About Midland Metal
Quality Brass Fittings & Fluid Conveyance Components
Midland Metal is a premier supplier of high-quality brass and stainless-steel fittings, providing critical plumbing connectors and fluid-transfer components for marine systems, RVs, industrial applications, and general-purpose fluid conveyance. The company manufactures cast brass and barbed connector solutions to strict industrial tolerances, ensuring leak-free performance in fuel lines, water systems, and hydraulic circuits.
The Midland Metal product portfolio includes NPT-threaded brass fittings (elbows, tees, unions, adapters), ball valves in brass and stainless steel, hose clamps for securing tubing and hose lines, hydraulic adapters with JIC and SAE flange connections, pneumatic accessories, and barbed connectors for soft tubing. All products are engineered for durability and corrosion resistance.
Materials include dezincified-resistant (DZR) brass for potable water contact, stainless steel for seawater and harsh environments, and chrome-plated steel for appearance and corrosion protection. Pressure ratings span low-pressure water service (0–300 PSI) through high-pressure hydraulic systems (2000+ PSI for JIC adapters).
Applications include boat water systems, RV plumbing and holding tanks, home heating (hydronic) loops, irrigation and landscape water supply, industrial process piping, hydraulic equipment interconnection, and general maintenance fluid transfer. Midland's reputation for quality and broad availability makes them a standard reference for marine and RV aftermarket upgrades.
ChatMRO connects plumbers, marine technicians, and industrial maintenance professionals instantly with Midland Metal components—specify your application (water, fuel, hydraulic, air), fitting type, thread size (NPT, BSP, metric), and material preference, and our AI surfaces compatible fittings with pressure ratings and lead times from our indexed 30M+ component database.
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Frequently asked questions
Why is DZR brass preferred for potable water applications instead of standard brass?
DZR (dezincified-resistant) brass is treated to prevent selective leaching of zinc during contact with certain water chemistries—a process that weakens fittings and can cause sudden failure. All potable water fittings must be NSF 61 certified DZR brass or stainless steel. Using non-DZR brass in water systems violates plumbing codes and voids certifications.
Can I use Midland Metal brass fittings with high-pressure hydraulic hose, or do I need JIC adapters?
Brass NPT fittings are rated for 300 PSI or less; high-pressure hydraulic systems (1000+ PSI) require JIC (SAE) flange adapters with metal seals. Attempting to use NPT fittings on high-pressure lines risks leakage, hose burst, and safety hazards. Always match fitting type to system pressure—Midland manufactures both product lines.
What size hose clamp should I use with Midland barbed connectors?
Hose clamp size depends on hose ID (inner diameter), not the barb size. A standard rule: 2 clamps per barbed fitting (one tight below the barb, one above for redundancy). Use stainless steel clamps for fuel and marine applications (brass clamps can corrode in saltwater). Midland technical guides specify clamp sizes for each barb profile.
Are Midland ball valves suitable for fuel systems (gasoline, diesel)?
Brass ball valves are generally acceptable for diesel and low-volatility fluids. However, gasoline and aromatic-rich fuels can swell some elastomers used in valve seals. Always verify chemical compatibility in Midland's fluid charts before specifying brass ball valves for fuel systems—stainless options are recommended for maximum compatibility.
Can I solder Midland brass fittings, or are they sweat-proof?
Most Midland brass fittings are sweat-compatible—they accept solder joints without degradation. However, some barbed or threaded designs are not suitable for soldering (risk of seal damage). Verify in Midland catalogs; fittings designated for sweat connection will be marked. When in doubt, use NPT threaded connections with thread-sealant tape.