This Bristan Traditional Shower Valve Adjustable Pipe Centres - Adjustable Elbows Meaning this shower will replace Showers with 110mm centres 130mm centres 138mm centres as well as the industry standard 150mm...any anything inbetween. See below for further details on this Bristan Mini mixer. Bristan Regency Features Dual control Flow and temperature are controlled separately giving accurate control of both. Thermostatic cartridge maintains showering temperature to +/- 1oC by compensating for changes in the incoming water temperature and pressure providing a stable outlet temperature. Automatic shut off in the event of hot or cold water supply failure thus reducing the risk of injury. Factory set to a maximum of 43oC to eliminate the ability to select an unsafe temperature - this can.