Type 1 Maintenance Shafts
Our Sewer Type 1 Manholes are designed and manufactured to meet the rigorous standards set by the Water Corporation of Western Australia. Commonly used across sewer reticulation networks, these precast concrete structures are engineered for strength, durability, and ease of installation in a wide range of ground conditions.
Type 1 Manholes are typically used for pipe diameters up to DN600 and are available in various depths and configurations to suit project-specific requirements. Each unit is manufactured to ensure watertight performance, long-term structural integrity, and compatibility with Water Corporation specifications and civil design standards.
Whether for new developments or sewer network upgrades, our Type 1 Manholes offer a high-quality, compliant solution that supports safe access, inspection, and maintenance across wastewater infrastructure.
Products
Bases
| Item no. | Description | Weight (kg) |
| S01 | Sewer Manhole Base – Blank | 840 |
| S02 | Sewer Manhole Base – Benched | 1,200 |
Covers
| Item no. | Description | Weight (kg) |
| S11 | 2pt Class D Solid Top C/Iron Sewer Cover – Flush | 630 |
| S12 | 2pt Class D Infill C/Iron Sewer Cover – R25 | 662 |
| S13 | 2pt Class D Infill C/Iron Sewer Cover – R100 | 748 |
| S30F | 600 dia. Class D Sewer Cover – enc. 1200x200mm – Flush | 475 |
| S30R25 | 600 dia. Class D Sewer Cover – enc. 1200x200mm – R25 | 475 |
| S30 | 600 dia. Class D Sewer Cover – enc. 1200x200mm – R100 | 475 |
Liners
| Item no. | Description | Weight (kg) |
| LS01 | 1066 Dia x 300 Sewer Liner – No Steps | 173 |
| LS02 | 1066 Dia x 600 Sewer Liner – No Steps | 352 |
| LS03 | 1066 Dia x 900 Sewer Liner – No Steps | 528 |
| LS04 | 1066 Dia x 1200 Sewer Liner – No Steps | 705 |
| LS05 | 1066 Dia x 1500 Sewer Liner – No Steps | 878 |
| LS06 | 1066 Dia x 1800 Sewer Liner – No Steps | 1,057 |
| LS07 | 1066 Dia x 2100 Sewer Liner – No Steps | 1,231 |
| LS11 | 1066 Dia x 300 Sewer Liner – With Staging Bars Installed | 173 |
| LS12 | 1066 Dia x 600 Sewer Liner – With Staging Bars Installed | 352 |
| LS13 | 1066 Dia x 900 Sewer Liner – With Staging Bars Installed | 528 |
| LS14 | 1066 Dia x 1200 Sewer Liner – With Staging Bars Installed | 705 |
| LS15 | 1066 Dia x 1500 Sewer Liner – With Staging Bars Installed | 878 |
| LS16 | 1066 Dia x 1800 Sewer Liner – With Staging Bars Installed | 1,057 |
| LS17 | 1066 Dia x 2100 Sewer Liner – With Staging Bars Installed | 1,231 |
Accessories
| Item no. | Description | Weight (kg) |
| S04 | Sewer Conversion Slab – Suit 1066 Humes Liner | 540 |
| S05-100 | Rectangular Spacer 1430x1070x100mm (Suit 2pt 900×600) | 222 |
| S05-150 | Rectangular Spacer 1430x1070x150mm (Suit 2pt 900×600) | 331 |
| S31 | Butyl Mastic Tape | |
| S32 | Mastic Primer | |
| S33 | 150mm Rubber Ring | |
| S34 | 225mm Rubber Ring | |
| S35 | 100mm Rubber Ring |
Encased Bends
| Item no. | Description | Weight (kg) |
| S16 | Encased 100mm 90 deg. Bend | 29 |
| S17 | Encased 150mm 90 deg. Bend | 86 |
| S18 | Encased IS 150mm 90 deg. Bend | 220 |
| S19 | Encased Boundary Trap “P” Type 100mm PVC | 28 |
| S20 | 450x450x35mm Concrete IS Slab | 18 |
| S20P8L | P8 Sewer Junction 150x100x60° Encased – Left | 184 |
| S20P8R | P8 Sewer Junction 150x100x60° Encased – Right | 184 |
| S225P8L | P8 Sewer Junction 225x100x60° Encased – Left | 650 |
| S225P8L-150 | P8 Sewer Junction 225x150x60° Encased – Left | 650 |
| S225P8R | P8 Sewer Junction 225x100x60° Encased – Right | 650 |
| S225P8R-150 | P8 Sewer Junction 225x150x60° Encased – Right | 650 |
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Case Studies
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