Suitable construction details and details of connections (including flow control devices) to watercourses, sewers, public surface water sewers, highway drains and drainage systems.
Manylion adeiladu addas a manylion cysylltiadau (gan gynnwys dyfeisiau rheoli llif) i gyrsiau dŵr, carthffosydd, carthffosydd dŵr wyneb cyhoeddus, draeniau priffyrdd a systemau draenio.