Advanced low-noise drainage pipe with hollow spiral inner structure that slows vertical water flow. Designed for high-rise buildings and sound-sensitive applications. Provides excellent acoustic control and long service life in vertical wastewater stacks.
The PVC-U Hollow Spiral Silencing Pipe is engineered for low-noise vertical drainage systems, featuring a unique spiral inner structure that disperses and slows down wastewater flow to reduce noise caused by turbulence. Manufactured with unplasticized polyvinyl chloride (PVC-U), this pipe combines strength, chemical resistance, and acoustic performance, making it suitable for high-rise residential and commercial buildings. It is often used in applications where silent operation and system durability are both essential.
Key Features
Made from rigid, non-toxic PVC-U material
Spiral inner wall slows down vertical water flow, reducing flushing noise
Outer wall is smooth and impact-resistant for easy installation
High chemical and corrosion resistance
Designed for vertical and centralized drainage stacks
Flame-retardant and UV-stable
Excellent acoustic insulation, reducing noise transmission between floors
Available Sizes & Standards
Outer diameters range: 50mm to 300mm or customized
Standard lengths: 4m or customized
Connection: Socket with rubber ring or solvent welding
Complies with standards: GB/T 33608
Applications
High-rise apartment buildings
Hotels, office towers, hospitals
Quiet zones: bedrooms, schools, libraries
Centralized bathroom stacks and vertical main drainage
Projects with acoustic requirements or sound-proofing standards
Certifications
ISO 9001 – Certified quality system
CE Certified – For European export standards
GB/T 33608 – Chinese drainage pipe standard
Tested for sound insulation performance
Packaging & Delivery
Supplied with protective end caps
Pipes bundled and shrink-wrapped for transport
Brand/logo printing available (OEM supported)
Available in container or bulk transport formats
Export & Market Position
This pipe is supplied under all Gongchi Group brands, including Gongchi, Huangpin, JiuSheng, Dishui, BenSu, and Shuanggu. The Hollow Spiral Silencing Pipe is a preferred choice in modern, quiet-building designs across Asia, the Middle East, and North Africa, especially in projects requiring both vertical efficiency and acoustic comfort.
