Move the water before it moves the land.

Siphonic Systems · Siphonic Transfer Unit

Lower water already sitting in the ground and drains — when there is somewhere lower for it to go.

A self-priming system. No grid power.

It holds the closed pipe full from intake to outlet, and restores prime automatically after a loss.

High-volume flow through the outlet.

Once primed, the full closed pipe moves water from the higher intake water to the lower receiving water — without an inline electric lift motor.

Lower the water table to free up more usable land.

Solutions that scale with your problem.

Four sizes we build. On wide animated paths the number opens at the governed 225 mm portrait and resolves at the illustrative 1800 mm+ endpoint; the compact animated path ends on the governed 1000 mm portrait. The static path names the full illustrative 150–1800 mm+ range. This is not a product list.

  1. The 225 mm Siphonic Transfer Unit: stainless body with the priming chamber mounted above it, a gear-driven butterfly valve and pipe stubs to either side.
  2. The 400 mm Siphonic Transfer Unit: stainless manifold with its priming chamber and gauge above, a gear-driven butterfly valve with handwheel, and flanged connection spools to either side.
  3. The 600 mm Siphonic Transfer Unit: polyethylene manifold body with a stainless dome cap, bolted flanges and short connection spools.
  4. The 1000 mm Siphonic Transfer Unit, with a tall rising valve stem, handwheel and heavy flange rings.

Working farms

Same unit. Two very different jobs.

At Morelands, owner/operator-reported figures describe a lower groundwater table. At Narbey, the design follows a long drain, crosses a stopbank and works within a low-tide window.

Aerial view of the Morelands pasture and open drainage route, with cattle along the channel
Play videoStill frame · Morelands field film

Morelands Farm

What changed when the water table came down.

Figures supplied by Morelands Farm

  1. 225 mm
    lower resting groundwater table

    The resting level, measured in the ground — not a storm response.

  2. 400 mm
    lower open-drain level

    Almost half a metre lower in the open drains.

One operator, one site, one measurement year.

Installed Siphonic Transfer Unit manifold and connected pipe beside the Narbey field drain
Play videoStill frame · Narbey installation film

Narbey Farm

When one long drain is doing all the work.

  1. Long drain
    the route carries water away

    The video follows the existing internal drain through working ground.

  2. Stopbank
    higher ground blocks the fall

    Reclaimed land sits behind the river stopbank.

  3. Low tide
    the receiving window moves

    The design uses the river’s lower level while the tide allows it.

The arrangement is designed around the long drain, stopbank and low-tide operating window.

Preliminary site screen

See the numbers for yourself.

Enter the difference between your inlet and outlet water levels, then the approximate route. You will see the indicative screen here before we ask for any details.

Your site, drawn live

Siphon sectionParameter-driven cross-section showing terrain, water levels, pipe route, crest shape and selected drainage method. Site measurements are summarised outside the diagram.

Site screening preview

Site cross-section preview for the selected drainage method.
Current route values
200 m route2.0 m water-level difference
Your site numbers
m
m

Quick-screen route range: 1–800 m.

What your site can move

Indicative screening flow: 47.4 L/s. Water-level difference: 2.0 metres.

Worked example

Water-level difference: 2.0 m

Indicative screening flow

47.4L/s

Volume each hour
171 m³/hour
Velocity in the pipe
1.51 m/s

Steady-state screening estimate for a fully primed closed pipe — not a design figure.

Access the full site calculatorContinue with these measurements, check the route crest and choose a PE pipe before requesting your screening PDF.
Read the Engineering ReferenceSee the calculation methods, assumptions and limits, and the basis for the reported farm figures.