When square pipes are used in plumbing
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- Issue Time
- Nov 6,2025

Waste and rainwater systems: Square pipes are often used for drainage and downspout applications because of their appealing look and straightforward installation process.
Industrial applications: Stainless steel square pipes are used in specific industries for plumbing, particularly where corrosion resistance is needed, such as in dairy and oil/gas applications.
Corrosion-resistant environments: Galvanized square pipes serve as an ideal option for water supply networks in corrosive conditions, including outdoor or agricultural areas.
Their flat sides facilitate straightforward alignment and wall installation, while also lending a contemporary, architectural appearance to visible pipes. Nevertheless, in high-pressure water or gas applications, round pipes continue to be the favored option, as their cylindrical form guarantees more seamless flow, reduced friction, and uniform pressure distribution. The corners of square pipes can accumulate debris and cause turbulence, which diminishes flow effectiveness over the long term. Furthermore, since the majority of plumbing components are made for round pipes, square tubing often requires specialized connectors.