MANHOLES ACCORDING TO CUSTOMER DESIGN
Manholes obtained from pipes manufactured by Polieco are composed of Ecopal corrugated pipes or smooth polyethylene pipes suitably cut and welded.
Manholes can be made with a channelled base if a pipe runs through it, or with a flat base if it does not. In the first case, fins are inserted inside the manhole consisting of polyethylene sheets inclined at 8° with respect to the horizontal plane. The base of the manhole consists of a polyethylene sheet of a suitable thickness welded to the inside wall of the manhole.
In the case of custom-made manholes, no restrictions are imposed on the diameter of inlet/outlet pipes and manholes of any type may be constructed according to designer’s requirements (e.g. L-shaped manholes, jump manholes, or manholes with multiple inlets).
Ends of manholes with ND/OD 800 – 1000 – 1200 risers can be created using a PEMD tapered adapter, obtained by rotomoulding and coupled onto the extension, which is used to reduce manholes up to a crawl space diameter of 600 mm.
A ladder, consisting of polyethylene uprights and polyethylene-coated steel steps, may also be welded onto the inside wall of ND/OD 1000 – 1200 risers. The manhole pipe is used in non-pressurised underground sewerage systems.
To find out all the information on the manholes created from pipes manufactured by Polieco, see the technical data sheet and the specification.