6 canlyniad
Rhestrir y canlyniadau yn ôl perthnasedd.
Cymraeg: carthffosydd
Saesneg: sewers
Cymraeg: dŵr carthffosydd
Saesneg: sewerage effluent
Saesneg: Water Industry (Schemes for Adoption of Private Sewers) Regulations 2011
Cymraeg: carthffos gyfun
Saesneg: combined sewer
Cymraeg: cytundeb adeiladu dros garthffosydd
Saesneg: build-over agreement
Saesneg: Review of Private Sewers and Drains in England and Wales