No - There is no difference.
An Approved Contractor is a type of competent person defined in the Water Supply (Water Fittings) Regulations and Scottish Water Byelaws. These are more formally known as Approved Contractor Persons.
Including WIAPS, there are seven Approved Contractor Persons’ Schemes operating across the UK and for ease of recognition for consumers they are often referred to as Approved Plumbers. All seven UK schemes are essentially the same as they have the same entrance criteria and are recognised by all of the UK water suppliers.
