A close-coupled toilet has the cistern fitted directly onto the back of the WC pan, forming a single visual unit without exposed pipework between the two. This is now the most common configuration in UK domestic bathrooms because it is compact, easy to clean and quick to install. The cistern feeds the pan through a short internal flush pipe, with the connection sealed using a rubber doughnut washer. UK products follow BS EN 14055 for cisterns and BS EN 997 for pans, with flush volumes limited by Building Regulations Part G. Replacement of close-coupled toilets requires careful handling of the porcelain, secure fixing to the floor and a tight seal at the pan connector. Many older London properties are upgraded to close-coupled designs during bathroom refurbishment.
Close-coupled toilet
Toilet with the cistern bolted directly onto the back of the WC pan.
