Electric Shower Questions from Triton Showers Customer Service Team

Triton Electric Shower Questions

Does the wiring to an existing electric shower need upgrading when fitting a higher kilowatt rated unit?


Not necessarily, it will depend on the existing cable size and installation characteristics. A site inspection by a competent electrician is required to confirm if the existing cable and fuse will need upgrading.

How can I work out the running cost of an electric shower?


To establish the electricity cost firstly multiply the kW per hour tariff you are paying by the kW rating of the shower. The cost per shower is then dependant on the number of showers taken per hour.

Example for an 8kW shower unit.

Electricity tariff at 12 pence per kW hour multiplied by 8 = Total cost of 96 pence per hour.

Number of 5-minute showers taken in 1 hour = 12

96p divided by 12 = Total cost of 8 pence for a 5 minute shower

If there is not enough mains water pressure to operate an electric shower what can be done?


If the mains water pressure is insufficient then a Triton T450i single impeller pump can be used to supply water to most electric showers. Alternatively an integral pumped shower such as the T90xr can be installed.
Note: pumped showers must be fed from a cold water cistern they must not be connected to the mains cold water supply.

What is the minimum water pressure and flow rate required for Triton Electric Showers?


The minimum water pressure required depends upon the model and its kilowatt rating.

Some units will continue to operate at a reduced flow performance on a minimum running pressure/flow of 0.5bar at 8 litres per minute. However for full flow performance from all electric showers the following pressure and flow is required.

•7kW to 8.5kW showers require a minimum running pressure of 1 bar at a minimum flow rate of 8 litres per minute

•9kW and 9.5kW showers require a minimum running pressure of 1 bar at a minimum flow rate of 9 litres per minute

•10.5 kW showers require a minimum running water pressure of 1.5 bar at a minimum flow rate of 11 litres per minute

What points need to be considered when replacing an existing electric shower?

Considerations when replacing an electric shower are:

•Dimensions of the unit (will the replacement shower cover existing tiles and screw fixings)

•Cable and water entry points (are they compatible)

•Kilowatt rating of the unit (is the existing cable and fuse size adequate for a higher kW rating )

•Incoming electricity supply to the property (is the supply adequate i.e. 80 or 100amp for a higher kW rating )

What size fuse do I require for an electric shower?

The fuse size must be equal to or the nearest size above the kilowatt rating of the shower i.e.

•7kW = 30/32amp mcb

•7.5kW = 32amp mcb

•8kW = 40amp mcb

•8.5kW = 40amp mcb

•9.5kw = 40/45amp mcb

•10.5kW = 45/50amp mcb

Which electric shower do you recommend as a replacement for an old one?

The T80z is recommended as a replacement for all previous models of T80 i.e. T80Mk3, T80i, T80si and T80xr.

When replacing a T80xr it may be necessary to purchase the T80z uni-fit kit, which enables the existing supply cable to be extended and connected to the main terminal block and earth post in the shower.

The T80z is also an ideal replacement for other makes and models as water and cable entry points are on both the left and right hand side of the unit.

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