摘要 |
<p>Plastic access pit for sewers etc. comprises a bottom section with unions for pipes, and a shaft section. Positioning devices are included to help keep it upright, typically comprising an upwards-sloping peripheral edge. The shaft section can be of polyvinyl chloride, with an elastic rubber edge at the top, while the bottom section can be of heat-hardened material, pref. glass-fibre-reinforced polyester.</p> |