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PE Butt Fusion Siphon Drainage Tee

PE Butt Fusion Siphonic Drainage Bottle-Neck Tee

Drainage Tee
The siphon drainage tee features a unique design that effectively enhances drainage efficiency. Its distinctive internal structure facilitates smoother water flow, preventing blockages and water accumulation issues. Additionally, the siphonic drainage tee exhibits pressure resistance, withstanding considerable water pressure to ensure stable operation of the drainage system.
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Working Principle of Siphonic Drainage Bottle-Neck Tee

Its working principle is based on flow control and negative pressure stabilization:
  1. Its special necked-down structure reduces the pipe cross-section locally, which helps speed up the water flowandsuppress air entrainment into the pipeline.
  2. By limiting air intake and stabilizing flow velocity, it helps the system quickly form and maintain full-bore flow and stable negative pressure.
  3. This eliminates air locks and turbulence, allowing the siphonic effect to work continuously and efficiently, so rainwater is discharged rapidly and quietly.

Function

Thesiphon drainage bottle-neck tee is a key pipe fitting used in siphonic roof drainage systems.
  • It connects the horizontal branch pipe and vertical downpipe while maintaining stable negative pressure for efficient siphonic flow.
  • Its special neck‑shaped structure helps restrict air intake, stabilize water flow, and improve drainage efficiency.
  • It reduces turbulence and noise, prevents air locks, and ensures the system operates at full bore.

Usage

  1. Install the bottle-neck tee between the horizontal branch pipe and vertical main pipe according to the marked flow direction.
  2. Keep the pipeline layout as straight as possible to avoid unnecessary bends.
  3. Ensure the joint is sealed tightly and correctly connected (electrofusion or mechanical connection).
  4. Keep the inner surface clean during installation to maintain smooth flow and siphon performance.
  5. Follow the design specifications and installation instructions provided by the manufacturer.
Specification
110*50
110*75