chapter
Unsealing of Traps Causes and Prevention
CI/SfB52 BUILDING REGULATIONS
Pages 5

Water Seals in Traps. Part H of Schedule 1 to the Building Regulations 1985 states that any system which carries foul water from appliances within the building to a foul water outfall shall be adequate. “Acceptable Level of Performance” is referred to in the Approved Document H1…systems should prevent foul air from the drainage system from entering the building under working conditions.