HDPE Butt Fusion Siphon Roof Drain Rainwater Hopper for Siphonic Drainage

A professional siphonic roof drain rainwater hopper manufactured from high-density polyethylene, specifically designed for siphonic roof drainage systems.

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Category: HDPE Siphonic Fittings

HDPE Siphonic Fittings

Product Overview

A professional siphonic roof drain rainwater hopper manufactured from high-density polyethylene, specifically designed for siphonic roof drainage systems. This HDPE siphon roof drain is engineered with a precision anti-vortex baffle that primes the siphonic action fast and sustains full-bore flow through design storms. Certified to ISO 8770, EN 1519-1, CJ/T 245 and AHRI 1060 for DN 50 to 315 mm systems.

Quick Information

Diameter Range: DN 50 - 315 mm
Applicable Standards: ISO 8770, EN 1519-1, CJ/T 245, AHRI 1060
Stock: In stock

Specification Table

Specification
DN56
DN63
DN75
DN90
DN110
DN125
DN160

Key Features

Precision Anti-Vortex Baffle: The HDPE siphon roof drain uses an engineered baffle that blocks air intake, so siphonic priming happens fast and stays stable.
Certified Siphonic Performance: This siphonic rainwater hopper meets ISO 8770, EN 1519-1, CJ/T 245 and AHRI 1060 flow ratings for verified design capacity.
PE100 Weather Resistance: The HDPE siphon roof drain resists UV, frost, ponding and rooftop chemicals for decades of maintenance-free service.
Low-Profile Roof Integration: This siphonic rainwater hopper sits close to the membrane, suiting both new build and retrofit roof drainage.
Leak-Free Fusion Joints: The HDPE siphon roof drain welds to HDPE pipe by butt or socket fusion, forming a homogeneous watertight system.
Wide Size Range: This siphonic rainwater hopper covers DN 50 to 315 mm to match any siphonic roof drainage calculation.

Production

Raw Material

Every HDPE siphon roof drain is molded from certified virgin PE100 resin with carbon black UV stabilizer, batch-tested for melt flow rate and density.

Molding Process

Each siphonic rainwater hopper is injection molded with precision cores that form the baffle, bowl and outlet in one cycle, holding dimensional tolerance within 0.1 mm.

Quality Control

Batches of HDPE siphon roof drains are sampled for hydraulic flow testing against AHRI 1060 ratings, dimensional gauging and fusion joint integrity per ISO 8770.

Applications

Airport terminals and exhibition centers use the HDPE siphon roof drain for high-capacity drainage over vast roof spans.
Industrial plants and warehouses rely on this siphonic rainwater hopper to minimize downpipes and free up floor space.
High-rise towers install the HDPE siphon roof drain to handle design storms with compact risers.
Commercial complexes choose this siphonic rainwater hopper for certified, maintenance-free roof drainage.