Installation is easy and can be done quickly.
The "Pre-Hole" is a precast concrete assembly manhole for sewage systems, registered under the Class I standard (JSWAS A-11) of the Japan Sewage Works Association, utilizing an impregnation adhesive method (elastic adhesive). By employing the impregnation adhesive method with elastic adhesive, it holds the components through adhesive and shear strength, while the adhesive's properties of watertightness and toughness at the joints enhance seismic resistance, making it an economical manhole. Please feel free to contact us if you have any inquiries. 【Features】 ■ The main body is made of concrete that is forcibly compacted using centrifugal or roller compaction methods, resulting in high-strength, high-water-tight components. ■ The joints of each component utilize the impregnation adhesive method with elastic adhesive, eliminating the need for sealing rubber, gaskets, or fastening hardware. ■ The performance of the components has been verified through various tests, allowing for the creation of an ideal manhole with no misalignment or leakage at the joints. *For more details, please download the PDF or feel free to contact us.
Inquire About This Product
basic information
【Other Features】 ■ The use of elastic adhesive improves seismic resistance due to its basic strength performance when used in combination, and its deformation performance that absorbs energy during earthquakes. ■ Compared to cast-in-place manholes, it has a smaller excavation profile, making installation simple and quick, thus economical. ■ Since the entire circumference is uniformly bonded, there is no directional strength at the joints, allowing for pipe installation at the joints. ■ The installation of the no-brace step also uses an immersion adhesive method, ensuring complete fixation of the component, with a wide step width of 400mm, allowing for safe ascent and descent. *For more details, please download the PDF or feel free to contact us.
Price range
Delivery Time
Applications/Examples of results
For more details, please download the PDF or feel free to contact us.
catalog（1）
Download All Catalogs
Company information
Our company manufactures Hume pipes and heavy-duty pipes, as well as pre-holes (assembled manholes) and concrete secondary products for manufacturing and sales. Additionally, we engage in trusted corporate activities based on the technology and achievements we have cultivated over many years, and we continuously promote research and development to aim for further improvement and contribute to the community. Please feel free to contact us if you have any requests.