RAH were asked by a leading Swedish taps and valves manufacturer to collaborate with them in attaining UK water industry approvals, particularly in relation to TMVs. To ensure that the valves can be approved by the certification body, test rigs at both the test house and the manufacturer must be the same.RAH consultants traveled to Sweden and audited Mattsson's test facilities and procedures. It was evident that despite the high standards of the company's testing facility and staff, the interpretation of procedures was significantly different between the two test houses. Clarification by our staff resulted in significant changes to the procedures in Sweden.RAH then advised on, and conducted round robin tests between the two laboratories and found that the results matched. Mattsson were then able to confidently go forward with their designs aware that the results of future testing would be consistent between both test facilities