Plasticized steel lid. GAS threaded PVC plug.
Polyester closed legs. Check anchorage system
Top polyester diffuser with PVC pipes
Polypropylene distribution with PVC pipes. Distribution according to requirements / media (Sand, active carbon, etc...)
Polyester casted GAS threads and flanges. Check for other standards (ANSI, JIS ...)
Polyester casted elliptical manhole. Internal pressure locking. Manhole orientation according to needs
Steel lifting device