Shower Features Explained
We want to keep things as clear as possible and we therefore hope you find the following useful.
Temperature Stabilised Electric Showers
The water temperature from an electric shower may fluctuate if the water flow to the shower is reduced due to an increase in demand for water from elsewhere in the house, such as when someone flushes a toilet or turns on a tap.
Temperature stabilised electric showers help control the water temperature from the shower and reduce the likelihood of these fluctuations, but cannot guarantee an absolutely constant temperature. If you require a guaranteed constant temperature then you should think about a thermostatic electric shower.
Thermostatic Electric Showers
A thermostatic electric shower reacts to changes in the shower supply conditions to ensure the water from the shower remains constant.
Unlike other models available on the market, Triton thermostatic electric showers maintain the water temperature from the shower to within 2oC of the chosen setting on the shower controls. They can do this, not only when the water pressure to the shower changes (due to an increase in demand for water from elsewhere in the house, such as a toilet or tap) , but also when the incoming temperature of your cold water or electric supply voltage changes.
Power Rating (Electric Showers)
The flow rate obtained from an electric shower depends on its kilowatt rating (kW). Basically the higher the kW rating the greater the flow of heated water from the shower head.
If you are thinking of upgrading your shower, you will need to check out a few things before choosing a higher kW rating, as different supply conditions are required for different kW ratings. You will need to check the water pressure and flow rate, the rating of the miniature circuit breaker or fuse in your consumer unit, and the size of electric cable running to your shower.
For more information take a look at our "Kilowatt ratings explained" video
Phased Shutdown (Electric Showers)
An electric shower with phased shutdown will continue to run for a few seconds after the unit has been turned off, so any remaining hot water can be cleared out of the shower. This helps reduce the build up of limescale in the heater can and showerhead (which is good news for those who live in hard water areas) and ensures a cool start every time the shower is turned on.
Low Pressure Indicator (Electric Showers)
For an electric shower to operate a minimum water pressure to the shower is required. The pressure required depends on the model and its kilowatt rating.
A low pressure indicator, which can be mechanical or a light, will operate when there is a lack of water pressure coming into shower.
The British Electrotechnical Approvals Board.
A unit of measurement of water pressure approximately equivalent to a column of water 10m high or 14.5 lbf/in (or 100 kPa) per bar.
Wall mounted sprays usually installed in multiples.
A valve installed where the body is recessed in the wall.
Cold Water Storage Cistern
Fixed container for holding water at atmospheric pressure usually used for providing a feed to a vented domestic hot water cylinder. It can also be used to provide a vented cold supply to terminal fittings.
A fitting used to control the direction of water to various outlets
Double Pole Switch
An electrical switching device in which the continuity of both the mains live and neutral is broken upon the action of the switch giving a contact separation of at least 3mm. The earth always remains connected.
A component used in an instantaneous electric shower to heat the water.
A shower that is mounted onto the finished wall surface and is not recessed into the wall.
Fixed Shower Head
An over head fixed height shower head.
The volume of water moving through a given point, normally expressed in litres per minute, gallons per hour or metres cubed.
A device with moving parts which responds to variable inlet pressures to control flow at a reasonably constant rate. These are subdivided into two types: (a) Fixed - manufactured in a range of predetermined flow rate settings. (b) Variable - manually adjustable to provide different flow rate settings.
A shower head attached to a flexible shower hose also termed a shower handset.
Hot Water Cylinder
Means a cylindrical closed vessel capable of containing water under pressure greater than atmospheric.
The internal part of the pump that is driven by the motor, and is used to pressurise the water.
Instantaneous Electric Shower
A shower that electrically heats the water whilst the water is passing through it.
Integrated Power Showers
An all in one power shower features a pump and integrated shower control and requires a low pressure cistern fed supply of stored hot and cold water.
A Miniature Circuit Breaker is an electrical circuit protection device used as an alternative to rewireable and cartridge type fuses. It trips out when too much current flows in the circuit, typically on fault conditions. Do not confuse with R.C.D.
Manual Mixing Valve
A device which does not compensate for variations in the temperature or pressure of the incoming water supplies and needs to be adjusted manually.
The mixer valve and fittings.
Open Outlet Flow Rate
Maximum potential flow rate from mixing valve without shower fittings attached.
A pressure balancing compensatory shower mixer valve designed to maintain a constant shower temperature under variable inlet pressures but maintained inlet temperatures.
Pressure Relief Device
Safety device fitted to prevent excessive pressure building up within an electric shower heater.
A Residual Current Device is an accurate electrical balance that measures the electrical loading on the outgoing live and return neutral conductors. If any current leakage exceeds the trip value under a fault condition it turns off the power supply. An R.C.D. is sometimes known as E.L.C.B., R.C.C.B. or trip switch. Do not confuse with M.C.B.
The water pressure in the pipework to a fitting whilst flow is taking place.
Any device designed to produce a spray pattern.
A flexible pipe that connects between the shower head and the shower control.
A pre – assembled shower unit consisting of one or more jets, requiring minimal installation. Wall mounted, these units usually come with a variety of options ranging from thermostatic or manual mixing, with fixed overhead, flexible hand showers and body showers, which can be manually or electronically controlled.
The water pressure existing at a fitting when no flow is taking place.
Thermostatic Mixing Valve
A device to compensate for variations in the temperature and, or pressure of the incoming water supplies, to maintain a selected blend temperature.