FAQ

Q: What are the differences between conventional and siphonic drainage systems?
Q: How does the cost of installation of a siphonic system compare to an equivalent “traditional” storm water system?
Q: What are the main benefits? Why use it?
Q: What special considerations are needed in the layout of roof drainage when using a siphonic roof drainage system?
Q: Where do siphonic systems terminate? How is the connection to the soakwell system made?
Q: Can the horizontal piping run uphill or can it offset up and over an obstruction?
Q: Is there any special maintenance required for siphonic drainage systems?
Q: Are secondary (overflow) systems necessary?

Q: What are the typical down pipe sizes?

Q: Is the design of the box gutter incorporating siphonic drainage different to that of a conventional downpipe system?
Q: How much room is required for the siphonic drainage system underneath the (box) gutter?
Q: Is there a minimum roof area required for siphonic drainage?
Q: How far can a siphonic drainage system run horizontally?
Q: Does siphonicroof drainage improve the green star rating of my building?

 

 

A: Downpipe size depends on many factors! The table below is indicative only and needs to be confirmed by our design engineers, however it acts as a helpful guide. (For flowrates below 10 l/s and above 100 l/s please contact our office for further assistance).

Dropper height

10 l/s

20 l/s

40 l/s

60 l/s

80 l/s

100 l/s

4m

Ø 90mm

Ø 110mm

Ø 125mm

Ø 160mm

Ø 200mm

Ø 250mm

6m

Ø 75mm

Ø 90mm

Ø 110mm

Ø 125mm

Ø 160mm

Ø 200mm

8m

Ø 75mm

Ø 90mm

Ø 110mm

Ø 125mm

Ø 160mm

Ø 200mm

10m

Ø 63mm

Ø 90mm

Ø 110mm

Ø 125mm

Ø 160mm

Ø 200mm

12m

Ø 63mm

Ø 90mm

Ø 110mm

Ø 125mm

Ø 160mm

Ø 160mm

Contact Us with any enquires at info@siphonic.com.au

 
Office Locations || Perth || Melbourne