The Bristan prism recessed thermostatic dual control shower valve with integral two outlet diverter and stopcock chrome This thermostatic recessed dual control valve incorporates a diverter that diverts the water flow between shower heads, body jets or a bath filler. The Prism Thermostatic Recessed Dual Control Shower Valve is suitable for all plumbing systems, requiring an operating pressure between 0.2 bar and 5.0 bar and comes with dual controls that regulate the temperature and flow separately.