When designing, commissioning and servicsing piping systems for acquisition in the Section 104 agreements, developers and their selected designers have opened up a multitude of product and material options and must take into account a number of considerations. There are strict rules for getting a deal that can be a minefield for developers. The process is often on the critical path of a project and the decisions related to it can have a huge impact on costs. In Wales, mandatory building standards provide that an agreement must be concluded in accordance with Section 104 before a development can proceed. As this legislation is likely to be implemented in England, it is important that all stakeholders in housing projects understand the process.