Are there any Building Regulations governing the ventilation of soil pipes?

Yes. Local authorities require that all such implements are properly ventilated. In addition, it is not permitted to make use of either of the following:

	an existing or proposed pipe designed to carry rain water from a roof, and drainage from a sanitary convenience;

	 an existing pipe designed to carry surface water from a premises to act as a ventilating shaft to a drain or a sewer conveying foul water.