Why do some overseas taps have fixed valves?
This is a matter for the local authorities and regulations but a fixed valve cannot provide the additional safety of the check valve function which a loose jumper valve provides. Loose jumper valves are by far the preferable type to use and often there is little difference in cost. The European Union is now looking into the question of check valve function with a view to making this compulsory. Fixed valves are not permitted on potable water supplies in Australia. Fixed valves cannot cause water hammer and this is probably the main reason they have been used in some other countries but there are better methods of controlling water hammer while retaining the benefits of a loose jumper valve. refer to the DynaValve features.
