News & Media

News Items

Installation Guidelines updated 20-Oct-2017

Great News for Sales Agents, builders, landscaper and others who have downloaded the Guidelines in the past: The Guidelines have been updated to ..

We are exhibiting at the Build & Renovating Expo in Melbourne 30-Jun-2014

(http://www.buildexpo.com.au) The Build & Renovating Expo will be held 4-6 July 2014 at the Melbourne Exhibition Centre. ..

Public Launch of Capiphon™ Drainage at Agfest in Tasmania 27-Apr-2014

GWST Australia goes public with Capiphon™ Drainage at Agfest this week (1-3 May). We will be on site with Geotas, our Tasmanian Distributor..

Snails know best! 23-Feb-2013

Snails know where to go to get water – inside slotted pipe! Our tank tests have shown that some 22 mm of water remains inside a sl..

Media Downloads

A New Sub-Surface Irrigation System Further Developments - Slide Pack 2014 - A New Sub-Surface Irrigation System Further Developments - Slide Pack 2014 3667 KB

A trial in a Southern Tasmanian vineyard showed that Capiphon Irrigation can result in the same fruit yield as the conventional drip system but uses less water. Soil moisture monitoring showed that water is effectively delivered to the root zone. Further work is required to bring the technology to a commercial reality.

Drainage Characteristics of Capiphon ...(PRESENTATION SLIDE PACK) - Drainage Characteristics of Capiphon ...(PRESENTATION SLIDE PACK) 2570 KB

Slide presentation of the ICID paper

A New, Low Energy, Sub-Surface Irrigation System-Preliminary Investigations (G R Fenn 2012) - A New, Low Energy, Sub-Surface Irrigation System-Preliminary Investigations (G R Fenn 2012) 1443 KB

Sub Surface Irrigation Preliminary Investigations showing Capiphon technology performing better than existing products (ICID Conference Adelaide)

Enhanced Biofilter Treatment of Stormwater by Optimizing the Residence Time (Redahegn Sileshi, Rober - Enhanced Biofilter Treatment of Stormwater by Optimizing the Residence Time (Redahegn Sileshi, Rober 317 KB

This paper describes the initial tests investigating the basic hydraulic properties and the clogging potential of Capiphon. A pilot-scale biofilter using a trough 3m long and 0.6 x 0.6m in cross section was used to test the variables affecting the drainage characteristics of Capiphon as an underdrain material (such as length, slope, hydraulic head, and type of sand media).

Examining the Clogging Potential of Underdrain Material for Stormwater Biofilter (Redahegn Sileshi, - Examining the Clogging Potential of Underdrain Material for Stormwater Biofilter (Redahegn Sileshi, 465 KB

The tests were conducted using two different species of green algal that were encouraged to grow in the biofilter device for several weeks before draining. The results indicated that the biofouling had only a small effect on the discharge rates, even though the algal growth was extensive

Avoiding Underhouse Flooding - Avoiding Underhouse Flooding 776 KB

Capiphon was installed behind a retaining wall and under a concrete slab as part of a major renovation of an old Queenslander house in Paddington, a Brisbane suburb. The underlying rock is highly permeable with water gushing from the strata. Neighbouring properties had spent many thousands in remediation.

Capiphon drawing water up in tank test - Capiphon drawing water up in tank test 469 KB

These snapshots from a video show the water level in a test tank dropping below the outlet through which the belt passes.

Capiphon Flow Rates - Capiphon Flow Rates 438 KB

A summary of Chinese and Australian research investigating flow rates in free water and in soil. Especially designed for engineers who need to know.

Capiphon Safety Data Sheet - Capiphon Safety Data Sheet 250 KB

Physical, chemical, environmental and other factors involved in using and being exposed to Capiphon The information set forth herein has been gathered from standard reference materials and/or supplier test data and is, to the best knowledge and belief of GWST Pty Ltd, accurate and reliable. Such information is offered solely for your consideration, investigation and verification, and it is not suggested or guaranteed that the hazard precautions or procedures mentioned are the only ones, which

Drainage Characteristics of Capiphon Belt and Pipe - Some Comparisons with slotted pipe with sock - Drainage Characteristics of Capiphon Belt and Pipe - Some Comparisons with slotted pipe with sock 1116 KB

Paper presented to the International Commission on Irrigation & Drainage (Adelaide June 2012): Initial studies showed that Capiphon drainage technology out performs slotted pipe with sock (Drain Coil) in soil. It also had a higher flow-rate in free water at low hydraulic head. In soil when flooded, Capiphon commenced flow before, and continued to drain long after Drain Coil had ceased. Its capillary and syphonic action resulted in drawing water upwards, pulling the water table down to at leas

Draining Golf Course Bunkers - Leonay, NSW - Draining Golf Course Bunkers - Leonay, NSW 941 KB

A number of bunkers on the course do not drain after rain. The bunker sand has a high clay content with a hard-pan underneath. The problem is exacerbated by the minimal slope across the course. Several unsuccessful attempts had been made over the years using Ag Pipe and slotted pipe. In one case, there were three slotted pipes and an Ag Pipe in the same bunker.

Flow Reports for Capiphon Drain Belt (Translated) - Flow Reports for Capiphon Drain Belt (Translated) 290 KB

Translation from the original Chinese report, conducted by the Chinese Research Institute of Water Resources and Hydroelectric Power.

On the Edge - Capiphon overcomes space restriction - On the Edge - Capiphon overcomes space restriction 906 KB

The owners wanted to rebuild the room on the same footprint and wanted to maximise the usable space. The designer (John Weston Architectural Design) had previously used Capiphon in a similar situation so suggested to the owners to pull the building in from the boundary by 40mm, sufficient to allow for a Capiphon pipe to be used.

Overcoming Gravity with Capiphon - Overcoming Gravity with Capiphon 575 KB

The balconies of a new apartment block remained flooded after rain. It was apparent that the outlet drain sat above the floor of the balcony. This may not have been considered to be a major problem because a tile floor was to be suspended on adjustable pads, concealing the water on most balconies. However, on some, the water level was so deep that a residue of silt remained on the tiles after the rain event.