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BlackMax SN8 polypropylene pipe for stormwater drainage – all sizes (225mm to 1200mm)

BlackMax SN8 Corrugated Polypropylene Pipe

SN8 twin-wall polypropylene stormwater pipe (AS/NZS 5065) for gravity drainage in civil and infrastructure projects.

  • High-strength, lightweight pipe with corrugated outer wall
  • Smooth bore for efficient flow and reduced blockages
  • Spigot/socket ends with rubber ring joint for fast install
  • Available in DN 225–1200mm, 6m effective lengths
  • Ideal for roads, rail, subdivisions, landfills and detention
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Description

BlackMax Corrugated Polypropylene Pipe is a twin-wall structured pipe system engineered for gravity stormwater and drainage infrastructure. Designed with a smooth internal bore and corrugated external wall, it offers high flow capacity, lightweight handling, and superior resistance to corrosion, abrasion and chemical attack — making it an ideal alternative to reinforced concrete pipe (RCP) for civil, road and infrastructure drainage.

Manufactured from high-strength polypropylene to AS/NZS 5065 and rated SN8, BlackMax is widely used in subdivisions, roads, rail, airports, industrial estates and landfill projects. Its long 6m effective length reduces jointing time on site, while its durable twin-wall profile delivers excellent stiffness and impact strength in harsh ground conditions.

In simple terms: a strong, lightweight pipe that carries stormwater underground — smooth inside for flow, tough outside for strength.

Key features & benefits

  • High flow efficiency: Smooth internal bore reduces blockages and promotes self-cleaning flow.
  • Lightweight & install friendly: Can be cut and handled without lifting machinery — speeds up siteworks.
  • Resilient in ground: Twin-wall structure resists crushing, cracking and aggressive soil conditions.
  • SN8 stiffness rating: Suitable for most non-pressure civil drainage installations under road and pavement.
  • Watertight joints: Rubber ring seal reduces infiltration and root intrusion into stormwater systems.

Applications

  • Stormwater and road drainage in residential subdivisions, highway works and local council infrastructure.
  • Rail corridors, airports and industrial sites where fast installation and structural integrity are essential.
  • Landfill leachate, detention systems and general gravity flow applications needing corrosion resistance.
  • Trenchless or relining installs where flexibility and joint reliability are important.

Specifications

  • Sizes available: DN 225 to DN 1200
  • Pipe stiffness: SN8 minimum (tested to AS/NZS 5065)
  • Material: High-density polypropylene (PP)
  • Wall profile: Twin-wall — smooth bore, corrugated external
  • Effective length: 6,000mm
  • Jointing: Spigot/socket ends with integral rubber ring

Note: BlackMax bends, junctions, end caps and reducers are available separately. Confirm local authority requirements for cover depths and trenching methods prior to install.

Material & performance

  • Polypropylene build: Resistant to corrosion, abrasion and aggressive soils.
  • Colour-coded: Black exterior with yellow interior for stormwater use (AS/NZS standard).
  • Chemical resistance: Performs well in acidic, alkaline and high-sulphate environments.

Design & compliance

  • Standards: Complies with AS/NZS 5065 for structured-wall drainage systems.
  • Hydraulic class: Smooth bore ensures low friction losses (Manning’s n = 0.010).
  • Cover depths: Design for shallow or deep installs — contact your engineer or council for approved limits.
  • Trenching notes: Requires side support, bedding and backfill to suit project class and soil conditions.

Handling & storage

  • Freight friendly: 6m lengths reduce joints, saving time and freight cost.
  • Site handling: Lightweight for manual positioning (smaller sizes); mechanical lifting needed for DN ≥600mm.
  • Storage advice: Store on flat, stable surface. Stack by size and keep out of direct UV if stored long term.

General installation notes

  • Join using the rubber ring seal supplied with the socketed end.
  • Ensure clean, chamfered cuts if trimming on site.
  • Use bedding and backfill material per engineer or council specification.

See the Dimensions tab for available diameters and indicative weights, and FAQs for lead times, approvals and site use.

Request a quote

Dimensions

Product Code Nominal Size (DN) Mean OD (mm) Mean ID (mm) Socket OD (mm) Witness Mark Length (mm) Profile Pitch (mm) Barrel Mass (kg/m) Effective Length (mm)
BLKMAX225 225 259 225 305 135 25 4 6000
BLKMAX300 300 344 300 403 147 33 6 6000
BLKMAX375 375 428 373 502 176 40 9 6000
BLKMAX450 450 514 447 603 222 50 13 6000
BLKMAX525 525 600 522 704 254 57 15 6000
BLKMAX600 600 682 596 750 286 61 21 5910
BLKMAX750 750 843 736 896 319 80 29 6000
BLKMAX900 900 1010 877 1072 398 100 60 6000
BLKMAX1000 1000 1103 987 1187 TBC TBC TBC TBC
BLKMAX1200 1200 1342 1170 1432 476 133 73 5950

FAQs

What is BlackMax pipe used for?

It’s a gravity drainage pipe suitable for stormwater applications including civil, commercial, road, rail and infrastructure projects.

What sizes are available?

Standard sizes include 225mm, 300mm, 375mm, 450mm, 525mm, 600mm, 750mm, 900mm, 1000mm, and 1200mm diameters in 6m effective lengths.

Is it compliant with Australian standards?

Yes — complies with AS/NZS 5065 for structured wall gravity drains and sewers.

What’s the stiffness class of BlackMax?

SN8 minimum stiffness — suitable for heavy-duty buried installations, including roads and infrastructure.

Can BlackMax be installed above ground?

Yes — if adequately supported along its length and at socket joints. Not recommended for long-term UV exposure without cladding or shielding.

Is it suitable for sewer lines?

No — this product is not pressure-rated and is typically not used for gravity sewer lines unless approved by design authority.

What does the yellow inner liner do?

The yellow interior allows easier visual inspection during install and commissioning.

How long will BlackMax pipe last?

Expected design life exceeds 100 years when installed and maintained in accordance with AS/NZS 2566.1 and the engineer’s specification.

How deep can it be buried?

Suitable for burial depths from 2m to 10m. Full structural assessment to AS/NZS 2566.1 should be conducted for deep cover or high-traffic loads.

Can it be used under roads or highways?

Yes — 600mm minimum cover required under sealed roads, 750mm under unsealed. Confirm with authority or engineering design.

Is it ribbed inside?

No — the inner bore is smooth for high hydraulic efficiency.

How are pipes joined?

Spigot and socket joint with rubber ring seal. Designed for fast on-site assembly.

Can the pipe be cut on site?

Yes — use a fine-tooth saw. Always chamfer and clean cut ends before installation.

What fittings are available?

Matching bends, tees, junctions, couplings, reducers, plugs and adaptors are available separately.

Can I use water jetting or root cutters?

Yes — appropriate jetting methods are supported. Always consult POP205 and follow relevant installation guides.

How are pipes connected to pits or headwalls?

Pipes can be cast directly into concrete pits or manholes. Check project-specific install drawings for detailing.

Is BlackMax chemically resistant?

Yes — polypropylene resists most acids, bases, sulphates and aggressive soils.

Where is BlackMax manufactured?

Produced in Australia using high-strength polypropylene to meet local authority and infrastructure project standards.

What’s the delivery method?

Delivery by truck to be forklift unloaded. Crane available on request.

Can you help quote large quantities?

Yes — submit your take-off, quantities or project specs through our quote form and we’ll assist.