DZR Brass Fittings and DZR Brass Components – Dezincification Resistant Brass by A1 Metallics
A1 Metallics is a specialist manufacturer of DZR brass fittings and DZR brass components (Dezincification Resistant Brass) for water supply systems, HVAC, fire suppression, and plumbing applications where conventional brass would fail due to dezincification corrosion. Our DZR brass fittings and components are specified by US plumbing engineers, water utilities, and building contractors in regions with aggressive water chemistry that causes rapid dezincification in standard brass.
What is Dezincification and Why Does it Matter?
Dezincification is a form of corrosion specific to brass alloys where zinc selectively leaches out of the alloy, leaving behind a porous, weak copper-rich structure that may develop leaks, blockages, or catastrophic failure. Dezincification is most severe in high-zinc brass (above 15% Zn) in contact with soft, acidic, or chlorinated water—conditions common in many US municipal water systems, particularly in the Southwest and coastal areas.
DZR brass (also called dezincification-resistant brass) uses small additions of arsenic (As), antimony (Sb), or phosphorus (P) to inhibit the zinc-selective leaching mechanism, extending service life dramatically in dezincification-prone water conditions.
DZR Brass Compression Fittings
DZR brass compression fittings—including straight couplings, elbows, tees, reducers, and adapters—are used to connect copper and plastic tubing in potable water systems without soldering. Our DZR compression fittings are manufactured to BS EN 1254-2 and ASTM F1760 standards and are approved by WRAS (Water Regulations Advisory Scheme) and KTW/DVGW (Germany), confirming suitability for potable water service. Available from 1/4″ to 2″ OD tube sizes.
DZR Brass Push-Fit Fittings
DZR brass push-fit fittings provide tool-free, fast connections for copper, CPVC, and polybutylene (PB) tubing. The stainless steel collet teeth grip the tube and prevent pull-out while an EPDM O-ring provides the seal. Our DZR push-fit fittings meet ASTM F1807, ASSE 1061, and BS EN 14383 for residential and commercial plumbing installations. Available in 1/2″ and 3/4″ sizes for the US market.
DZR Brass Threaded Fittings
DZR brass NPT threaded fittings including couplings, elbows, tees, nipples, bushings, and unions for use in commercial plumbing, gas distribution, and water treatment systems. Available in 1/8″ NPT through 4″ NPT. Our threaded DZR fittings are manufactured to ASTM B283/B124 with arsenic-treated DZR brass conforming to BS EN 12164 and EN 12420 standards.
DZR Brass Valve Bodies and Fittings
DZR brass ball valve bodies, gate valve bodies, and check valve bodies for potable water and HVAC hydronic systems. DZR brass valves are preferred for hot water systems (up to 180°F/80°C) and recirculation systems where dezincification risk is elevated. Available in full bore and reduced bore configurations from 1/4″ to 4″ in compliance with ASTM B283, MSS SP-110, and AWWA C800 standards widely specified in US municipal water systems.
DZR Brass Hose Barb Fittings
DZR brass hose barb fittings for water supply hose connections in systems requiring dezincification resistance. Available in NPT (ASME B1.20.1) and BSPT (BS 21 / ISO 7-1) thread forms from 1/8″ to 1″ in straight, elbow, and tee configurations.
DZR Brass CNC Machined Parts
Custom DZR brass CNC turned and milled parts for water meters, water treatment equipment, pressure regulators, and plumbing manifolds. All machined from certified DZR brass bar stock with material test certificates confirming arsenic inhibitor content and dezincification resistance test results per ISO 6509.
DZR Brass Alloy Grades – International Equivalents
| Grade | UNS (USA) | BS / BSEN | DIN / EN (Europe) | ISO | Arsenic % | Application |
|---|---|---|---|---|---|---|
| DZR Brass (As-inhibited) | C35330 | CW602N (BS EN 12165) | CuZn36Pb2As / 2.0469 | — | 0.02–0.06% | Standard DZR fittings; BS EN 1254 |
| DZR Brass (Forgings) | C37700 | CW614N / CZ122 | CuZn39Pb2 / 2.0402 | ISO 426-2 | 0.02–0.04% | Hot stamped DZR components |
| DZR Brass (Rod/Bar) | C36500 | CW606N | CuZn36Pb1.5As | — | 0.02–0.05% | DZR machined fittings; turned parts |
| Naval Brass (alternate DZR) | C46400 | CZ112 | CuZn38Sn1 / 2.0530 | ISO 426-2 | — | Marine DZR applications; Sn inhibitor |
DZR Test Standards and Approvals
- ISO 6509: International test method for dezincification resistance of copper alloys containing zinc—dezincification depth ≤ 200µm for DZR-grade material
- WRAS (UK): Water Regulations Advisory Scheme approval for use in UK potable water installations
- KTW/DVGW W270 (Germany): German approval for water systems; stringent microbiological growth test
- NSF/ANSI 61: US health effects standard for drinking water materials—all our DZR parts can be supplied with NSF 61 compliance documentation
- ASTM B858: US standard ammonia vapor test for stress-corrosion cracking resistance of copper alloy fittings (complements dezincification testing)
Why Choose A1 Metallics for DZR Brass Fittings and Components?
- DZR Brass Specialist: Dedicated supply chain for DZR brass raw material; ISO 6509 test certificates available for all material lots
- WRAS and DVGW Approved Material: DZR brass sourced from approved mills with dezincification test certificates
- NSF/ANSI 61 Documentation: Material compliance declarations for US potable water market
- Custom DZR Machined Parts: CNC machining capability for complex DZR brass parts to customer drawings
- Complete DZR Fittings Range: Compression, push-fit, threaded, and barbed fittings in all standard sizes
- ISO 9001:2015 Quality Management System
- Competitive Factory Pricing from India with reliable export to US customers
Frequently Asked Questions – DZR Brass Fittings
Q1: When should I specify DZR brass instead of standard brass?
Specify DZR brass when your water supply has: pH below 7.4 (acidic), high chloride content (>50 mg/L), high sulfate content, soft water (low TDS), elevated temperatures (>140°F/60°C in recirculating hot water), or if you are in a region where dezincification failures in brass fittings have been reported. Water utilities in southern California, Florida, and Pacific Northwest often have water chemistry that promotes dezincification.
Q2: Is DZR brass the same as lead-free brass?
No. DZR brass is formulated to resist dezincification through arsenic inhibitor additions, but standard DZR brass (CW602N / C35330) still contains lead (~1.5–2%) as a machining aid. For applications requiring both dezincification resistance AND lead-free compliance (NSF/ANSI 372), specify our lead-free DZR brass options such as C69300 with antimony inhibitor, which provide both properties.
Q3: How is dezincification resistance tested?
The primary test is ISO 6509 (modified Merivale test), where a polished sample is exposed to a 1% copper chloride solution at 75°C for 24 hours. The maximum dezincification depth is measured microscopically. DZR brass must show ≤ 200µm maximum dezincification depth. We provide ISO 6509 test certificates with all DZR brass orders on request.
Q4: Are DZR brass fittings required by US building codes?
The US Uniform Plumbing Code (UPC) and International Plumbing Code (IPC) do not universally mandate DZR brass, but some local amendments and water utility specifications require it. AWWA C800 for underground water service fittings references dezincification resistance. Many US engineers specify DZR brass proactively in high-risk water quality areas to avoid callbacks and liability.
Q5: What is the minimum order for DZR brass fittings?
For standard catalog DZR compression and threaded fittings, MOQ starts from 500 pieces per size. For custom DZR machined parts, MOQ is 1,000 pieces. Sample orders (50–100 pieces) are accommodated for customer qualification testing.
Q6: Can DZR brass fittings be used with PEX tubing?
Yes. DZR brass insert fittings and expansion fittings for PEX tubing are available. For PEX systems in dezincification-risk areas, specifying DZR brass fittings instead of standard brass insert fittings is recommended. Our DZR brass PEX fittings comply with ASTM F1807 and ASSE 1061 standards.
Contact A1 Metallics for DZR Brass Fittings and Components
A1 Metallics is India’s specialist source for DZR brass fittings and DZR brass components for the US plumbing, HVAC, water utility, and industrial water treatment markets. Contact us with your DZR brass requirements—thread type, fitting configuration, material certification requirements—and receive a competitive quote within 24 hours. We supply US plumbing distributors, water treatment OEMs, and engineering procurement teams with reliable quality and full compliance documentation.
