Envirodrain®

Strong

Flexible & Lightweight

Easy to Install

Corrosion resistant

Economical

Strong

Flexible & Lightweight

Easy to Install

Corrosion resistant

Economical

The versatile and effective land drainage solutionThe versatile and effective land drainage solution

Product ovErviEW

Envirodrain® is the versatile solution to land drainage problems. The corrugated pipe wall is designed to provide maximum strength with minimum weight for ease of handling.

The key to Envirodrain®’s versatility is its flexibility and because it’s

supplied in long light weight coils, installation is fast and easy.

Since Envirodrain® is flexible enough to be installed continuously

around curves, the requirement for fittings is minimised. Flexibility

also ensures that the pipe can accommodate ground movement

without kinking or breaking.

When correctly installed, the corrugated walls provide Envirodrain®

sufficient strength to resist external loads, including soil, backfill

and vehicle loads.

Manufactured from either polyethylene or PVC-U, Envirodrain® is

unaffected by corrosion in saline environments.

High capacity infiltration of water along the entire length of the pipe

is achieved by rows of drainage slots. These are punched into the

‘valleys’ of the corrugations as the pipe is extruded.

Envirodrain® can be provided with a filter ‘sock’ to minimise silt

built up, and is also available unslotted for use as a flexible drainage

system where intrusion by fine tree roots may cause obstruction.

Jumbo rolls are perfect for pipe plough installation for use in large

area projects as they are coiled with a 300mm centre for despooling.

dimEnSionS

Envirodrain® is manufactured to the dimensions specified in the Australian Standard AS 2439 Part 1, “Perforated Drainage Pipe and Associated Fittings” in sizes DN50, DN65, DN100 and DN160.

It is available in three stiffness classes which relate to its ability to withstand external loads:

SN4: for residential landscape drainage projects.

SN8: for landscape, road construction or civil engineering works not subjected to heavy vehicular traffic. Pipe to this stiffness is manufactured from polyethylene. This stiffness is also recommended for agricultural drainage projects.

SN20: for similar works where heavy vehicular traffic is involved. Pipe to this stiffness is manufactured from PVC-U. This stiffness is normally used in road construction, infrastructure and mining projects.

Table 1 – Product Codes & Dimensions

Product Code outside diameter (mm)

inside diameter (mm) Stiffness Water Entrance

area (mm2/m)coil Length

(m)

Slotted Envirodrain®

174005020 50 44 Sn8 2000 20

1740050200 50 44 Sn8 2000 200

174006520 65 55 Sn8 3900 20

1740065200 65 55 Sn8 3900 200

1740010020 100 86 Sn8 4300 20

1740010050 100 86 Sn8 4300 50

17400100100 100 86 Sn8 4300 100

161000100100 100 86 Sn20 4300 100

1640016040 160 138 Sn4 3100 40

Slotted & Socked Envirodrain®

194005020Std 50 44 Sn8 2000 20

1940050200Std 50 44 Sn8 2000 200

194006520Std 65 55 Sn8 3900 20

1940065200Std 65 55 Sn8 3900 200

1940010020Std 100 86 Sn8 4300 20

1940010050Std 100 86 Sn8 4300 50

19400100100Std 100 86 Sn8 4300 100

161000100100rta 100 86 Sn20 4300 100

1640016040rta 160 138 Sn4 3100 40

Unslotted Envirodrain®

184005020 50 44 Sn8 2000 20

184006520 65 55 Sn8 3900 20

1840010020 100 86 Sn8 4300 20

18400100100 100 86 Sn8 4300 100

161000100100un 100 86 Sn20 4300 100

1640016040un 160 138 Sn4 3100 40

*Other sized coils are available and can be made to order, subject to minimum order quantities

*STD = Standard Sock

*RTA = RTA Approved Polyester Sock

*UN = Unslotted

Product information

• Agriculturalandlandscapedrainage

• Rehabilitationofsaltaffectivesoils

• Swampdrainage

• Highwaysandbuildingplatformsub-grades

• Playingfieldsandgolfcourses

• Retainingwallpressurerelief

• Constructionsitesandbuildingbasements

• Damreliefwells

• Miningprocesses

Envirodrain® ApplicationsEnvirodrain® can be used for:

DESIgNThe table below provides an approximate guide for drain spacing relative to drain depth and soil type, for non-critical agricultural applications. Land utilisation considerations such as paddock area, crop or tree spacing and vehicular access must also be considered.

Drainage of deep permeable soils depends on the water flowing through the soil mass directly into the drainage pipe.

An envelope of granular aggregate around the pipe improves the flow of water into the pipe by increasing the effective diameter of the drain. In permeable soils water flows through the slots mainly at the sides and bottom of the pipe. It is therefore important that, where used, the gravel envelope should completely surround the pipe.

grADIENTGenerally recommended grades are shown in the table below:

Table 2 – Indicative Drain Spacing vs. Soil Type

Soil TypeEffective drainage distance each side of pipe (m) at a drain depth of:

Soil Permeability 0.6-0.9m 0.9-1.2m

Sand 15 to 22 23 to 45 medium/High

Sandy Loam 12 to 15 15 to 22 medium

Loam 10 to 14 12 to 15 medium/Low

clay Loam 6 to 9 7 to 10 Low

Sandy clay 5 to 6 6 to 7 very Low

clay 3.5 to 4.5 4.5 to 5.5 very Low

Table 3 – recommended gradients

Application Minimum gradient Preferred gradient

agricultural .2% or 1:500 .4% or 1:250

civil Engineering Projects .5% or 1:200 2% or 1:50

Sand .3% or 1:330 2% or 1:50

Associated with minimum gradient is minimum flushing velocity. The recommended minimum flushing velocities are:

1. Where clay particles or fine silts could enter the pipe – 0.2m/s

2. Where course silts or fine sands could enter the pipe – 0.5m/s

Porous material

Compacted granular material

Product information

FLow

Table 4 – Envirodrain® Perforation Area

Nominal Diameter Nominal open Area of Perforations

dn50 2000 mm/m

dn65 3900 mm/m

dn100 4300 mm/m

dn160 3100 mm/m

Table 5 – Maximum Flow rates for Envirodrain (Full Pipe)

gradient flow velocity dn50 dn65 dn100 dn160

1:500L/s 0.2 0.5 1.6 6.8

m/s 0.1 0.1 0.2 0.3

1:330L/s 0.3 0.6 2.0 8.4

m/s 0.1 0.2 0.3 0.4

1:250L/s 0.3 0.7 2.3 9.7

m/s 0.2 0.2 0.3 0.5

1:100L/s 0.5 1.1 3.6 15.3

m/s 0.3 0.3 0.5 0.8

1:50L/s 0.7 1.5 5.1 21.6

m/s 0.4 0.5 0.6 1.1

oPEN ArEA oF PErForATIoNS

Lateral Drain

Salty groundwater

Product information

UNSLoTTED ENvIroDrAIN®

Where the pipe passes through areas where fine tree root intrusion may cause obstruction, unslotted Envirodrain® can be used.

INSTALLATIoNThe long coil length of Envirodrain® combined with its lightweight and flexibility means it can be rapidly installed.

Envirodrain® should be installed at or above the impermeable clay layer as, water will migrate down along the impermeable layer to the lowest point. The cut-off drain should be installed across the slop and perpendicular to the groundwater movement. A drain could also be made from the low point to a soak pit or connected to the stormwater drainage system.

The drainage system must not be connected to the sewerage system. Envirodrain® should be placed in its trench on a graded bed of granular material, approximately 50mm deep. For 200mm either side of the pipe and to a distance of at least 150mm above it, it is recommended that permeable, reasonably compacted free flowing granular material, be used. This will provide the pipe the necessary haunch support and allow free drainage of groundwater. The maximum aggregate size recommended in this zone is 13mm. Impermeable clay or organic material such as straw, woodchips, sawdust etc., must not be used.

The remainder of the trench should be filled with a pervious fill, and well compacted to ensure there is no subsidence at the surface. Heavy clay is difficult to compact and may restrict the flow of soil water to the pipe.

FILTEr “SoCk”Under some conditions, fine sand or soil particles may flow into the pipe with the water and result in reduced flow in a pipe laid to a shallow gradient.

Under these conditions it may be advantageous to use a woven fabric filter “sock” to screen such particles. An additional benefit is that the filter sock can stretch over the corrugations of the Envirodrain®, increasing the effective water access area to the pipe.

Filter sock is supplied in two grades, Standard Polyester (which can be identified by the red stripe through the sock) and Heavy Duty Polyester RTA approved (which features a green stripe). The filter sock can be purchased fitted to the slotted pipe or separately. All coils supplied with filter sock are packaged in a protective bag.

Table 6 – Product Codes & Descriptions of Envirodrain® Filter Sock

Product Code Description

dcfS065 65/50mm Std filter Sock x 100m

dcfS100 100mm Std filter Sock x 100m

dcfS160 160mm Std filter Sock x 60m

dcfS065rta 65/50mm rta filter Sock x 100m

dcfS100rta 100mm rta filter Sock x 100m

dcfS160rta 160mm rta filter Sock x 60m

Typical installation for retaining wall drainage

Min. 150mm of free-draining material. i.e. scoria

Min. 75mm of filter material and adjust depth of filter material to get pipe gradient

waterproofing

Concrete Floor

envirodrain®

Product information

Envirodrain® encased in gravel and coarse sand envelope designed as a filter.

Envirostorm®

Envirostorm® is a flexible stormwater pipe used for temporary down pipes or dispersing of stormwater. It is manufactured from virgin UV resistant white polypropylene and available in 100mm diameter x 30m coils.

Product Code: 1800010030

Also AvAilAble

Table 7 – Minimum recommendation Depths of Cover (From AS/NZS 2566.1)

Loading Cover (mm)

no vehicle loading 300

infrequent vehicle loading 450

Sealed roadway 600

unsealed roadway 750

construction equipment loading 750

The maximum burial depth for Envirodrain® depends on the quality of the support the pipe receives from embedment.

Note: SN4 and SN8 Polyethylene Envirodrain® and Envirostorm® will float in water; therefore in wet conditions it is advisable to backfill the trench as the pipe is laid.

Typical drainage applications

Soil

Min. depth 100mm

envirodrain®Min. under pipe 75mm

gravel & Coarse Sand

ContaCt DetailsFor all enquiries and orders contact Iplex Pipelines

National Contact Centre: 13 18 40Civil: 13 10 86Fax: 13 18 60

Email: sales@iplexpipelines.com.au

www.iplex.com.au

Product information

Disclaimer: the information contained in this document should serve as a guide only and is subject to change without notice. iplex Pipelines australia Pty Ltd does not invite any person to act or rely upon such information and liability for such information is excluded. in particular, as new technology is developed rapidly, product specifications, designs and components may change and iplex Pipelines australia Pty Ltd reserves the right at its discretion to make changes as it see fit. the information contained in this document does not form part of the terms and conditions of sale or constitute the description of any goods to be supplied by iplex Pipelines australia Pty Ltd or its distributors. Before purchasing goods, customers should source current product information from their distributor or seek expert advice on their particular intended use and application for the product. no part of this document may be reproduced, stored in a retrieval system or transmitted in any form, electronic, mechanical recording or otherwise without the prior written consent of iplex Pipelines australia Pty Ltd. the designs, graphics, logos, tradenames, trademarks and other intellectual property contained in this document are either owned by iplex Pipelines australia Pty Ltd or used with the permission of the owner or licensee, and must not be used without prior written consent. copyright © 2012 iplex Pipelines australia Pty Ltd. all rights reserved. iPX/23 Jun2012

JoININgCoils of Envirodrain® are provided with a moulded coupler to allow them to be joined quickly and securely. A range of PE clip on fittings such as joiners, 45 degree junctions, tees, 4-way crosses, adaptors and couplers are available for Envirodrain®.

Table 8 – Product Codes & Descriptions of Envirodrain® Fittings

Product Code Description

dc0665 65mm End cap

dc19100 100mm tee

dc06100 100mm End cap

dc57100 100mm Joiner

dc36100 100mm 4-way crosses

dc2410045 100mm x 45° Junction

dc29610090 100mm x 90mm Envirodrain® to SW adaptor

dc07310065 100mm x 65mm reducer

Alternatively, a jointing collar can be made by cutting off a piece of Envirodrain®, approximately 250mm in length and slitting it on one side longitudinally. This collar can then be snapped over the two lengths of Envirodrain® to be joined and, if necessary, bound with light wire.

When joining socked Envirodrain®, pull back the sock and join pipe with socket. Pull one end of the sock over the joint one way and then the other end of the sock over the other way. Tie with string or cable tie to secure the sock over the pipe.

BENDINgEnvirodrain® can be curved to a radius as tight as three times the nominal diameter of the pipe. This flexibility minimises the requirement for separate fittings.