Can square pipes be used for plumbing?

Yes, square pipes can be used for plumbing.Square pipes, also called square tubes or hollow structural sections, are widely used in construction and industrial applications for their strength and clean appearance. In plumbing, they can also be used — especially in low-pressure or gravity-fed systems such as rainwater downspouts, drainage lines, and decorative installations. Made from materials like PVC, stainless steel, or galvanized steel, square pipes can safely carry fluids when high pressure is not required. Their flat surfaces make alignment and wall mounting easy, and they add a modern, architectural look to exposed piping. However, for high-pressure water or gas systems, round pipes continue to be favored since their circular cross-section guarantees more uniform flow, reduced resistance, and balanced pressure distribution. Square pipes feature corners that may accumulate sediment and cause flow disturbances, which can diminish efficiency over the long term. Furthermore, the majority of plumbing fixtures are engineered for round pipes, meaning square tubing often requires specialized fittings. In summary, square pipes are appropriate for low-pressure plumbing, drainage, or design-oriented applications, whereas round pipes are still the superior choice for primary water supply networks. When properly installed and manufactured from high-grade materials, like those supplied by Tianjin Yuantai Derun Group, square pipes can offer robust, space-saving, and aesthetically pleasing options for contemporary engineering and architectural uses.