Heavy-Duty Stainless Steel Siphon Drain with Aluminium Funnel Baffle for Warehouse Roof Siphonic Roof Drain

The Vantra Aluminium Funnel Baffle Siphon Drain, manufactured by Guangdong Wanquan, is a heavy-duty stainless steel roof outlet engineered for commercial steel buildings. Designed as a long-service drainage solution, it is suited to shopping malls, exhibition halls, and large commercial rooftops where reliability over many years is essential.

• High drainage efficiency
• Fewer drainage pipes
• Space saving design

Durability is central to this drain's design. The stainless steel flange resists rain, damp conditions, and even salty coastal air, effectively ignoring rust and oxidation. The aluminium funnel baffle receives a special surface treatment, so intense sunlight and wide temperature swings cannot make it brittle, warp, or fade over the seasons. The HDPE pipe body is equally resilient, refusing to crack or age prematurely.

The rubber gaskets are equally dependable. These flexible sealing components maintain their grip through hot spells, cold snaps, and prolonged rainy seasons. They do not shrink, harden, or fail after a few years, which helps eliminate the roof leaks that can otherwise disrupt operations. Before shipping, every drain undergoes salt spray and accelerated ageing tests to confirm it can withstand demanding weather conditions.

The solid baffle assembly withstands impacts from flying leaves, gravel, and rushing rainwater without breaking. It continues to block debris and prevent air intake, reliably forming the siphon effect storm after storm. Compared with lower-cost drains that require frequent replacement, this unit stays in service and reduces maintenance workload — fewer part replacements and fewer emergency site visits.

The drain bolts neatly onto steel roof panels and is compatible with standard HDPE siphon pipelines. Multiple sizes are available to suit different project requirements.

Guangdong Wanquan supplies drawings and technical support for global contractors. For a siphon drain that delivers long-term performance, the Vantra model offers toughness, low maintenance, and extended service life.

The pipes are made from 100% new material with excellent corrosion resistance. They withstand a variety of chemical and electrochemical corrosion. Under normal working conditions, they can be used for more than 50 years.

We accept OEM and ODM orders according to customer drawings, and OEM service is available. We can also apply your logo to our products. Every unit is 100% tested before shipment.

Die casting offers tolerances ranging from +/-0.003" to 0.005" per inch, and even as tight as +/-0.001" depending on customer specifications.

Die cast parts can be produced with smooth or textured surfaces and a variety of paint and plating finishes. Finishes can be selected to protect against corrosion and improve cosmetic appearance.

A relevant sample fee usually applies and is refundable when the order reaches a certain quantity. Samples help confirm the product meets your requirements. Sample lead time is typically 2–4 days, with 10–12 days for batch goods.

Our twenty-four-hour service allows you to send information at any time of the day or night. We will reply within 12 hours.

We hold a range of patents and maintain our own hydraulic calculation reference materials. Our design team produces customized products and can also design products based on your description.