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Seven Star Infrastructure
Stormwater Pipes & Headwalls

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Australian-made portable and modular building solutions. Browse by category below.

Stormwater Pipes & Headwalls

Australian-made HDPE stormwater pipes from DN225 to DN1050, with matching headwalls, culvert kits, rubber seals and jointing lubricant for residential and commercial drainage.

High-performance HDPE stormwater pipe designed for gravity-fed applications including stormwater systems, sewer mains, culverts, retention systems, and water transfer.

Manufactured from 100% recycled and recyclable polyethylene with an expected lifespan well in excess of 50 years. Meets SN8 stiffness classification (AS/NZS 5065) and features an effective rubber ring joint system for leak-free installation.

Our range comes in two grades: A-Grade pipes include joining flanges, rubber seal rings and jointing lubricant, while factory seconds offer a cost-effective alternative for many applications. Round single headwalls, rubber seals and lubricant are stocked to suit, and twin headwalls and culvert kits are available on request.

HDPE stormwater pipe

HDPE Stormwater Pipes — Sizes & Pricing

Nominal 6m lengths, SN8 stiffness (8,000 N/m/m) to AS/NZS 5065.

ITEM CODEOUTSIDE DIM. mm (NOMINAL)INTERNAL DIA. mm (NOMINAL)EFFECTIVE LENGTH (m)LENGTH (m) (with flange)SECONDS Priced From (AUD $)A-GRADE Priced From (AUD $)
DN2252542166.286.3$145$185
DN3003452926.186.3$250$299
DN3754243616.186.3$360$435
DN4505064326.126.3$540$625
DN5256035156.036.3$685$835
DN6006895845.906.3$820$1,185
DN7508497235.916.3$1,275$1,780
DN90010168645.916.3$1,750$2,250
DN1050118610085.976.3$2,250$3,250

NOTE: Rubber rings & lubricant are not included with factory seconds. Some seconds are also missing joining flanges — please discuss your requirements with our team. Seals and lubricant can be purchased separately (see pricing below).

Headwalls & Culvert Kits

Round single headwall

Our 3D-printed headwalls are manufactured from ABS (acrylonitrile butadiene styrene), a thermoplastic polymer known for its durability and impact and heat resistance.

Paired with our HDPE stormwater pipes they are a cost-effective solution for your drainage requirements, saving on transport and handling compared with precast concrete.

Twin headwalls and culvert kits are also available on request — ask our sales team for more information and pricing.

Round single headwall fitted to an HDPE stormwater pipe
HEADWALL (ROUND SINGLE)UNITPRICE (AUD inc. GST)
225mmeach$440.00
300mmeach$450.00
375mmeach$515.00
450mmeach$535.00

Twin headwalls and culvert kits also available — POA.

Rubber Seals & Lubricant

A-Grade pipes have rubber seals & lubricant included.

Rubber seal rings and jointing lubricant are included with our A-Grade pipes. For factory seconds they can be purchased separately at the prices below.

Vinidex BK bactericidal pipe jointing lubricant is the suggested approved product. It has been specifically formulated for jointing pipes that use rubber ring joints, and has been tested over three years both mechanically and chemically at the request of the Australian water industry.

BK Bactericidal Pipe Jointing Lubricant
ITEMUNITPRICE (AUD inc. GST)
Lubricant500g$17.50
Lubricant1kg$25.00
RSC0225 Rubber Sealeach$15.00
RSC0300 Rubber Sealeach$20.00
RSC0375 Rubber Sealeach$27.50
RSC0450 Rubber Sealeach$35.00
RSC0525 Rubber Sealeach$70.00
RSC0600 Rubber Sealeach$75.00
RSC0750 Rubber Sealeach$132.00
RSC0900 Rubber Sealeach$150.00
RSC01050 Rubber Sealeach$195.00

All prices in AUD, include GST and are for the Sydney Region. Pricing current as at August 2026 and may change without notice. Images are for illustration purposes only and may not resemble the actual product.

Lubricant Usage

Please add 10% to the below to allow for fittings

Unit QtyDN225
No. of
Joints
DN300
No. of
Joints
DN375
No. of
Joints
DN450
No. of
Joints
DN525
No. of
Joints
DN600
No. of
Joints
DN750
No. of
Joints
DN900
No. of
Joints
DN1050
No. of
Joints
500 g1396554332
1 kg2718121098664
4 kg105744740363224246

Technical Specifications

HDPE stormwater pipe spigot and socket joint
  • Material: HDPE Polyethylene (100% recycled)
  • DN (Nominal Diameter): 900mm
  • Nominal OD: 1016mm
  • Min. Mean Inside Diameter: 864mm
  • Effective Length: 5.91m
  • Actual Length (with flange): 6.3m
  • Approximate Pipe Mass: 44 kg/m
  • Approximate Pipe Weight: 260.04 kg
  • Stiffness: SN8 — 8,000 N/m/m
  • Standard: AS/NZS 5065
  • Joint System: Rubber ring (leak-free)
  • Expected Lifespan: 50+ years

Common Questions

A-Grade pipes are our highest-quality pipes and come complete with flanges, rubber rings, and lubricant.

Second-grade pipes offer a more economical alternative. They may have cosmetic blemishes or minor manufacturing imperfections but are still suitable for many applications. As our stock of seconds varies, some pipes include flanges and some do not. Rubber ring and lubricant are sold separately.

Flanges

All A-Grade pipes are supplied with flanges.

Some second-grade pipes include flanges, while others do not. If you require flanges, please let us know when enquiring and we will do our best to provide a suitable option from our available stock.

Rubber Rings & Lubricant

All A-Grade pipes are supplied with rubber rings and lubricant for joining.

For second-grade pipes, rubber rings and lubricant are available for purchase separately — see the Rubber Seals & Lubricant pricing above.

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