Envirodrain®  Strong  Flexible & Lightweight  Easy to Install  Corrosion resistant  Economical

The 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 Outside Diameter (mm)

Inside Diameter (mm)

Stiffness

Water Entrance Area (mm2/m)

Coil Length (m)

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

160

138

SN4

3100

40

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

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

Product Code Slotted Envirodrain®

1640016040 Slotted & Socked Envirodrain

®

Unslotted Envirodrain®

*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 Envirodrain® Applications Envirodrain® can be used for: • Agricultural and landscape drainage

• Retaining wall pressure relief

• Rehabilitation of salt affective soils

• Construction sites and building basements

• Swamp drainage

• Dam relief wells

• Highways and building platform sub-grades

• Mining processes

• Playing fields and golf courses

Porous material

Design The 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.

Compacted granular material

Table 2 – Indicative Drain Spacing vs. Soil Type

Soil Type

Effective 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

3.5 to 4.5

4.5 to 5.5

Very Low

Clay

Gradient Generally recommended grades are shown in the table below: 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

Product information 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

Lateral Drain

Open area of perforations

Salty Groundwater

Flow Table 5 – Maximum Flow Rates for Envirodrain (Full Pipe) Gradient

1:500

1:330

1:250

1:100

1:50

Flow Velocity

DN50

DN65

DN100

DN160

L/s

0.2

0.5

1.6

6.8

m/s

0.1

0.1

0.2

0.3

L/s

0.3

0.6

2.0

8.4

m/s

0.1

0.2

0.3

0.4

L/s

0.3

0.7

2.3

9.7

m/s

0.2

0.2

0.3

0.5

L/s

0.5

1.1

3.6

15.3

m/s

0.3

0.3

0.5

0.8

L/s

0.7

1.5

5.1

21.6

m/s

0.4

0.5

0.6

1.1

Product information 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

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

Installation The 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. Typical installation for retaining wall drainage

Min. 150mm of free-draining material. i.e. scoria Waterproofing Min. 75mm of filter material and adjust depth of filter material to get pipe gradient Envirodrain®

Concrete Floor

Product information Typical drainage applications Envirodrain® encased in gravel and coarse sand envelope designed as a filter.

Soil

Min. depth 100mm

Gravel & Coarse Sand

Min. under pipe 75mm

Envirodrain®

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.

Also Available

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

Product information Joining Coils 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.

Bending Envirodrain® 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. 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

Contact Details For all enquiries and orders contact Iplex Pipelines National Contact Centre: 13 18 40 Civil: 13 10 86 Fax: 13 18 60 Email: [email protected]

www.iplex.com.au