What's Different about the Vortech Super Siphon?

Siphon dosing has been around for a long time as an effective way to dose effluent to disposal fields.  Early siphons were made of cast iron and used valves or floats or flapper valves to control the flow of water.  Not surprisingly, these tended to corrode over time... or the valve/floats/flappers would wear or become dirty and stop working reliably.


Modern dosing siphons are made of non-corrosive materials and use an ingenious design where a plug of air & water within the siphon piping restricts the flow of water until enough water pressure builds up to expel the blockage allowing the siphon to purge a set amount of liquid and reset.


There are different manufactures of siphons on the market?  Are all siphons created equal?


The simple answer is no, like everything else siphon design has evolved over time.  The Super Siphon is the result of 15 years of development experience in siphon design and has distinct advantages over other models on the market.


The Super Siphon Will Not Stall-


Most siphons on the market work well within a range of flow rates but will stall if the flow rate is higher or lower than its capabilities. When a siphon stalls, it no longer acts as a cyclic valve and just allows liquid to trickle through it with no dosing action.  If the siphon isn't correctly designed or installed for the system (or more accurately the system hasn't been adequately designed or constructed around the limitations of the siphon) the siphon can stall and trip in to a trickling mode from which it won't recover until the restriction is removed, the tank drained and the siphon re-primed.  Even more of a problem is that the only way to know if it has stalled is to open the dosing chamber of the septic tank and watch the action of the siphon.  This is something most homeowners don't particularly want to do regularly.  Trickling effluent to disposal fields has been found to be the leading cause of disposal field failure and may require an entirely new field to be constructed.

One of the most significant improvements of the Super Siphon over other designs on the market is the range of flow rates over which it will operate.  With the Super Siphon there is no maximum flow rate and flow rates can be reduced and even completely stopped (by placing your hand over the outlet for example) without affecting the siphon's operation, in other words; the Super Siphon will not stall, and will continue it's cyclic operation when the restriction (or your hand) is removed.

The Super Siphon has a Field Adjustable Drawdown-

Another advantage of the Super Siphon is its draw down distance is adjustable.  The volume of liquid dosed is a function of the vertical height the siphon drains for each dose (the drawdown distance) and the area of the dosing tank the siphon is working in.  Most siphons have a fixed drawdown distance which limits the tank options and/or the volume of the dose sent to the disposal field.  The Super Siphon however can be modified for drawdowns between 190mm and 720mm by any drainlayer in the field simply by drilling a 6mm hole in the appropriate location in the inlet tube of the siphon.  This allows for much more flexibility in tank and volume selection during the design process.  For special applications requiring more than 700mm of drawdown the Super Siphon can be special ordered to meet almost any requirement.

When selecting a siphon for a dosing system it is important to get the most reliable and flexible design on the market- the Super Siphon.

Septic tanks with Super Siphon

Standard two chamber septic tanks

(with a super siphon sitting on top)



Super Siphon distribution manifold

Shutoff and distribution manifold

at the top of a LPED disposal field



Super Siphon squirt

A "squirt test" of lateral lines

before being slid in the perforated

pipe trenches