Φ [in] | A [in] | H [in] | P [in] | Weight [lb] |
|---|---|---|---|---|---|
| ¾" | ¾ - 14 NPT | 3.54 | 1.66 | 0.73 | 0.92 |
Material Construction
| # | Part | Material | Specification |
|---|---|---|---|
| 1 | Body | Lead-Free Brass | ASTM B927 C27450 |
| 2 | Fixed End | Lead-Free Brass | ASTM B927 C27450 |
| 3 | Ball | Lead-Free Brass, Chrome-Plated | ASTM B927 C27450 |
| 4 | Seat | PTFE | PTFE |
| 5 | Stem | Lead-Free Brass | ASTM B927 C27450 |
| 6 | Packing Ring | PTFE | PTFE |
| 7 | Packing Nut | Brass | ASTM B283 C37700 |
| 8 | T-Handle* | Aluminum | ASTM B85 |
| 9 | Handle Nut | Steel, Zinc-Plated | ASTM A36 |
| 10 | Union Nut | Brass | ASTM B283 C37700 |
| 11 | Union | Lead-Free Brass | ASTM B927 C27450 |
| 12 | O-Ring | EPDM Peroxide | NSF Approved |
*3321AB: Red Handle, 3322AB: Blue Handle
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.