Where are brass angle valves commonly used in plumbing?

Brass angle valves are essential components in both residential and commercial plumbing systems due to their durability, corrosion resistance, and precise flow control. Here’s a detailed breakdown of their common applications:

1. Residential Plumbing

A. Fixture Supply Lines

  • Sinks (Kitchen & Bathroom):
    • Connect between water supply pipes and faucet flex lines.
    • Allow quick shut-off during repairs or faucet replacement.
  • Toilets:
    • Installed on the wall/floor water supply line to control flow to the toilet tank.
  • Bidets:
    • Isolate water supply for maintenance.

B. Appliances

  • Washing Machines:
    • Connect to hot/cold water hoses (typically ¾” threaded outlet).
  • Dishwashers:
    • Shut off water for filter cleaning or leak emergencies.
  • Water Heaters:
    • Used as isolation valves for inlet/outlet connections.

C. Outdoor & Utility Areas

  • Garden Faucets:
    • Control outdoor spigots to prevent freezing damage in winter.
  • Water Softeners/Filter Systems:
    • Isolate bypass loops during maintenance.

2. Commercial/Industrial Plumbing

A. HVAC Systems

  • Boiler Feed Lines:
    • Regulate water flow in heating systems (high-temperature rated valves required).
  • Chilled Water Lines:
    • Angle valves with PTFE seals prevent condensation leaks.

B. Food Service & Hospitals

  • Lead-Free Brass Valves (NSF 61 Certified):
    • Used in potable water systems for sinks, sterilizers, and medical equipment.

C. Industrial Machinery

  • Coolant/Chemical Lines:
    • DZR (Dezincification-Resistant) brass valves handle mild corrosive fluids.

3. Specialty Applications

  • Aquariums/Water Features:
    • Control water flow in recirculation systems.
  • Gas Lines (if certified):
    • Some brass angle valves meet EN 331 standards for low-pressure gas shut-off.

5. Why Brass?

  • Durability: Resists scaling and high pressure (up to 600 PSI for industrial valves).
  • Safety: Lead-free options comply with U.S. Safe Water Drinking Act.
  • Heat Resistance: Handles hot water (up to 250°F/121°C) without deformation.

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