How to choose your showerLow pressureThis is a common type of heating system. To create the shower pressure, waterflows directly from a cold water tank (cistern) in your loft to a hot water tank (cylinder) in your airing cupboard. The greater the distance from the bottom of thetank to the top of the showerhead, the better your shower will perform. Typicallythis system has a water pressure of 0.1 bar* 1 metreminimumHigh pressureA combi-boiler heats your water up as soon as you turn the shower or hot tap on.It's often located in the kitchen and supplies water at high pressure. Usually this system has a water pressure of between 1 bar* and 5 bar.High pressureThis system stores hot water under pressure in a large cylinder, which is usuallyfound in an airing cupboard or garage. You can identify it by the expansion vesselon top of the cylinder and the absence of a cold water tank. Sometimes, in a refurbished property, an unused cold water tank can be left in place. Usually thissystem has a water pressure of between 1 bar* and 5 bar.SafetyHigh pressureEssentially a gravity fed system, but with the addition of a booster pump, water isdelivered to your shower at high pressure for better performance. The water pressure will depend on the pump, but in most cases this will be between 1 bar*and 3 bar. You may need to increase the capacity of your hot and cold watertanks when a pump is fitted.1m minWe've made the process easy for you. Just follow these four simple steps.* 1 bar is equivalent to 10 metres height between the bottom of a cold water tank and the top of the showerheadStep 1: Identify your water systemThere are four possible ways the water in your home is heated and circulated.

23Thermostatic Mixer ShowerMaintains a constant temperature irrespective of hot or coldwater flow, rate, pressure or temperature. No need to continuously adjust the temperature setting. The safest typeof shower.Venturi Mixer ShowerA solution to poor flow rate on low pressure gravity systems.Uses high pressure mains to pull low pressure hot waterthrough the shower valve giving a much higher flow rate thanan electric shower.Manual Mixer ShowerRelies on adequate temperature control being provided bythe hot water system, does not compensate for variations inhot and cold water flow rate, pressure or temperature.ThermostaticVenturiManualTT OpostaTT Ascari TT RivageTT MomentsTT SilverTT AttitudeTT Jasper MorrisonTT ActiveActive ExposedTrevi Outline Trevi Therm Trevi TraditionCTV Ceratherm 200Ceratherm 100ITVAlto EcothermBoostMoments ManualBlendCeraplanLow pressure gravityCombination boilerUnvented mains pressurePumped gravity fedMixer typeHot water systemStep 2: Select your preferred shower typeThere are three types, each giving a different showering experience. The table shows which of our showers valves are suitable for your system.