TGD G 2011 – 2.13 – Sanitary Conveniences and Washing Facilities, Design and Installation

2.13 A water closet should discharge through a trap and branch pipe into a discharge stack or a foul drain. No part of the water closet pan should be connected to any pipe other than a flush pipe or branch pipe. See Technical Guidance Document H for guidance regarding drainage

C:BCARTGDTGD gTGD%20G%202008TGD%20G%202008%20-%20SECTION%202.13.pdf