This European Standard specifies the definitions and requirements for ancillary fittings of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP), and polyethylene (PE) intended to be used in non-pressure underground drainage and sewerage systems, conforming to EN 476:
a) outside the building structure (application area code " U" ), reflected in the marking of products by " U" , and
b) both buried in ground within the building structure (application area code " D" ) and outside the building structure (application area code " U" ), reflected in the marking of products by " UD" .
It also specifies the test parameters for the test methods referred in this standard.
The ancillary fittings covered by this standard are the following:
- sealed access fittings
- rodding point covers
- rodding tees
- mechanical saddles
- inspection chambers for shallow non-roadway applications to a maximum depth of 1,25 m.
NOTE 1 Inspection chambers as defined in 6.1.3 of EN 476:1997 have a riser with a DN/ ID less than 800 mm.
NOTE 2 Deep inspection chambers and manholes for application area U are specified in Part 2 of this standard.
The fittings can be manufactured by various methods e.g. injection moulding, rotational moulding, spiral winding or fabricated from components made to other standards.
The jointing can be with:
- elastomeric ring seal joint
- cemented joint for PVC-U
- welded joint for PP and PE.
NOTE 3 Pipes, fittings and other components conforming to any of the plastics products standards listed in Clause 2 can be used with ancillary fittings conforming to this standard, provided they conform to the requirements for joint dimensions given in Clause 6 and to the requirements of Table 5.