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Lead-Free Brass Boiler Drain | RW-504AB Series | MNPT x Hose
$12.25
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Lead-Free Brass Boiler Drain | RW-504AB Series | MNPT × Hose
Red-White Valve’s RW-504AB Lead-Free Brass Boiler Drain delivers reliable, long-term performance for draining and controlling water flow in residential and commercial systems. This ECO-VALVE model is manufactured from ASTM B927 C27450 brass and certified to NSF/ANSI 61 & 372 and AB1953, ensuring full compliance with safe drinking water regulations.
Key Features
- Certified Lead-Free Construction — Built from ASTM B927 C27450 brass, meeting AB1953 and NSF/ANSI 61 & 372 standards for potable water use.
- Durable, Heat-Resistant Design — Rated for 125 CWP and 180°F max temperature; suitable for a range of plumbing and HVAC systems.
- MNPT × Hose Connection — Threaded ends comply with ASME B1.20.1-NPT; the ½″ model also accepts copper tube for solder joints.
- No-Kink Spout — Provides smooth, unrestricted flow and prevents hose binding during drainage operations.
- Reliable Sealing Components — Features NBR 70SH seat gaskets and PTFE bonnet gaskets for superior leak protection.
- Versatile Applications — Ideal for boilers, water heaters, and plumbing systems requiring controlled drainage or flushing.
Pressure / Temperature Rating
| Pressure Rating | Max Temperature |
|---|---|
| 125 CWP | 180 °F max |
Connection Working Pressure
| Solder Used in Joint | Working Temp (°F) | Max Working Pressure (PSI) |
|---|---|---|
| 95-5 Tin Antimony (ASTM B32 Grade 95TA) | 100 | 500 |
| 150 | 400 | |
| 200 | 300 | |
| 250 | 200 |
Dimension / Weight
| Size | T | S [in] | F | A [in] | C [in] | H [in] | B [in] | P [in] | D [in] | Weight [lb] |
|---|---|---|---|---|---|---|---|---|---|---|
| ½″ | ½ – 14 NPT | 0.627–0.631 | ¾ – 11.5 NH | 1.46 | 0.61 | 3.43 | 2.09 | 0.51 | 0.47 | 0.44 |
| ¾″ | ¾ – 14 NPT | — | ¾ – 11.5 NH | 1.46 | 0.62 | 3.44 | 2.09 | 0.51 | 0.47 | 0.46 |
Material Construction
| # | Part | Material | Specification |
|---|---|---|---|
| 1 | Body | Lead-Free Brass | ASTM B927 C27450 |
| 2 | Stem | Lead-Free Brass | ASTM B927 C27450 |
| 3 | Seat Gasket | NBR 70SH | NSF Approved |
| 4 | Bonnet Gasket | PTFE | — |
| 5 | Bonnet | Lead-Free Brass | ASTM B927 C27450 |
| 6 | Packing Ring | PTFE | — |
| 7 | Packing Nut | Brass | ASTM B124 C37700 |
| 8 | Handwheel | Steel | — |
| 9 | Disc | Aluminum | — |
| 10 | Nut | Steel / Zn Plated | ASTM A36 |
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.