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Ultraflow Siphonics Drainage System

Ultraflow’s flawless track record has allowed us to be the pioneer of siphonic drainage systems in our region since 1994. Siphonics is an innovative roof drainage system engineered to combat the limitations of traditional gravity based systems. This system is able to transport large volumes of rain water from the roof at high velocities.

The basic principle of a siphonic drain focuses around eliminating air intrusion within the pipework, allowing for negative pressure to draw the water through horizontal pipework with zero grade. Implementing a siphonic system in a building opens avenues for architectural flexibility and cost savings as a result of smaller pipework and a reduced number of downpipes. With constant innovation, Ultraflow's siphonic drain has been refined over several generations to produce the best performance possible.

  • Double intake lip: Double intake lip provides a secondary drainage route if large debris enters gutter and surrounds outlet.
  • Air baffle: Anti-vortex fins facilitate siphonic and priming flow and enables higher flow rates. Our UV stabilised polypropylene air baffle prohibits entry of air into the pipe system creating full bore siphonic flow.
  • Steel outlet body: Stainless steel outlet body provides excellent corrosion resistance. Other materials are available upon request.
  • Installation: Pre-drilled rivet holes allow quick and simple installation in gutters.
  • Barrel nut: Stainless steel barrel nut with knurled finish for finger tightening allows for simple installation and easy cleaning. 
  • Instructions: Simple maintenance instructions included on baffle with website link for additional information.

Compared with conventional systems which pull air into the pipes that diminish their capacity, Ultraflow's siphonic drainage system feature roof outlets that prevent air from entering and forming a vortex, thus ensuring the system works at full capacity.

Utilising the most advanced siphonic technologies, the team at Ultraflow have designed and installed both economic and effective solutions in some of the most challenging and demanding sites in Australia.

Ideal for low-rise, high-rise and large-scale developments, the team at Ultraflow will consult, design, project-manage and install the ideal water management system to meet your needs. With an unparalleled reputation for reliability our zero design failure rate over 22 years is testament to the expertise of our team at overcoming some of the most challenging architectural designs.

Ultraflow Siphonic Drainage System

Why You Should Use Ultraflow's Siphonic Drainage System

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World Class Product

  • The flexibility of a siphonic system allows for greater aesthetic appeal and opens avenues for architectural innovations.
  • Flat gradient pipework allows for the efficient use of ceiling headroom and frees up crucial spaces within a building.
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Design Expertise

  • With less pipework and smaller sizes, an HDPE based siphonic system is your eco-friendly drainage choice.
  • Minimal pipework and environmentally sound materials with high recyclability result in a smaller ecological impact compared to most conventional drainage systems.
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Proven Performance

  • Our system is not limited to just gutters.
  • Our Ultraflow proprietary circular sump assembly provides three layers of waterproofing technology and is supplied with a sturdy class ‘C’ heelproof grate to suit slab installations.

Ultraflow Siphonics Drainage vs Conventional Drainage

Ultraflow Siphonics System Diagram

Ultraflow Siphonic Drainage Systems

The Ultraflow Siphonic drain system is made up of proprietary (Pat. Pending) outlets that incorporate an anti-vortex plate preventing air entering the pipes. The outlets are connected via short pipes of relatively small diameters to the horizontal collector pipe located just under the building roof.

The collector pipe is generally installed at the highest possible position and runs flat (no grade angle required) until it reaches connection with the downpipe. The downpipe drops into the drainage line buried in the ground and conveys the water straight into a collection tank or civil stormwater system.

The resulting absence of air in the system allows it to run 100% full of water, making use of the entire pipe section and vastly increasing flows that are 10 times faster than conventional drainage systems, not to mention offering far more design flexibility and less aesthetic impact with drainage pipes available in stainless steel, FRC and HDPE.

Conventional Drainage System Diagram

Conventional Drainage Systems

Conventional drainage systems don’t prevent air flow into the pipe which disrupts and slows their performance. As a result, conventional pipes are more cumbersome and sized for filling ratios of 20% or 33% (depending on national or local standards and regulations).

It means that considerable space and performance capacity is lost to air (normally between 67%-80%) significantly affecting architectural design. In addition, there are greater inefficiencies with more materials requirements, additional downpipes and installation costs compared to an Ultraflow Siphonic system.

To find out more about our world class Siphonics system