This appraisal is for a range of Class D composite access covers and frames for sewer applications .
The covers and frames are manufactured from a glass fibre reinforced polymer mixture of polyester, vinyl ester and polyurethane.
The products are:
- DN 600 Class D circular, bolted, sealed access cover.
- DN 900 Class D circular, bolted, sealed access cover.
900mm x 600mm Class D rectangular, bolted, sealed access cover.