HDPE Butt Fusion 88.5° Cleanout Branch for Siphonic Drainage

Key Features

• Optimized 88.5° Angle: Slight inclination compared to traditional 90° cleanouts allows drain snakes or rods to enter the stack more easily along the flow direction, reducing jamming.
• Butt Fusion Joints: Both main ends fuse homogeneously with the vertical stack, creating an integral structure.
• Threaded Plug: Cleanout port is equipped with a sealed threaded plug, normally closed and opened for maintenance.
• Negative Pressure Resistant: Sealed design withstands the negative pressure encountered during full-bore siphonic flow.

Production Technology

• Injection molded with main body as straight-through structure
• 88.5° lateral branch serving as cleanout port

Critical Process Parameters

• Precision control of 88.5° ± 0.5° branch-to-main angle
• Thread fit accuracy and sealing performance between port and plug

Typical Applications

• Installation of cleanouts at the base, intermediate floors, and top of siphonic drainage stacks in high-rise buildings
• Maintenance point upstream of stack transition to horizontal run
• Stack sections requiring periodic cleaning and maintenance

Application Scenarios

• Inspection and cleaning maintenance of siphonic drainage vertical stacks
• High-rise residential and commercial building drainage systems
• Hotels, hospitals, and office buildings